CN107621929B - Gray scale thermal printing method, thermal printer and readable storage medium - Google Patents
Gray scale thermal printing method, thermal printer and readable storage medium Download PDFInfo
- Publication number
- CN107621929B CN107621929B CN201710819425.9A CN201710819425A CN107621929B CN 107621929 B CN107621929 B CN 107621929B CN 201710819425 A CN201710819425 A CN 201710819425A CN 107621929 B CN107621929 B CN 107621929B
- Authority
- CN
- China
- Prior art keywords
- bitmap
- value
- pixel
- rbg
- current pixel
- 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.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 25
- 238000007651 thermal printing Methods 0.000 title claims abstract description 24
- 238000007639 printing Methods 0.000 claims abstract description 53
- 230000002093 peripheral effect Effects 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 8
- 239000011159 matrix material Substances 0.000 claims abstract description 8
- 238000004590 computer program Methods 0.000 claims description 13
- 238000010586 diagram Methods 0.000 claims description 3
- 238000009825 accumulation Methods 0.000 claims 1
- 230000000007 visual effect Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003384 imaging method Methods 0.000 description 2
- 238000003491 array Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000001931 thermography Methods 0.000 description 1
Images
Abstract
The invention provides a gray scale thermal printing method, a thermal printer and a readable storage medium, wherein the printing method comprises a bitmap processing step, a bitmap conversion step and a printing step; the bitmap processing step comprises the following steps: receiving an original bitmap; obtaining pixels of an original bitmap; generating an array of pixels for the original bitmap; the RBG value of the current pixel is taken out and an index of the current pixel is generated; processing RBG value pixels of peripheral pixels of the current pixel according to the RBG value of the current pixel, the index of the current pixel and the processing coefficient; preserving RBG values of surrounding pixels; the bitmap conversion step is to generate a new bitmap; the printing step is to perform thermal printing according to the dot matrix image. The black and white indexes are generated and added to peripheral pixels by preset processing coefficients, then a bitmap is generated according to the processed new bitmap, and finally gray printing is finished, so that gray printing of patterns can be realized by processing the color bitmap, and the thermal printing can be realized.
Description
Technical Field
The present invention relates to the field of thermal printing, and more particularly, to a gray scale thermal printing method, a thermal printer, and a computer readable storage medium.
Background
The automatic cash dispenser of the bank, the cash register of the supermarket and the delivery place of the electronic commerce are all provided with thermal printers for printing transaction receipt, receipt or express bill. The method is limited by a thermal printing principle, characters are generally recorded on a thermal printing receipt, characters are formed through matching of black points and white points, and images are difficult to form, so that gray imaging is more difficult, along with diversification of printing contents, besides transaction recorded characters are formed on the receipt, the printing of the patterns can be more vividly printed by using gray printing besides improving the attractiveness, however, gray imaging of a color bitmap through thermal printing cannot be realized in the prior art.
Disclosure of Invention
A first object of the present invention is to provide a gray scale thermal printing method for realizing gray scale printing.
A second object of the present invention is to provide a thermal printer that achieves gray scale printing.
A third object of the present invention is to provide a computer-readable storage medium that implements grayscale printing.
In order to achieve the first object of the present invention, the present invention provides a gray scale thermal printing method, characterized by comprising a bitmap processing step, a bitmap converting step, and a printing step;
the bitmap processing step comprises the following steps:
receiving an original bitmap;
obtaining pixels of an original bitmap;
generating an array of pixels for the original bitmap;
judging, namely judging whether all pixels are processed;
if not, carrying out a color matching step on the pixels;
if so, a new bitmap is generated,
the color matching step comprises the following steps:
the RBG value of the current pixel is taken out and an index of the current pixel is generated;
processing RBG value pixels of peripheral pixels of the current pixel according to the RBG value of the current pixel, the index of the current pixel and the processing coefficient;
preserving RBG values of surrounding pixels;
returning to the judging step, the method comprises the steps of,
the conversion steps of the bitmap are as follows: generating a new bitmap into a bitmap;
the printing steps are as follows: and performing thermal printing according to the dot matrix map.
Still further, the step of retrieving the RBG value of the current pixel and generating the index of the current pixel includes:
the RBG value of the current pixel and the full-white RBG value are subjected to difference, and a white difference value is generated;
the RBG value of the current pixel and the full black RBG value are subjected to difference, and a black difference value is generated;
when the absolute value of the white difference value is smaller than that of the black difference value, setting the index of the current pixel as full white;
when the absolute value of the black difference value is smaller than the absolute value of the Yu Bai difference value, the index of the current pixel is set to be full black.
Still further, the pixel array is a one-dimensional array.
Still further, the processing coefficient is greater than 0 and less than 1.
In a further aspect, the step of generating the bitmap from the new bitmap includes:
the RBG value and the full-white RBG value of the pixel are subjected to difference, and a white difference value is generated;
the RBG value of the pixel and the full black RBG value are subjected to difference, and a black difference value is generated;
when the absolute value of the white difference value is smaller than that of the black difference value, setting the point in the pixel corresponding bitmap as a white point;
when the absolute value of the black difference value is smaller than the absolute value of the Yu Bai difference value, the point in the pixel corresponding bitmap is set as a black point.
Still further, the step of processing the RBG value pixels of the peripheral pixel of the current pixel according to the RBG value of the current pixel, the index of the current pixel and the processing coefficient includes:
generating an RGB difference value, wherein the RGB difference value is the difference value between the RBG value of the current pixel and the index of the current pixel;
the product of the RGB difference and the processing coefficient is added to the RGB values of the surrounding pixels.
Still further, the peripheral pixels include a right first pixel, a right second pixel, a lower first pixel, a lower second pixel, a lower left first pixel, and a lower right first pixel based on the current pixel.
In order to achieve the second object of the present invention, there is provided a thermal printer, characterized in that the thermal printer includes a processor for implementing the steps of the printing method according to any one of the above-mentioned aspects when executing a computer program stored in a memory.
In order to achieve the third object of the present invention, the present invention provides a computer-readable storage medium having stored thereon a computer program characterized in that: the computer program when executed by a processor implements the steps of a printing method according to any one of the above aspects.
According to the scheme, the dot matrix patterns are formed on the printing paper through heating of the dot matrix during thermal printing, so that each corresponding printing point only has two states, namely white points or black points, and gray printing cannot be realized from each printing point, but because the patterns are formed as a whole, a person has visual deviation in observation of dense printing points, after the color bitmap is processed, the patterns and characters formed by black and white dot patterns can be printed through thermal printing, gray difference patterns and characters can be formed visually, specifically, indexes of black and white are generated and accumulated in surrounding pixels through preset processing coefficients, a new bitmap is stored after processing, the dot patterns are generated according to the processed new bitmap, gray printing is finished finally, and gray printing of the patterns can be realized through processing the color bitmap.
Drawings
FIG. 1 is a schematic diagram of an implementation of an embodiment of a gray scale thermal printing method of the present invention.
FIG. 2 is a flow chart of an embodiment of a gray scale thermal printing method of the present invention.
FIG. 3 is a flowchart of bitmap processing steps in an embodiment of a grayscale thermal printing method of the present invention.
The invention is further described below with reference to the drawings and examples.
Detailed Description
Firstly, according to the principle of forming a gray image by thermal printing, in the prior art, if a color bitmap is directly converted into a bitmap, judging whether each pixel is close to full white or close to full black, and converting the bitmap into the bitmap according to the principle, if a pattern with gradual change color appears in the color bitmap, the pattern is possibly completely converted into full black or full white due to the fact that pixel values are close to each other, the gradual change process of the color cannot be well reflected, and even the original pattern cannot be clearly displayed.
Meanwhile, it should be noted that the gray printing described in this case does not refer to implementing different gray printing in one pixel, but the gray printing formed by the visual effect of human eyes is adopted in this case, referring to fig. 1, a display block with a resolution of 6 9*9 is included in fig. 1, each small square may correspond to each pixel of a bitmap, or each point of a bitmap, in fig. 1a, no square is filled with black, which represents that the display block is on full-white printing. In fig. 1b, there are 9 squares evenly distributed to fill in black, which represents the gray scale printing of the display tile at the first level. In fig. 1c, there are 25 tiles evenly distributed to fill in black, which represents a gray scale print of the display tile at the second level. In fig. 1d, there are 27 tiles evenly distributed to fill in black, which represents a third level of grayscale printing of the display tile. In fig. 1e, there are 41 squares evenly distributed to fill in black, which represents a gray scale print of the display tile at the fourth level. In fig. 1f, all tiles are filled in black, which represents the display tile on a full black print.
Of course, fig. 1 is only used to illustrate the printing of a small area on the printing paper, and of course, when the printing dot density of the thermal printer reaches 300-600 each time, the gray scale can be formed by using the density distribution of black dots and the density distribution of white dots in human vision, so as to realize gray scale printing.
The following describes how the conversion is implemented in order to be able to achieve such a sparser and denser distribution of points.
Referring to fig. 2, the gray thermal printing method includes an input bitmap S1, a bitmap processing step S2, a bitmap conversion step S3, and a printing step S4, and referring to fig. 3, the bitmap conversion step S2 includes:
step S21, receiving an original bitmap, wherein the original bitmap can be a color bitmap or a black-and-white bitmap with gray scale;
step S22, obtaining the pixel of the original bitmap,
step S23, generating a pixel array according to the pixels of the original bitmap, wherein the pixel array is a one-dimensional array, and each pixel is P i [R、G、B]I=row×width+col, i is the index position of the array, where row is the row, width is the width of the row, and col is the column.
Step S24, a judging step is executed to judge whether all pixels are processed.
If not, the pixel is subjected to a color matching step.
The color matching step comprises the following steps:
step S25, the RBG value of the current pixel is taken out and the index of the current pixel is generated, specifically comprising:
the RBG value P of the current pixel i [R、G、B]And full-white RBG values [255, 255]]Solving the difference and generating a white difference value;
the RBG value P of the current pixel i [R、G、B]And full black RBG value [0, 0]Solving the difference and generating a black difference value;
when the absolute value of the white difference value is smaller than that of the black difference value, setting the index of the current pixel as full white [255, 255];
when the absolute value of the black difference value is smaller than the absolute value of the Yu Bai difference value, the index of the current pixel is set to be all black [0, 0].
That is, whether the RBG value of the current pixel is close to full white or full black is judged, the index is set to full white when the RBG value is close to full white, and the index is set to full black when the RBG value is close to full black.
Step S26, the RBG value pixels of the peripheral pixels of the current pixel are processed according to the RBG value of the current pixel, the index of the current pixel and the processing coefficient, and the steps specifically comprise:
generating RGB difference value, which is the difference between RBG value of current pixel and index of current pixel, namely [ R1, G1, B1]]Equal to P i [R、G、B]Subtracting [255, 255]]Or [ R1, G1, B1]]Equal to P i [R、G、B]Subtracting [0, 0]；
The product of the RGB difference values R1, G1, B1 and the processing coefficient K is added to the RGB values of the surrounding pixels. Preferably, the processing coefficient K is a constant of more than 0 and less than 1, and can be adjusted according to the requirements of the user on the depth, and further preferably, the processing coefficient K takes a value of 0.25-0.5.
And the peripheral pixels include a right first pixel, a right second pixel, a lower first pixel, a lower second pixel, a lower left first pixel and a lower right first pixel based on the current pixel.
Step S27, storing the updated new pixel RGB values.
And then returning to the step S24, judging whether all pixels are processed, if not, continuing to process the next pixel according to the steps, wherein the specific processing sequence can be that the pixels are processed from left to right, namely, the top left corner point is firstly processed, the bottom right corner point is finally processed, and the processing sequence is installed.
When all the processing is completed, step S28 is executed to save and generate a new bitmap.
Executing step S3, namely generating a new bitmap into a bitmap, wherein the bitmap comprises the steps of differencing RBG values of pixels and full-white RBG values and generating a white difference value;
the RBG value of the pixel and the full black RBG value are subjected to difference, and a black difference value is generated;
when the absolute value of the white difference value is smaller than that of the black difference value, setting the point in the pixel corresponding bitmap as a white point;
when the absolute value of the black difference value is smaller than the absolute value of the Yu Bai difference value, the point in the pixel corresponding bitmap is set as a black point.
And finally, executing step S4, wherein the thermal printer performs thermal imaging on printing paper according to the dot matrix diagram, and printing with different dot densities is utilized, so that gray printing is realized.
Thermal printer embodiment:
the thermal printer comprises a processor for implementing the steps of the printing method according to any one of the above aspects when executing a computer program stored in a memory.
Computer-readable storage medium embodiments:
a computer readable storage medium has stored thereon a computer program which, when executed by a processor, performs the steps of a printing method according to any of the above aspects.
It should be noted that the computer may be a computing device such as a desktop computer, a notebook computer, a palm computer, a cloud server, etc., and the computer may also include, but is not limited to, a processor and a memory.
The processor may be a central processing unit (Central Processing Unit, CPU), other general purpose processors, digital signal processors (Digital Signal Processor, DSP), application specific integrated circuits (Application Specific Integrated Circuit, ASIC), off-the-shelf programmable gate arrays (Field-Programmable Gate Array, FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, or the like. The general purpose processor may be a microprocessor or the processor may be any conventional processor or the like, which is a control center of the multi-turn absolute value encoder and the driving device, and connects various parts of the entire multi-turn absolute value encoder, the driving device by various interfaces and lines.
The memory may be used to store the computer program and/or module, and the processor may implement the various functions of the multi-turn absolute value encoder and the driving apparatus by running or executing the computer program and/or module stored in the memory, and invoking data stored in the memory. The memory may mainly include a memory program area and a memory data area. In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as a hard disk, memory, plug-in hard disk, smart Media Card (SMC), secure Digital (SD) Card, flash Card (Flash Card), at least one disk storage device, flash memory device, or other volatile solid-state storage device.
Additionally, the computer program comprises computer program code which may be in source code form, object code form, executable file or some intermediate form, etc. The computer readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a U disk, a removable hard disk, a magnetic disk, an optical disk, a computer Memory, a Read-Only Memory (ROM), a random access Memory (RAM, randomAccess Memory), an electrical carrier signal, a telecommunication signal, a software distribution medium, and so forth.
According to the scheme, the dot matrix patterns are formed on the printing paper through heating of the dot matrix during thermal printing, so that each corresponding printing point only has two states, namely white points or black points, and gray printing cannot be realized from each printing point, but because the patterns are formed as a whole, a person has visual deviation in observation of dense printing points, after the color bitmap is processed, the patterns and characters formed by black and white dot patterns can be printed through thermal printing, gray difference patterns and characters can be formed visually, specifically, indexes of black and white are generated and accumulated in surrounding pixels through preset processing coefficients, a new bitmap is stored after processing, the dot patterns are generated according to the processed new bitmap, gray printing is finished finally, and gray printing of the patterns can be realized through processing the color bitmap.
Claims (6)
1. The gray scale thermal printing method is characterized by comprising a bitmap processing step, a bitmap conversion step and a printing step;
the bitmap processing step comprises the following steps:
receiving an original bitmap;
acquiring pixels of the original bitmap;
generating an array of pixels for the original bitmap;
judging, namely judging whether all pixels are processed;
if not, carrying out a color matching step on the pixels;
if so, a new bitmap is generated,
the color matching step comprises the following steps:
the step of fetching the RBG value of the current pixel and generating an index of the current pixel comprises the following steps: the RBG value of the current pixel and the full-white RBG value are subjected to difference, and a white difference value is generated; the RBG value of the current pixel and the full black RBG value are subjected to difference, and a black difference value is generated; when the absolute value of the white difference value is smaller than the absolute value of the black difference value, setting the index of the current pixel to be full white; when the absolute value of the black difference value is smaller than that of the white difference value, setting the index of the current pixel to be completely black;
the processing of the RBG value pixels of the peripheral pixels of the current pixel according to the RBG value of the current pixel, the index of the current pixel and the processing coefficient comprises the following steps: generating an RGB difference value, wherein the RGB difference value is the difference value between the RBG value of the current pixel and the index of the current pixel; adding the multiplied accumulation of the RGB difference and the processing coefficient to RGB values of the peripheral pixels;
preserving RBG values of the peripheral pixels;
returning to the step of determining as described above,
the lattice diagram conversion step comprises the following steps: generating a bitmap from the new bitmap, the step of generating a bitmap from the new bitmap comprising: the RBG value and the full-white RBG value of the pixel are subjected to difference, and a white difference value is generated; the RBG value of the pixel and the full black RBG value are subjected to difference, and a black difference value is generated; when the absolute value of the white difference value is smaller than the absolute value of the black difference value, setting a point in the pixel corresponding bitmap as a white point; when the absolute value of the black difference value is smaller than that of the white difference value, setting the point in the pixel corresponding bitmap as a black point;
the printing steps are as follows: and performing thermal printing according to the dot matrix image.
2. The printing method according to claim 1, characterized in that:
the pixel array is a one-dimensional array.
3. The printing method according to claim 1, characterized in that:
the processing coefficient is greater than 0 and less than 1.
4. The printing method according to claim 1, characterized in that:
the peripheral pixels include a right first pixel, a right second pixel, a lower first pixel, a lower second pixel, a lower left first pixel, and a lower right first pixel based on the current pixel.
5. A thermal printer comprising a processor for implementing the steps of the printing method according to any one of claims 1-4 when executing a computer program stored in a memory.
6. A computer-readable storage medium having stored thereon a computer program, characterized by: the computer program, when executed by a processor, implements the steps of the printing method according to any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710819425.9A CN107621929B (en) | 2017-09-12 | 2017-09-12 | Gray scale thermal printing method, thermal printer and readable storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710819425.9A CN107621929B (en) | 2017-09-12 | 2017-09-12 | Gray scale thermal printing method, thermal printer and readable storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107621929A CN107621929A (en) | 2018-01-23 |
| CN107621929B true CN107621929B (en) | 2023-07-14 |
Family
ID=61088282
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710819425.9A Active CN107621929B (en) | 2017-09-12 | 2017-09-12 | Gray scale thermal printing method, thermal printer and readable storage medium |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107621929B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110626078B (en) * | 2019-10-21 | 2020-09-22 | 威海哲文智能科技有限公司 | Thermal printing control method and thermal recording device |
| CN111556596B (en) * | 2020-04-28 | 2022-06-10 | 沈阳工业大学 | Writing device and method supporting private interaction |
| CN112508762A (en) * | 2020-10-20 | 2021-03-16 | 珠海泽冠科技有限公司 | Method for realizing gray scale printing of low-voltage thermal sensitive sheet |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0660586A2 (en) * | 1993-12-27 | 1995-06-28 | Sharp Kabushiki Kaisha | Methods of gradation control and picture quality improvement in thermal printer |
| US6172768B1 (en) * | 1998-02-05 | 2001-01-09 | Canon Kabushiki Kaisha | Halftoning with changeable error diffusion weights |
| JP2005079623A (en) * | 2003-08-28 | 2005-03-24 | Fuji Photo Film Co Ltd | Method, apparatus and program of correcting white balance |
| JP2005153161A (en) * | 2003-11-20 | 2005-06-16 | Alps Electric Co Ltd | Image recording method |
| CN1781722A (en) * | 2004-12-03 | 2006-06-07 | 株式会社Wedg | Image forming method and image forming apparatus |
| CN1955006A (en) * | 2005-10-26 | 2007-05-02 | 诚研科技股份有限公司 | Thermal accumulative process method for thermal transfer printer |
| JP2009141790A (en) * | 2007-12-07 | 2009-06-25 | Seiko Epson Corp | Image processing program and image processor |
| CN103049904A (en) * | 2012-11-30 | 2013-04-17 | 北京华夏力鸿商品检验有限公司 | Image extraction method and system, and electronic certificate making method and system |
| CN106681673A (en) * | 2016-12-21 | 2017-05-17 | 福建升腾资讯有限公司 | Grayscale printing method of thermosensitive printer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200716382A (en) * | 2005-10-19 | 2007-05-01 | Hi Touch Imaging Tech Co Ltd | Method of image processing for thermal printer's heat accumulation |
-
2017
- 2017-09-12 CN CN201710819425.9A patent/CN107621929B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0660586A2 (en) * | 1993-12-27 | 1995-06-28 | Sharp Kabushiki Kaisha | Methods of gradation control and picture quality improvement in thermal printer |
| US5721578A (en) * | 1993-12-27 | 1998-02-24 | Sharp Kabushiki Kaisha | Methods of gradation control and picture quality improvement in a thermal printer which adapts a staggered printing system |
| US6172768B1 (en) * | 1998-02-05 | 2001-01-09 | Canon Kabushiki Kaisha | Halftoning with changeable error diffusion weights |
| JP2005079623A (en) * | 2003-08-28 | 2005-03-24 | Fuji Photo Film Co Ltd | Method, apparatus and program of correcting white balance |
| JP2005153161A (en) * | 2003-11-20 | 2005-06-16 | Alps Electric Co Ltd | Image recording method |
| CN1781722A (en) * | 2004-12-03 | 2006-06-07 | 株式会社Wedg | Image forming method and image forming apparatus |
| CN1955006A (en) * | 2005-10-26 | 2007-05-02 | 诚研科技股份有限公司 | Thermal accumulative process method for thermal transfer printer |
| JP2009141790A (en) * | 2007-12-07 | 2009-06-25 | Seiko Epson Corp | Image processing program and image processor |
| CN103049904A (en) * | 2012-11-30 | 2013-04-17 | 北京华夏力鸿商品检验有限公司 | Image extraction method and system, and electronic certificate making method and system |
| CN106681673A (en) * | 2016-12-21 | 2017-05-17 | 福建升腾资讯有限公司 | Grayscale printing method of thermosensitive printer |
Non-Patent Citations (1)
| Title |
|---|
| 熊志勇 ; 王江晴 ; .基于三分量预测误差差值扩展的可逆数据隐藏.计算机应用.2010,(09),2408-2412. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107621929A (en) | 2018-01-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107621929B (en) | Gray scale thermal printing method, thermal printer and readable storage medium | |
| CN102682446B (en) | Adaptive combined two-sided filter is used to generate equipment and the method for dense depth map | |
| CN104835108B (en) | The method for generating visualization two dimensional code | |
| US11233921B2 (en) | Image processing apparatus that specifies edge pixel in target image using single-component image data | |
| CN111611192B (en) | Refreshing method of color screen reader, color screen reader and computer storage medium | |
| CN110945537B (en) | Training device, recognition device, training method, recognition method, and program | |
| CN106663311B (en) | System and method for increasing the locating depth of image | |
| US10200570B2 (en) | Image processing apparatus for performing reduction process to reduce amount of specific color material to be used | |
| US8369614B2 (en) | Edge control in a digital color image via tone and size dependent dilation of pixels | |
| US9436059B2 (en) | Using reflectance properties | |
| EP3446471B1 (en) | Selecting color states | |
| US7756353B2 (en) | Edge enhancement method for halftone image | |
| US9204011B1 (en) | Apparatus and method for extracting a background luminance map of an image, de-shading apparatus and method | |
| CN105376460A (en) | Image processing device, image processing method, and medium | |
| CN103716506A (en) | Image processing device and computer-readable medium | |
| US10339636B2 (en) | Image processing apparatus that specifies edge pixel in target image by calculating edge strength | |
| US9609171B2 (en) | Applying luminance conversion processing in accordance with image attribute information to improve edge detection and image data correction for pseudo halftone processing | |
| JP6944127B2 (en) | Image processing equipment, computer programs, and image processing methods | |
| JP2007079586A (en) | Image processor | |
| JP5480102B2 (en) | Image processing apparatus, image forming apparatus, and image processing method | |
| US10389909B2 (en) | Image processing apparatus that specifies edge pixel in target image using minimum and maximum component values of pixel value in target image data | |
| CN110851883B (en) | Equipment fingerprint generation method and device based on picture drawing | |
| JP3952188B2 (en) | Image interpolation apparatus, image interpolation method, and image interpolation program | |
| CN113704164A (en) | Refreshing method of color screen reader, color screen reader and computer storage medium | |
| CN110909843A (en) | Method, device, server and storage medium for modeling coded image |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240226 Address after: 519000 Zone G, second floor, No. 1 plant, No. 15, Nanping Pingbei Second Road, Xiangzhou District, Zhuhai City, Guangdong Province Patentee after: Zhuhai Baiyin automation equipment Co.,Ltd. Country or region after: China Address before: Building 5, No. 168 Yile Road, Pingsha Town, Zhuhai City, Guangdong Province, 519000 Patentee before: ZHUHAI SMARNET EQUIPMENT CO.,LTD. Country or region before: China |
|
| TR01 | Transfer of patent right |