CN103856685A - Image Processing Apparatus and Image Processing Method - Google Patents
Image Processing Apparatus and Image Processing Method Download PDFInfo
- Publication number
- CN103856685A CN103856685A CN201310595311.2A CN201310595311A CN103856685A CN 103856685 A CN103856685 A CN 103856685A CN 201310595311 A CN201310595311 A CN 201310595311A CN 103856685 A CN103856685 A CN 103856685A
- Authority
- CN
- China
- Prior art keywords
- colour
- modulation
- output
- unit
- interim
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Facsimile Image Signal Circuits (AREA)
- Color Image Communication Systems (AREA)
Abstract
An image processing apparatus in the present disclosure includes a color conversion processing unit, a modulation candidate creating unit, a color value modulating unit, and an output unit. The color conversion processing unit performs color conversion from an input color value of a target image to a corresponding output color value to obtain a tentative output color value. The modulation candidate creating unit creates, as modulation candidates, combinations of integer values obtained by rounding up or down the decimal fraction of each color component of a tentative output color value. The color value modulating unit selects a modulation candidate at random and performs modulation by replacing the tentative output color value with the selected modulation candidate. The output unit outputs the target image according to the color value obtained after the modulation.
Description
Technical field
The present invention relates to a kind of the interim output colour of obtaining by color conversion is implemented brokenly trickle modulation, do not lost image quality and prevent image processing apparatus and the image processing method of the generation of false contouring thus.
Background technology
In the image processing systems such as typical printer, MFP, use the area gray level method or the pseudo-gray level method (dithering or error amount diffusion method etc. in order) that show virtually many-valued gray scale by the set of point to carry out image processing.
But, according to such image processing, in order to improve stability etc. and to have limited grey in the situation that, may there is the discontinuous situation that visually produces in image.Like this discontinuous becomes so-called false contouring, and image quality is significantly reduced.
Here in order to solve the problem of such false contouring, various technology have been proposed.For example, in input-output characteristic, lack successional part and add noise, or the fiducial value of alter error value diffusion method, the correction that improves thus gray scale.Propose to prevent by the raising of this gray scale the technology of the generation of false contouring.
But false contouring is because identical colour produces continuously in certain area sometimes.In aforesaid technology, can not effectively prevent such false contouring.
The problem of the false contouring, occurring continuously due to identical colour can not solve by aforesaid technology.
In addition, carry out too much the correction for preventing false contouring or process the reduction that likely causes on the contrary image quality.
Summary of the invention
The image processing apparatus that one aspect of the present invention relates to comprises: color conversion processing unit, modulation candidate generation unit, colour modulating unit and output unit.The input colour color conversion of object images is become corresponding output colour by color conversion processing unit, and obtain as interim output colour.Modulation candidate generation unit is exported the color component of colour temporarily according to each formation, by its fractional value carry or give up the throne, be modulation candidate by its integer-valued each combination producing forming thus.Colour modulating unit replaces to by export colour temporarily the modulation candidate of selecting randomly.The colour of output unit based on after modulating carried out the output of object images.
The image processing apparatus that another aspect of the present invention relates to comprises: color conversion processing unit, colour modulating unit and output unit.The input colour color conversion of object images is become corresponding output colour by color conversion processing unit, and obtain as interim output colour.Colour modulating unit will be exported colour temporarily and be modulated into: according to color component of this interim output colour of each formation, the probability by its fractional value based on determining accordingly with this value carry out carry or give up the throne after integer value.The colour of output unit based on after modulating carried out the output of object images.
In the image processing method relating in another situation of the present invention, the input colour color conversion of object images is become to corresponding output colour, and obtain as interim output colour, export the color component of colour according to each formation temporarily, by its fractional value carry or give up the throne, be modulation candidate by its integer-valued each combination producing forming thus, replace to by export colour temporarily the modulation candidate of selecting randomly, the colour based on after modulation is carried out the output of object images.
In the image processing method relating in another aspect of this invention, the input colour color conversion of object images is become to corresponding output colour, and obtain as interim output colour, to export colour is modulated into temporarily: according to the color component of this interim output colour of each formation, probability by its fractional value based on determining accordingly with this value carry out carry or give up the throne after integer value, the colour based on after modulation is carried out the output of object images.
Accompanying drawing explanation
Fig. 1 is the concise and to the point pie graph of the image processing apparatus that relates to of embodiments of the present invention;
Fig. 2 is the functional block diagram of the image processing apparatus that represents that the first execution mode of the present invention relates to;
Fig. 3 is the functional block diagram of the image processing apparatus that represents that the second execution mode of the present invention relates to;
Fig. 4 is the functional block diagram of the image processing apparatus that represents that the 3rd execution mode of the present invention relates to;
Fig. 5 is the figure for modulation channel selected cell is described;
Fig. 6 is the figure for the alternate manner of account for color conversion process.
Embodiment
Fig. 1 is the concise and to the point pie graph of the image processing apparatus that relates to of embodiments of the present invention.
As shown in Figure 1, the image processing apparatus 1 of present embodiment comprises input unit 10, control unit 11, output unit 12.The image of input unit 10 input objects.Control unit 11 carries out the necessary image processing to inputted object images.The outputs such as the image of output unit 12 based on implemented image processing by control unit 11 prints.For example, the image processing apparatus of present embodiment is colored corresponding printer or MFP(Multifunction Peripheral, multifunction peripheral) etc. image processing system.
Image processing in control unit 11 comprises: the input colour color conversion of object images is become to the processing of output colour or utilize aforesaid area gray level method etc. to generate the processing of dot image.
More particularly, so-called image processing refers to: to analyzing from the printed data of the inputs such as PC, by target with rgb value (input colour) color conversion become corresponding CMYK value (output colour).Then, generate dot image through rasterization process or screen processing.Then,, for generated dot image, carry out printing treatment by the each toner that is suitable for cyan (C), magenta (M), yellow (Y), black (K).
(the first execution mode)
Fig. 2 is the functional block diagram of the image processing apparatus that represents that the first execution mode of the present invention relates to.As shown in Figures 1 and 2, the control unit 11A of present embodiment comprises color conversion processing unit 110 and colour modulating unit 111.Color conversion processing unit 110 output colour corresponding to the input colour color conversion of object images becomes and obtains as interim output colour.Colour modulating unit 111 is for interim output colour, according to color component of this interim output colour of each formation carry out by its fractional value randomly carry or the mantissa of giving up the throne process, modulate thus.
Color conversion processing unit 110 comprises from RGB to CMYK converting unit 1100.Carry out color conversion from RGB to CMYK converting unit 1100 by the color corresponding with the colour (rgb value) of each pixel of input picture to the colour (CMYK value) of the output form that can reproduce.Specifically, comprise in advance from RGB to CMYK converting unit 1100 by the lattice point suitable with the mapping of rgb value and CMYK value and present the latticed LUT(Look Up of three-dimensional orthogonal Table, look-up table).Then,, by reference to this LUT, the rgb value color conversion of object pixel is become to corresponding CMYK value.For the rgb value that is positioned at the coordinate between lattice point, obtain corresponding CMYK value by known interpolation arithmetic.
In addition, CMYK value related between each lattice point and lattice point is carried out to fractional value definition, and do not carry out mantissa's processing or the integer definition of fractional value.
In addition, the output colour (CMYK value) not also being implemented after the color conversion of modulation is called to interim output colour (temporary transient CMYK value).
Final CMYK value candidate generation unit (modulation candidate generation unit) 1110 carries out the color component of temporarily exporting colour according to each formation using its fractional value carry or gives up the throne and its integer-valued each combination of forming generates as modulating candidate.
For example, in the situation of interim output colour { C, M, Y, K }={ 125.5,133.2,234.8,58.1 }, be divided into integer part { 125,133,234,58 } and fractional part { 0.5,0.2,0.8,0.1 }.Obtain for C, M, Y, each in K is by the value carry of fractional part and add 1 or the value of fractional part is given up the throne and the combination that keeps the value of original integer part to the value of integer part.Consequently, 2 below generation
4the modulation candidate of=16 kinds.
｛125，133，234，58｝、｛125，133，234，59｝、｛125，133，235，58｝、｛125，133，235，59｝、｛125，134，234，58｝、｛125，134，234，59｝、｛125，134，235，58｝、｛125，134，235，59｝、｛126，133，234，58｝、｛126，133，234，59｝、｛126，133，235，58｝、｛126，133，235，59｝、｛126，134，234，58｝、｛126，134，234，59｝、｛126，134，235，58｝、｛126，134，235，59｝
In addition, also can not carry out the carry of fractional value and the ambilateral processing of giving up the throne, but only obtain carry value, and obtain other modulation candidate by subtracting " 1 " from this value.In addition, also can only obtain the value of giving up the throne, and obtain other modulation candidate by adding " 1 " to this value.
Final CMYK value candidate generation unit 1110 is preserved generated modulation candidate.
Final CMYK value setup unit (colour modulating unit) 1111 is selected randomly a modulation candidate from the modulation candidate being generated by final CMYK value candidate generation unit 1110.Then, final CMYK value setup unit (colour modulating unit) 1111 is by replacing interim output colour and selected modulation candidate is modulated.
For example, preserve in advance the corresponding relation of the numerical value of the random number that can be produced by random number generation unit 1112 or the modulation candidate of number range and described 16 kinds.From this corresponding relation, obtain with by modulation candidate corresponding to the current random number obtaining of random number generation unit 1112, and will export colour temporarily and replace with this modulation candidate.
Consequently, original interim CMYK value is individually added 1 or be kept its integer-valued value and be exported to output unit 12 with C, M, Y, K.
The colour of output unit 12 based on after modulating by this way carried out the output of object images.
Modulation extra switch 1113 is carried out the setting that whether will modulate according to user's setting operation.
Modulation extra switch 1113 is exported setting signal to final CMYK value setup unit 1111.
If input the signal of the meaning of not carrying out modulating to final CMYK value setup unit 1111 from modulation extra switch 1113, the original interim CMYK value of non-modulated is directly exported to output unit 12.Final CMYK value candidate generation unit 1110 also can control to realize this function in the mode that does not generate modulation candidate.
In this case, colour modulating unit 112 is not modulated, and output unit 12 carries out the output of object images based on interim output colour.
Being formed in situation about cannot effectively modulate is like this easily.So-called situation about cannot effectively modulate refers to: for example, even if do not imagine false contouring and do not occur to wait, do not sacrifice the situation of the advantage that yet will modulate of image quality, the situation of not wishing to become due to identical colour the reduction of the discontinuous compression ratio causing.
As mentioned above, the related image processing apparatus 1 of the first execution mode of the present invention is to interim CMYK value, according to each C, M, Y, K carry out by its fractional value randomly carry or the mantissa of giving up the throne process to replace colour, thus interim CMYK value is modulated.
Therefore, output colour becomes trickle and irregular colour, therefore can effectively prevent the generation of the false contouring causing continuously due to identical colour.
In addition, because the value based on suitable with the minimum resolution of output colour is carried out the modulation of colour, therefore can solve the problem of the balance of the reduction of image quality on the other hand of the generation that prevents false contouring.
The image processing apparatus 1 relating to according to present embodiment also can effectively prevent the generation of false contouring in keeping image quality.
(the second execution mode)
Then the image processing apparatus 1, the second execution mode of the present invention being related to describes.Fig. 3 is the functional block diagram of the image processing apparatus that relates to of present embodiment.
As shown in Figure 3, in the image processing apparatus 1 of present embodiment, control unit 11B and the first execution mode similarly comprise color conversion processing unit 110 and colour modulating unit 111.The control unit 11B of present embodiment also comprises fractional part comparing unit 1114.
Integer part/fractional part separative element 1110 separates integer part and the fractional part of interim output colour.Then, integer part is exported to final CMYK value setup unit 1111, fractional part is exported to fractional part comparing unit 1113.
Random number generation unit 1112 using numerical value contained in 0～1 scope (fractional value) randomly and as within the scope of this roughly uniformly random number produce.For example produce random number for each pixel of the object as modulation, and the numerical value of the random number producing successively according to each C, M, Y, K is exported to fractional part comparing unit 1114.
Fractional part comparing unit 1114, the value (fractional value) of the fractional part of the interim output colour of relatively inputting from integer part/fractional part separative element 1110 and the random number being produced by random number generation unit 1112.Then, exceed the value of random number at the fractional value of interim output colour, export the instruction that makes the meaning that this fractional value gives up the throne to final CMYK value setup unit 1111.Below value at the fractional value of interim output colour in random number, the instruction of exporting the meaning that makes this fractional value carry to final CMYK value setup unit 1111.
Final CMYK value setup unit 1111 is according to the instruction of inputting from fractional part comparing unit 1114, and modulation is output colour temporarily.Specifically, according to the instruction of " meaning of carry ", be modulated into by export temporarily colour fractional value carry value, the integer value of interim output colour is added to 1 value.On the other hand, according to the instruction of " meaning of giving up the throne ", be modulated into the value that the fractional value of temporarily exporting colour is given up the throne, the integer value of temporarily exporting colour.
Respectively for C, M, Y, K carries out such carry or the processing of giving up the throne, and is therefore actually from the modulation candidate of 16 kinds and selects any one to modulate.
For example, the modulation treatment that is the situation of { C, M, Y, K }={ 125.5,133.2,234.8,58.1 } to the interim output colour of object pixel describes.
In this case, integer part is { 125,133,234,58 }, and fractional part is { 0.5,0.2,0.8,0.1 }.In addition, in this example, as with C, M, Y, the random number that K is corresponding and obtained 0.11,0.82,0.45,0.61.
Due to C(cyan) the fractional value (0.5) of interim output colour exceed the value (0.11) of random number, therefore make fractional value give up the throne, and become C=125.
If for M(magenta), Y(yellow), K(black) also carry out same processing, M=134, Y=234, K=59.
Consequently, the interim CMYK value { 125.5,133.2,234.8,58.1 } of object is modulated into { 125,134,234,59 }.
In addition, can not also to obtain random number according to each channel as described above, but for the pixel of object, the judgement that each channel carries out carry or gives up the throne take same random number as benchmark.
Here the effect of carrying out the situation of such modulation treatment for the continuous part of identical colour (comprising fractional value) is described.
As an example, the situation that the region of 100 of the continuous pixels of interim output colour { C, M, Y, K }={ 125.5,133.2,234.8,58.1 } is modulated is described.
In this case, obtain 100 random numbers suitable with this continuous pixel count.Each random number is that the fractional value being included in 0～1 scope is roughly produced equably within the scope of this.In above-mentioned example, the interim output colour of K is because this fractional value is 0.1, therefore exceedes 0.1 probability ((1-0.1)/1=90%) with random number and gives up the throne, thereby modulate.
So, compared with the situation that only fractional value is rounded up to modulate, can more effectively prevent false contouring.
For example, in above-mentioned example, if hypothesis rounds up, fractional value is modulated, and the K value in 100 contiguous pixels is given up the throne without exception, and the colour after modulation all becomes identical value (K=58).But, according to present embodiment, in the K value in 100 contiguous pixels, given up the throne for 90,10 by carry, and the pixel of the pixel of the colour of K=58 and the colour of K=59 is distributed.
Therefore, according to the modulation treatment of present embodiment, especially, even if identical continuous pixels, also can effectively prevent the generation of false contouring in colour in fractional value level.
Modulation extra switch 1113 is carried out the setting that whether will modulate according to user's setting operation.This is identical with aforesaid execution mode one.
Like this, the image processing apparatus 1 relating to second embodiment of the invention, carry out as modulated: interim CMYK value is become C, M, Y, the probability carry of the fractional value of the output colour of K based on corresponding with this value or give up the throne after integer value.Therefore, output colour becomes trickle and irregular colour, can prevent the generation of the false contouring causing continuously due to identical colour.
In addition, because the value based on suitable with the minimum resolution of output colour is carried out the modulation of colour, therefore, can solve the problem of the balance that image quality reduces in the generation that prevents false contouring.The image processing apparatus 1 relating to according to present embodiment also can effectively prevent the generation of false contouring in keeping image quality.
(the 3rd execution mode)
Then the image processing apparatus 1, the 3rd execution mode of the present invention being related to describes.
Fig. 4 is the functional block diagram of the image processing apparatus that relates to of present embodiment.
As shown in Figure 4, in the image processing apparatus 1 of present embodiment, control unit 11C and aforesaid execution mode similarly comprise color conversion processing unit 110 and colour modulating unit 111.The control unit 11C of present embodiment also comprises modulation channel selected cell (color selected cell) 1115.
Below, the item relevant with modulation channel selected cell 1115 described, omit the detailed description to other Component units.
Modulation channel selected cell 1115 operates according to user's selection, part or all of the color component of the interim output of selection formation colour.
Specifically, as shown in Figure 5, the pattern corresponding with selective channel is set.The so-called pattern corresponding with selective channel refers to: for example, and the situation (first mode) of (i) only K channel being modulated, (ii) a situation (the second pattern) that CMY channel is modulated, (iii) situation (three-mode) that the whole channel of CMYK is modulated.User can select any one pattern by certain operation.
If modulation channel is selected in the selection by pattern, the switch-over control signal that includes the identifying information of selected channel is exported to final CMYK value setup unit 1111.Final CMYK value setup unit 1111 is determined modulation object channel from this identifying information, thereby only the interim output colour of this channel is modulated.
In addition, also the control signal that includes identifying information can be exported to final CMYK value candidate generation unit 1110.In this case, 1110 of final CMYK value candidate generation units generate the modulation candidate of selected channel, only specific channel are modulated.
For example, in the situation that having selected first mode, final 1110 of CMYK value candidate generation units carry out the fractional value carry of interim CMYK value or the processing of giving up the throne K channel, and are generated as modulation candidate by integer-valued one group of interim CMYK value.Consequently, generate the modulation candidate of 2 following kinds.｛125，133，234，58｝、｛125，133，234，59｝
In addition, in the situation that having selected the second pattern, 1110 of final CMYK value candidate generation units are to C, M, and each channel of Y carries out, by the fractional value carry of interim CMYK value or the processing of giving up the throne, being generated as modulation candidate by integer-valued one group of interim CMYK value.Consequently, 2 below generation
3the modulation candidate of=8 kinds.
｛125，133，234，58｝、｛125，133，235，58｝、｛125，134，234，58｝、｛125，134，235，58｝、｛126，133，234，58｝、｛126，133，235，58｝、｛126，134，234，58｝、｛126，134，235，58｝
Final CMYK value setup unit 1111 is selected randomly a modulation candidate from these modulation candidates, modulates by the modulation candidate of this selection is replaced to interim output colour.
Then, the interim output colour of the color component based on having carried out the colour of modulation and modulate is carried out the output of object images.
As mentioned above, the image processing apparatus 1 that the 3rd execution mode according to the present invention relates to, comprises modulation channel selected cell 1115 by control unit 11C, and user can select desirable modulator approach.
Therefore, for example, in the case of wanting to avoid the modulation of form and aspect, by the first mode of selecting CMY channel not to be modulated, can only on luminance directions, modulate.
In addition, in the situation that not wishing that graininess changes or not wishing that large brightness changes, by the second pattern of selecting K channel not to be modulated, can carry out desirable modulation.
In addition, in above-mentioned example, exemplified with the example of selecting in the first embodiment modulator approach, still, also can be used as the formation of selecting modulator approach in the 2nd real is executed example.
Thereby, bring into play the action effect same with the first execution mode, image processing apparatus 1 very easily can also be provided concerning user.
The present invention is not limited to the above embodiments.
For example, the present invention also can be useful in printer, MFP image processing system in addition.
In addition, in aforesaid execution mode, from RGB to CMYK converting unit 1100 via input colour and the LUT of 1 grade that is directly mapped of output colour are carried out to color conversion processing.But the present invention is not limited to this form.The present invention, as long as a result of obtaining the output colour of image processing apparatus 1, is not particularly limited formation or the color conversion processing operation etc. of LUT.
For example, as shown in Figure 6, can the color conversion processing of rgb value (input colour) and CMYK value (output colour) be divided into several stages via the LUT that carries out color conversion to XYZ space or Lab space and carry out.
Claims (8)
1. an image processing apparatus, is characterized in that, comprising:
Color conversion processing unit, the input colour color conversion of object images is become corresponding output colour by described color conversion processing unit, and obtain as interim output colour;
Modulation candidate generation unit, described modulation candidate generation unit is according to the color component of the described interim output colour of each formation, by fractional value carry or give up the throne, is modulation candidate by the integer-valued each combination producing forming thus;
Colour modulating unit, described colour modulating unit carries out described interim output colour to replace to the modulation of the described modulation candidate of selecting randomly;
Output unit, the colour of described output unit after based on described modulation carried out the output of described image.
2. an image processing apparatus, is characterized in that, comprising:
Color conversion processing unit, the input colour color conversion of object images is become corresponding output colour by described color conversion processing unit, and obtain as interim output colour;
Colour modulating unit, described colour modulating unit is modulated into described interim output colour: according to color component of this interim output colour of each formation, the probability by its fractional value based on determining accordingly with described fractional value carry out carry or give up the throne after integer value;
Output unit, the colour of described output unit after based on described modulation carried out the output of described image.
3. according to the image processing apparatus described in any one in claim 1 or 2, it is characterized in that,
Also comprise modulation extra switch,
Described modulation extra switch carries out whether will carrying out the setting of described modulation according to setting operation,
Whether described output unit or not the setting of described modulation in the case of having carried out, and carries out the output of described image based on described interim output colour.
4. according to the image processing apparatus described in any one in claim 1 or 2, it is characterized in that,
Also comprise color selected cell,
Described color selected cell is according to selecting operation to select to form part or all of color component of described interim output colour,
The described colour modulating unit only interim output colour of the color component to described selection carries out described modulation,
The described interim output colour of described output unit based on having carried out the colour of described modulation and not carried out the color component of described modulation carried out the output of described image.
5. an image processing method, is characterized in that,
The input colour color conversion of object images is become to corresponding output colour, and obtains as interim output colour,
According to the color component of the described interim output colour of each formation, by fractional value carry or give up the throne, be modulation candidate by the integer-valued each combination producing forming thus,
Carry out described interim output colour to replace to the modulation of the described modulation candidate of selecting randomly,
Carry out the output of described image based on the colour after described modulation.
6. an image processing method, is characterized in that,
The input colour color conversion of object images is become to corresponding output colour, and obtains as interim output colour,
Described interim output colour is modulated into: according to color component of this interim output colour of each formation, the probability carry by its fractional value based on determining accordingly with described fractional value or give up the throne after integer value,
Carry out the output of described image based on the colour after described modulation.
7. according to the image processing method described in any one in claim 5 or 6, it is characterized in that,
According to setting operation, carry out whether will carrying out the setting of described modulation,
Or not the setting of described modulation in the case of having carried out, carry out the output of described image based on described interim output colour.
8. according to the image processing method described in any one in claim 5 or 6, it is characterized in that,
According to selecting operation, part or all of the color component of the described interim output colour of selection formation,
Only the interim output colour of the color component to described selection is carried out described modulation,
Described interim output colour based on having carried out the colour of described modulation and not carried out the color component of described modulation is carried out the output of described image.
Applications Claiming Priority (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012263436A JP5747017B2 (en) | 2012-11-30 | 2012-11-30 | Image processing apparatus and image processing program |
| JP2012263437A JP2014110501A (en) | 2012-11-30 | 2012-11-30 | Image processor and image processing program |
| JP2012-263436 | 2012-11-30 | ||
| JP2012-263439 | 2012-11-30 | ||
| JP2012-263438 | 2012-11-30 | ||
| JP2012-263437 | 2012-11-30 | ||
| JP2012263438A JP5759962B2 (en) | 2012-11-30 | 2012-11-30 | Image processing apparatus and image processing program |
| JP2012263439A JP5759963B2 (en) | 2012-11-30 | 2012-11-30 | Image processing apparatus and image processing program |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103856685A true CN103856685A (en) | 2014-06-11 |
| CN103856685B CN103856685B (en) | 2017-05-03 |
Family
ID=50863851
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310595311.2A Expired - Fee Related CN103856685B (en) | 2012-11-30 | 2013-11-21 | Image Processing Apparatus and Image Processing Method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103856685B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105323418A (en) * | 2014-07-17 | 2016-02-10 | 富士施乐株式会社 | Information processing apparatus |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040183820A1 (en) * | 2002-04-24 | 2004-09-23 | Isao Kawahara | Image display device |
| CN1542715A (en) * | 2003-04-02 | 2004-11-03 | 夏普株式会社 | Driving device for image display apparatus, program and storage medium thereof, image display apparatus and television receiver |
| CN101452235A (en) * | 2007-12-05 | 2009-06-10 | 株式会社理光 | Image processing apparatus, image processing method, and computer-readable encoding medium encoded with a computer program |
-
2013
- 2013-11-21 CN CN201310595311.2A patent/CN103856685B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040183820A1 (en) * | 2002-04-24 | 2004-09-23 | Isao Kawahara | Image display device |
| CN1542715A (en) * | 2003-04-02 | 2004-11-03 | 夏普株式会社 | Driving device for image display apparatus, program and storage medium thereof, image display apparatus and television receiver |
| CN101452235A (en) * | 2007-12-05 | 2009-06-10 | 株式会社理光 | Image processing apparatus, image processing method, and computer-readable encoding medium encoded with a computer program |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105323418A (en) * | 2014-07-17 | 2016-02-10 | 富士施乐株式会社 | Information processing apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103856685B (en) | 2017-05-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5948737B2 (en) | Image processing apparatus, image processing method, and image processing program | |
| JP2008005317A (en) | Image processor and image processing method, and computer program and recording medium | |
| CN101277369A (en) | Image forming apparatus and control method thereof | |
| JP2015156570A (en) | Color processing apparatus, image forming apparatus, and program | |
| US7656414B2 (en) | System and method for determination of gray for CIE color conversion using chromaticity | |
| US10194052B2 (en) | Post processing halftone images | |
| JP2015216455A (en) | Image processing device, image processing method and program | |
| US7679783B2 (en) | System and method for extracting grayscale data within a prescribed tolerance | |
| KR20060107395A (en) | Color error diffusion | |
| JP6341750B2 (en) | Image processing apparatus, image processing method, and program | |
| KR20040070893A (en) | Color halftoning apparatus and method, and mask generation apparatus and method therein | |
| CN103841385A (en) | Image dithering processing method and device | |
| CN103856685A (en) | Image Processing Apparatus and Image Processing Method | |
| CN103856684A (en) | Image processing apparatus and image processing method | |
| CN107980218B (en) | For gray component substitution method, printing device and machine readable storage medium | |
| US9191552B2 (en) | Image processing apparatus that performs color conversion and image processing method | |
| US20060072127A1 (en) | System and method for image dependent black generation using the human contrast function's sensitivity to high frequencies in the luminous channel | |
| JP2005210339A (en) | Image processor, print controller, and image processing method and program | |
| JP5337060B2 (en) | Image processing apparatus, control method, and program | |
| JP4539979B2 (en) | Image processing apparatus and image processing method | |
| JP5759962B2 (en) | Image processing apparatus and image processing program | |
| JP2013102299A (en) | Image processor and image processing method | |
| JP2009159284A (en) | Color data conversion apparatus, color data conversion method and color data conversion program | |
| JP2009296139A (en) | Image processor, image processing method and computer program | |
| JP2005295131A (en) | Apparatus, method, and program for processing image |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170503 Termination date: 20201121 |