TWI386037B - Image processing apparatus and method - Google Patents

Description

Image processing device and method

The present invention relates to an image processing apparatus and method, and more particularly to an image processing apparatus and method suitable for use in a display.

In recent years, due to the development of industry and commerce and social progress, the products provided are mainly aimed at convenience, reliability, and economic benefits. Therefore, the products currently being developed are more advanced than before and can contribute to society; in terms of electronic products, in recent years The industry has continuously developed a more economical and convenient liquid crystal display for use in electronic products, so that its operation and efficacy can be achieved with half the effort.

Due to the structural characteristics of the liquid crystal display, the liquid crystal display has certain defects in the display of characters, especially block characters. For example, texts with simple strokes and vertical strokes can be displayed well, but for strokes, texts with strokes, strokes, and the like tend to cause visual jaggedness (Jaggies). Be as round as handwriting.

It can be seen that the above-mentioned existing liquid crystal display obviously has inconveniences and defects, and needs to be further improved. In order to solve the problem of aliasing, the relevant fields have not exhausted their efforts to find a solution, but the method that has not been applied for a long time has been developed. Therefore, how to present a hand-like effect on the display is one of the current important research and development topics, and it has become an urgent need for improvement in related fields.

Accordingly, an aspect of the present invention is to provide an image processing apparatus for reducing the problem of aliasing to provide a user with a better visual experience.

According to an embodiment of the invention, an image processing apparatus is applicable to a display having a plurality of pixels arranged in a horizontal and vertical array of pixels, wherein each pixel includes at least three sub-pixels arranged in a lateral direction. The image processing device includes a sampling module and a calibration module. In use, the sampling module can acquire graphics; the calibration module can select sub-pixels matching the graphics from the pixel array, and then drive the selected sub-pixels to display graphics.

Thus, when the image processing apparatus of the embodiment is used, it can be recalculated according to the shape of the graphic to select the sub-pixels that match the pattern, so that the display shows a pattern that greatly reduces the sawtooth phenomenon, thereby exhibiting a rounded effect as a handwriting.

Another aspect of the present invention is to provide an image processing method for reducing the problem of aliasing.

According to another embodiment of the present invention, an image processing method is applicable to a display having a plurality of pixels arranged in a horizontal and vertical array of pixels, wherein each pixel includes at least three sub-pixels arranged in a lateral direction. The image processing method comprises the following steps: First, a graphic can be obtained; then, sub-pixels matching the pattern can be selected from the pixel array, and the selected sub-pixels are driven to display the graphic.

In this way, when the image processing method of the embodiment is executed, the sub-pixels matching the pattern can be re-calculated according to the shape of the graphic, so that the display shows a pattern that greatly reduces the sawtooth phenomenon, thereby exhibiting a rounded effect.

In order to make the description of the present invention more complete and complete, reference is made to the accompanying drawings and the accompanying drawings. On the other hand, well-known elements and steps are not described in the embodiments to avoid unnecessarily limiting the invention.

Please refer to FIG. 1. FIG. 1 is a schematic diagram of a pixel array configuration. As shown, the display 100 has a pixel array 130. The pixel array 130 is arranged in a plurality of pixels 110 in a lateral direction 120 and a vertical direction 122. Each of the pixels 110 includes at least three sub-pixels arranged in a lateral direction 120.

In the pixel array 130, one pixel 110 includes sub-pixels 112a, 114a, 116a arranged side by side in the lateral direction 120, the other pixel 110 includes sub-pixels 112b, 114b, 116b arranged side by side in the lateral direction 120, and the other pixel 110 contains sub-pixels side by side in the horizontal direction 120. 112c, 114c, 116c, the other pixel 110 includes sub-pixels 112d, 114d, 116d arranged side by side in the lateral direction 120, the other pixel 110 includes sub-pixels 112e, 114e, 116e arranged side by side in the lateral direction 120, and the other pixel 110 contains the side by side in the horizontal direction 120 The pixels 112f, 114f, 116f, the other pixels 110 include sub-pixels 112g, 114g, 116g arranged side by side in the lateral direction 120, and the further pixels 110 include sub-pixels 112h, 114h, 116h arranged side by side in the lateral direction 120, and the further pixels 110 are arranged side by side in the lateral direction 120. Sub-pixels 112i, 114i, 116i.

It should be understood that, in FIG. 1 , the number of pixels 110 in the pixel array 130 is merely an example, and is not intended to limit the present invention. Those skilled in the art should flexibly select the number of pixels according to actual needs. In practice, the more pixels in a unit area represent the higher the resolution, the clearer the displayed image will be.

In this embodiment, the sub-pixels in each of the pixels 110 are respectively a red sub-pixel, a green sub-pixel, and a blue sub-pixel. In other embodiments, a single pixel may include various types of sub-pixels, such as four-color sub-pixels such as enamel, purple, yellow, and black. Those skilled in the art should select elastic selection at that time.

In the present embodiment, the display 100 is a liquid crystal display. In other embodiments, display 100 can be a variety of displays in accordance with the pixel configuration described above, such as a cathode ray tube display, a plasma display, or the like.

In application, the display 100 can be installed in various electronic products, such as a computer, a mobile phone, a personal digital assistant, etc. Alternatively, the display 100 can be used as an independent display device, and those skilled in the art should flexibly select it at that time.

Please refer to FIG. 2A and FIG. 2B . FIG. 2A and FIG. 2B are respectively schematic diagrams of the display 100 of FIG. 1 when displaying graphics. Fig. 2A shows a horizontal line 210 and a vertical line 220; Fig. 2B shows a diagonal line 230. Each pixel of the display 100 can be divided into a red sub-pixel, a green sub-pixel, and a blue sub-pixel. For example, if a pixel displays white, the red, green, and blue sub-pixels of the pixel illuminate simultaneously.

In Fig. 2A, since the horizontal line 210 and the vertical line 220 of the display coincide with the regularity of the arrangement of the pixels in the pixel array, a good display effect is obtained.

In Fig. 2B, due to the limitation of the arrangement of pixels into a pixel array, a problem arises when a diagonal line 230 is displayed, which presents a sawtooth phenomenon (Jaggies) as shown in Fig. 2B. The so-called sawtooth refers to a diagonal line or object in the figure. The edge can be seen as a stepped first-order first-order non-smooth line, which is why the user usually sees some text through the general LCD display, which is visually uncomfortable. In general, liquid crystal displays tend to have aliasing when displaying diagonal lines.

In view of the above, an aspect of the present invention provides an image processing apparatus for reducing the sawtooth phenomenon exhibited by a line to provide a user with a better visual experience. The embodiment of the image processing apparatus will be specifically described below with reference to FIG.

Please refer to FIG. 3. FIG. 3 is a block diagram of an image processing apparatus 300 according to an embodiment of the present invention. The image processing device 300 can be applied to the above display 100 or widely used in related technical aspects. As shown, the image processing device 300 includes a sampling module 310 and a calibration module 320. The sampling module 310 can obtain at least one graphic. The calibration module 320 can select sub-pixels that match the pattern from the pixel array 130, thereby driving the selected sub-pixels to display graphics.

Thus, when the image processing apparatus 300 is used, it can be recalculated in accordance with the form of the pattern to select the sub-pixels that match the pattern, so that the display 100 displays a pattern that greatly reduces the sawtooth phenomenon, thereby exhibiting a rounded effect as a handwriting.

It has been explained in Fig. 1 that a pixel is composed of at least three sub-pixels, such as a red sub-pixel, a green sub-pixel and a blue sub-pixel. For example, the image processing apparatus 300 can map according to a 24-bit hexadecimal number encoding of one sub-pixel. If the white color corresponding to the white color code is 0xffffff, the digital code corresponding to black can be 0x000000, corresponding to The digit encoding in red may be 0xff0000, the digit encoding corresponding to green may be 0x00ff00, and the digit encoding corresponding to blue may be 0x0000ff. In practice, the form of the graphic stored in the computer is a combination of digital code corresponding to one pixel, and the image processing device 300 can separate the three sub-pixels of each pixel separately, and select the sub-pixel matching the graphic, so that 3 Each successive sub-pixel can be regarded as a picture element, instead of the pixels arranged in the matrix according to the geometric structure, so that the definition of the composed text can be improved by 300%.

In this embodiment, the sampling module 310 can read a recording medium (not shown) from a computer inside or outside the display 100 or obtain a graphic, such as a character graphic, through other media. For example, if the graphic is a character graphic, the text storage mode in the general storage device is still a pixel corresponding to a hexadecimal digit encoding, and does not split the stored data of each pixel according to multiple sub-pixels thereof. The pen storage data, the sampling module 310 can obtain the text according to the original storage mode, and then hand it to the calibration module 220 for processing.

In other embodiments, the sampling module 310 can obtain a drawing, an outline of an object, or the like, and those skilled in the art should flexibly select it at that time.

The sampling module 310 and the calibration module 320 can be a software program or a hardware circuit. Those skilled in the art should be able to flexibly choose their implementation at that time, without having to use all software programs or all hardware circuits, some of which are software programs or partially hardware circuits. In this embodiment, the sampling module 310 and the calibration module 320 can be software programs.

For a more detailed explanation of the effect of the image processing apparatus 300 in processing graphics, please refer to FIGS. 4A and 4B. 4A is a graphic 410 that has not been processed by the image processing device 300; FIG. 4B is a graphic 410 processed by the image processing device 300. In this embodiment, the graphics 410 are presented in the pixel array 430 in FIGS. 3A and 3B, wherein the pixel array 430 can serve as the pixel array 130; although the number of pixels in the 4A and 4B is more than The number of pixels in the pixel array 130 in FIG. 1 is substantially the same as the arrangement of the pixels and their sub-pixels in the pixel array 130 of FIG. 1 . 4B and 4A are optimized in the same resolution mode, so that the oblique line 410 of FIG. 3B is more rounded and smoother than the oblique line 410 of FIG. 3A; in terms of sharpness comparison, the oblique line of FIG. 3B The sharpness of 410 is two times greater than the sharpness of diagonal line 410 of Figure 3A.

In practice, ordinary Chinese characters are basically composed of horizontal lines, vertical lines, diagonal lines, and curves. The horizontal line and the vertical line basically have no display defects as described above, and the defects are oblique lines and curves. When the image processing apparatus is used, the resolution of the oblique line and the curve can be increased by 200% on the original basis, thereby being seen. The image processing device 300 has a very significant effect on the improvement of the sharpness of the character display.

In FIG. 3, the calibration module 320 can include a diagonal processing unit 322. In use, when the graphic has a diagonal line oblique to the horizontal or vertical direction, the oblique line processing unit 322 can analyze the coordinate value of the oblique line, and select the sub-pixel corresponding to the coordinate value of the oblique line from the pixel array 130 as the first group. Pixels, and sub-pixels adjacent to both sides of the first group of sub-pixels are selected in the horizontal direction.

For example, the oblique line processing unit 322 may first analyze the coordinate values of the start and end points of the oblique line, and then calculate the coordinate values of the points between the start point and the end point on the oblique line, thereby selecting the sub-pixel corresponding to the coordinate value of the oblique line and in the horizontal direction. Select subpixels located on either side of these subpixels.

In order to explain in more detail the manner in which the oblique line processing unit 322 processes the oblique lines, please refer to FIG. FIG. 5 is a schematic diagram of selecting sub-pixels of the display 100 of FIG. 1 by the oblique line processing unit 322 in accordance with an embodiment of the present invention. As shown, the oblique line processing unit 322 can analyze the coordinate values of the oblique lines, and select the sub-pixels 116a, 112e corresponding to the coordinate values of the oblique lines from the pixel array 130, and select the sub-pixels 114a, 112d on both sides of the horizontal sub-pixel 116a. And sub-pixels 116b, 114e on both sides of the sub-pixel 112e. As such, the sub-pixels 114a, 116a, 112d of the two adjacent pixels can be regarded as image elements; similarly, the sub-pixels 116b, 112e, 114e of the two adjacent pixels can be regarded as image elements.

In FIG. 3, the calibration module 320 can include a curve processing unit 324. In use, when the graphic has a curve, the curve processing unit 324 can analyze the coordinate value of the curve, according to which the sub-pixel corresponding to the coordinate value of the curve is selected from the pixel array 130 as a second group of sub-pixels, and the second Each of the three adjacent sub-pixels of the group of sub-pixels is treated as an image element.

In order to explain in more detail the manner in which the curve processing unit 324 processes the curve, please refer to FIGS. 6A, 6B, 6C, 6D, 6E, 6F, and 6G. 6A, 6B, 6C, 6D, 6E, 6F, and 6G are diagrams selected by the curve processing unit 324 of FIG. 3 in accordance with various embodiments of the present invention, respectively. A schematic representation of sub-pixels of display 100. In Fig. 6A, the curve processing unit 324 selects three sub-pixels 116b, 112e, 114e adjacent in the lateral direction as image elements. In Fig. 6B, the curve processing unit 324 selects three sub-pixels 112e, 114e, 116d adjacent in the lateral direction as image elements. In Fig. 6C, the curve processing unit selects three sub-pixels 112h, 114g, and 116g adjacent in the lateral direction as image elements. In Fig. 6D, the curve processing unit selects three sub-pixels 112i, 114h, 116g adjacent in the lateral direction as image elements. In Fig. 6E, the curve processing unit selects three sub-pixels 114e, 116f, 112i adjacent in the lateral direction as image elements. In Fig. 6F, the curve processing unit selects three sub-pixels 112b, 114b, 116c adjacent in the lateral direction as image elements. In Fig. 6G, the curve processing unit selects three sub-pixels 116a, 112e, 114f adjacent in the lateral direction as image elements.

In practice, if the curvature of the curve is too large, the vertical resolution cannot be further refined in the horizontal direction due to the physical structure of the display 100. Therefore, the sub-pixels corresponding to the excessive curvature in the curve may appear to be non-contiguous. situation. Therefore, in FIG. 3, the calibration module 320 can include a curve compensation unit 325. In use, when the second group of sub-pixels selected by the curve processing unit 324 has two spaced apart sub-pixels, the curve compensation unit 325 may select a sub-pixel adjacent to the two-phase spaced sub-pixels as a compensation sub-pixel. Subpixels adjacent to both sides of the two-phase spaced sub-pixels and sub-pixels adjacent to both sides of the compensation sub-pixel are laterally selected.

In order to explain in more detail the manner in which the curve compensation unit 325 compensates for the curve, please refer to FIG. Figure 7 is a schematic diagram showing the selection of the sub-pixels of the display 100 of Figure 1 by the curve compensation unit 325 of Figure 3, in accordance with an embodiment of the present invention. In Fig. 7, the manner of processing and compensating the curve is divided into three stages 710, 720, and 730. In the first stage 710, the sub-pixel selected by the curve processing unit includes two-phase spaced sub-pixels 112f, 114d; then, in the second stage 720, the curve compensating unit can select adjacent to the two-phase spaced sub-pixels 112f, 114d. The sub-pixel 114e serves as a compensation sub-pixel, and in the third stage 730, the curve compensation unit can further select the sub-pixels 116c, 114f on both sides of the sub-pixel 112f, the sub-pixels 112d, 116d and the sub-pixels on both sides of the sub-pixel 114d. Sub-pixels 112e, 116e on both sides of 114e. As such, the display 100 not only clearly displays the curve, but also is more rounded in places where the curvature is too large in the curve.

In FIG. 3, the calibration module 320 can include a vertical line processing unit 326. In use, when the graphic has a vertical line perpendicular to the horizontal direction, the vertical line processing unit 326 can analyze the coordinate value of the vertical line, and select a sub-pixel corresponding to the coordinate value of the vertical line from the pixel array 130 as a third. Sub-pixels are grouped, and sub-pixels adjacent to both sides of the third group of sub-pixels are selected laterally.

In practice, although the display 100 can display the vertical line without sawtooth in units of the original pixels 110, the sub-pixels reselected by the vertical line processing unit 326 enable the display 100 to display the vertical line orientation in the graphic. Better accuracy, without having to reconcile the existing pixel configuration with the vertical line slightly to the left or to the right.

In FIG. 3, the calibration module 320 can include a horizontal line processing unit 328. In use, when the graphic has a horizontal line perpendicular to the vertical direction, the horizontal line processing unit 328 can select a pixel matching the horizontal line from the pixel array 130 as a group of pixels, thereby selecting the sub-pixels included in the group pixel.

In practice, due to the physical structure of the display 100, further fine adjustment cannot be performed in the vertical direction when the horizontal line is displayed. Therefore, the horizontal line processing unit 328 can select a plurality of pixels matching the horizontal line directly in the horizontal direction, thereby selecting the pixels. The included sub-pixels.

In FIG. 3, the calibration module 320 can include a drive unit 329. In use, the drive unit 329 can drive the selected sub-pixels described above. In practice, the driving unit 329 can drive the sub-pixels selected by the oblique line processing unit 322, the curve processing unit 324, the curve compensation unit 325, the vertical line processing unit 326, and the horizontal line processing unit 328 synchronously or separately, whereby the display 100 These driven sub-pixels can be used to display graphics.

Another aspect of the present invention is to provide an image processing method for solving the problem of aliasing. The implementation of this image processing method will be specifically described below with reference to FIG.

Please refer to FIG. 8. FIG. 8 is a flowchart of an image processing method 800 according to another embodiment of the present invention. As shown, an image processing method 800 includes steps 810 and 820. It should be understood that the steps mentioned in the present embodiment can be adjusted according to actual needs, and can be performed simultaneously or partially simultaneously, unless the order is specifically stated. As for the hardware device for carrying out these steps, since the previous embodiment has been specifically disclosed, the description thereof will not be repeated.

The image processing method 800 can be applied to a display (such as the display 100 described above) or can be widely used in related technical aspects. The display may include a plurality of pixels arranged in a horizontal and vertical array of pixels, wherein each pixel includes at least three sub-pixels arranged in a lateral direction. At least one graphic may be obtained in step 810. In step 820, sub-pixels matching the pattern may be selected from the pixel array to drive the selected sub-pixels to display the graphic.

Thus, when the image processing method 800 is used, it can be recalculated according to the shape of the graphic to select the sub-pixels that match the pattern, so that the display shows a pattern that greatly reduces the sawtooth phenomenon, thereby exhibiting a rounded effect like a handwriting.

In this embodiment, in step 810, graphics, such as character graphics, etc., may be obtained from a storage device inside or outside the display or through other media. In other embodiments, a drawing, an outline of the object, or the like may be obtained at step 810, and the skilled artisan should select the elastic selection at that time.

In step 820, when the graphic has a diagonal line oblique to the horizontal or vertical direction, the coordinate value of the oblique line is analyzed, and the sub-pixel corresponding to the coordinate value of the oblique line is selected from the pixel array as the first group of sub-pixels, and is selected in the horizontal direction. Subpixels adjacent to both sides of the first set of sub-pixels.

In step 820, when the graph has a curve, the coordinate value of the curve is analyzed, and the sub-pixel corresponding to the coordinate value of the curve is selected from the pixel array as the second group of sub-pixels, and each of the second group of sub-pixels The adjacent sub-pixels are treated as one image element. In addition, when there are two spaced apart sub-pixels in the second group of sub-pixels, the sub-pixels adjacent to the two-phase spaced sub-pixels are selected as a compensating sub-pixel, and are laterally selected adjacent to the two-phase spaced sub-pixels. Subpixels and subpixels adjacent to both sides of the compensation subpixel.

In step 820, when the graphic has a vertical line perpendicular to the horizontal direction, the coordinate value of the vertical line is analyzed, and the sub-pixel corresponding to the coordinate value of the vertical line is selected from the pixel array as the third group of sub-pixels, and is horizontally Subpixels adjacent to both sides of the third set of subpixels are selected.

In step 820, when the graphic has a horizontal line perpendicular to the vertical direction, the pixel matching the horizontal line is selected from the pixel array as a group of pixels, thereby selecting the sub-pixels included in the group of pixels.

In step 820, the selected sub-pixels can be driven. More specifically, in step 820, sub-pixels selected corresponding to oblique lines, curves, curve compensation, vertical lines, and horizontal lines may be driven synchronously or separately, whereby the display may transmit graphics through the driven sub-pixels.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100. . . monitor

110. . . Pixel

112a, 114a, 116a. . . Subpixel

112b, 114b, 116b. . . Subpixel

112c, 114c, 116c. . . Subpixel

112d, 114d, 116d. . . Subpixel

112e, 114e, 116e. . . Subpixel

112f, 114f, 116f. . . Subpixel

112g, 114g, 116g. . . Subpixel

112h, 114h, 116h. . . Subpixel

112i, 114i, 116i. . . Subpixel

120. . . Landscape

122. . . Portrait

130. . . Pixel array

210. . . Horizontal line

220. . . Vertical line

230. . . Slash

300. . . Image processing device

310. . . Sampling module

320. . . Tuning module

322. . . Slash processing unit

324. . . Curve processing unit

325. . . Curve compensation unit

326. . . Vertical line processing unit

328. . . Horizontal line processing unit

329. . . Drive unit

410. . . Graphics

430. . . Pixel array

710. . . The first stage

720. . . second stage

730. . . The third stage

800. . . Image processing method

810. . . step

820. . . step

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood.

Figure 1 is a schematic diagram of a pixel array configuration.

Fig. 2A and Fig. 2B are schematic diagrams showing the simulation of the display of Fig. 1 when the graphic is displayed.

Figure 3 is a block diagram of an image processing apparatus in accordance with an embodiment of the present invention.

Fig. 4A is a diagram processed without the image processing apparatus of Fig. 3.

Fig. 4B is a diagram processed by the image processing apparatus of Fig. 3.

Figure 5 is a schematic diagram showing the selection of sub-pixels of the display of Figure 1 in a diagonal line processing unit of Figure 3, in accordance with an embodiment of the present invention.

6A, 6B, 6C, 6D, 6E, 6F, and 6G are the displays of FIG. 1 selected by the curve processing unit of FIG. 3 in accordance with various embodiments of the present invention, respectively. Schematic diagram of the sub-pixels.

Figure 7 is a schematic diagram showing the selection of sub-pixels of the display of Figure 1 by the curve compensation unit of Figure 3, in accordance with an embodiment of the present invention.

Figure 8 is a flow chart of an image processing method in accordance with another embodiment of the present invention.

130. . . Pixel array

300. . . Image processing device

310. . . Sampling module

320. . . Tuning module

322. . . Slash processing unit

324. . . Curve processing unit

325. . . Curve compensation unit

326. . . Vertical line processing unit

328. . . Horizontal line processing unit

329. . . Drive unit

Claims (18)

An image processing apparatus is applicable to a display, wherein the display comprises a plurality of pixels arranged in a horizontal and vertical direction, wherein each of the pixels comprises at least three sub-pixels arranged in the horizontal direction, and the image processing apparatus comprises at least: a sampling module for acquiring at least one graphic; and a calibration module for selecting a sub-pixel matching the graphic from the pixel array, thereby driving the selected sub-pixels to display the graphic, wherein the calibration The module further includes: a diagonal line processing unit configured to analyze a coordinate value of the oblique line when the graphic has a slope oblique to the horizontal direction or the vertical oblique line, and select a sub-corresponding to the coordinate value of the oblique line from the pixel array The pixels are treated as a set of sub-pixels, and sub-pixels adjacent to both sides of the set of sub-pixels are selected as one-image elements in the lateral direction. The image processing device of claim 1, wherein the calibration module further comprises: a curve processing unit, configured to analyze a coordinate value of the curve when the graphic has a curve, and select and select from the pixel array The coordinate value of the curve corresponds to a sub-pixel as a set of sub-pixels, and each of the three sub-pixels adjacent to the set of sub-pixels is regarded as a picture element. The image processing device of claim 2, wherein the calibration module further comprises: a curve compensation unit for having two phase intervals in the group of sub-pixels Sub-pixels adjacent to the two-phase spaced sub-pixels are selected as a compensating sub-pixel, and sub-pixels adjacent to both sides of the two-phase spaced sub-pixel are adjacent to the horizontal direction and adjacent to the compensating sub-pixel Side subpixels. The image processing device of claim 1, wherein the calibration module further comprises: a vertical line processing unit configured to analyze a coordinate value of the vertical line when the graphic has a vertical line perpendicular to the horizontal direction, A sub-pixel corresponding to a coordinate value of the vertical line is selected from the pixel array as a set of sub-pixels, and sub-pixels adjacent to both sides of the set of sub-pixels are selected as one image element according to the horizontal direction. The image processing device of claim 1, wherein the calibration module further comprises: a horizontal line processing unit, configured to select from the pixel array when the graphic has a horizontal line perpendicular to the vertical direction The line-matched pixels are used as a set of pixels to select the sub-pixels included in the set of pixels. The image processing device of any one of claims 2 to 5, wherein the calibration module further comprises: a driving unit for driving the selected sub-pixels. The image processing device of claim 1, wherein the sampling module is configured to obtain at least one character graphic as the graphic. The image processing device of claim 1, wherein the sub-pixels included in each of the pixels in the display are red sub-pixels, green sub-pixels, and blue sub-pixels. The image processing device according to claim 1, wherein the display is a liquid crystal display. An image processing method is applicable to a display, wherein the display comprises a plurality of pixels arranged in a horizontal and vertical direction, wherein each of the pixels comprises at least three sub-pixels arranged in the horizontal direction, and the image processing method comprises at least the following steps. : (a) obtaining at least one graphic; and (b) selecting sub-pixels from the pixel array that match the pattern, thereby driving the selected sub-pixels to display the graphic, when the graphic has an inclination to the horizontal or vertical When the oblique line is used, the coordinate value of the oblique line is analyzed, and the sub-pixel corresponding to the coordinate value of the oblique line is selected from the pixel array as a set of sub-pixels, and the sub-pixels adjacent to both sides of the set of sub-pixels are selected in the horizontal direction. As a picture element. The image processing method of claim 10, wherein the step (b) further comprises: when the graphic has a curve, analyzing a coordinate value of the curve, and selecting a sub-pixel corresponding to the coordinate value of the curve from the pixel array. As a set of sub-pixels, and each of the set of sub-pixels is adjacent to the horizontal direction The sub-pixels are treated as an image element. The image processing method of claim 11, wherein the step (b) further comprises: when the group of sub-pixels has two spaced-apart sub-pixels, selecting sub-pixels adjacent to the two-phase spaced sub-pixels as a compensation a sub-pixel, and sub-pixels adjacent to both sides of the two-phase spaced sub-pixel and sub-pixels adjacent to both sides of the compensating sub-pixel are selected in the horizontal direction. The image processing method of claim 10, wherein the step (b) further comprises: when the graphic has a vertical line perpendicular to the horizontal direction, analyzing a coordinate value of the vertical line, thereby selecting from the pixel array The coordinate values of the vertical lines correspond to the sub-pixels as a set of sub-pixels, and the sub-pixels adjacent to both sides of the set of sub-pixels are selected as one image element according to the horizontal direction. The image processing method of claim 10, wherein the step (b) further comprises: when the graphic has a horizontal line perpendicular to the vertical direction, selecting a pixel matching the horizontal line from the pixel array as a group of pixels In order to select the sub-pixels included in the set of pixels. The image processing method according to any one of claims 11 to 14, wherein the step (b) further comprises: The selected sub-pixels are driven. The image processing method of claim 10, wherein the step (a) comprises obtaining at least one character graphic. The image processing method according to claim 10, wherein the sub-pixels included in each of the pixels in the display are red sub-pixels, green sub-pixels, and blue sub-pixels, respectively. The image processing method according to claim 10, wherein the display is a liquid crystal display.