CN115576517A - Character display method, device, equipment and storage medium - Google Patents
Character display method, device, equipment and storage medium Download PDFInfo
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- CN115576517A CN115576517A CN202211394811.5A CN202211394811A CN115576517A CN 115576517 A CN115576517 A CN 115576517A CN 202211394811 A CN202211394811 A CN 202211394811A CN 115576517 A CN115576517 A CN 115576517A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
- G06F3/147—Digital output to display device ; Cooperation and interconnection of the display device with other functional units using display panels
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3433—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices
- G09G3/344—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using light modulating elements actuated by an electric field and being other than liquid crystal devices and electrochromic devices based on particles moving in a fluid or in a gas, e.g. electrophoretic devices
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The embodiment of the application discloses a character display method, a character display device, a character display equipment and a storage medium. According to the technical scheme, at least one target pixel is determined in the anti-aliasing layer data of the first font data, the first gray value of each target pixel is adjusted to the corresponding second gray value according to the set gray mapping relation, the second font data is obtained, the ink screen is driven to display the corresponding characters to be displayed based on the second font data, the contrast between the anti-aliasing layer of the characters to be displayed and the background is higher due to the fact that the first gray value of the target pixel in the anti-aliasing layer data is adjusted to the second gray value which is larger in distance with the gray value of the background gray, smooth transition of the character edge is guaranteed, the character display definition is effectively improved, and the character display effect on the ink screen is optimized.
Description
Technical Field
The embodiment of the application relates to the technical field of display, in particular to a character display method, a character display device, a character display equipment and a storage medium.
Background
The electronic ink screen achieves a display effect close to that of the conventional paper using an electrophoresis technique, and thus is also called "electronic paper". The electronic ink screen generally displays images through electronic ink, and the electronic ink is usually made into an electronic ink film, and the electronic ink film is composed of a large number of microcapsules, and pigment particles with different charges are arranged in the microcapsules. In the initial state, the pigment particles are suspended in the microcapsules, and when an electric field in a certain direction is applied, the corresponding pigment particles are pushed to the top, the microcapsules can display different colors, and the microcapsules with different colors form various characters and patterns.
Generally, when characters are displayed on a display screen, due to the limitation of the resolution of the display screen, the edges of the characters are in a sawtooth shape, and anti-sawtooth processing needs to be performed on the characters. Anti-aliasing generally adjusts color values of pixels at the edge of a font to enable a transition and gradual change effect to occur between the edge of the font and the background, so that the display of the edge of the font is smoother. However, the existing font anti-aliasing processing is generally designed for a color display screen, and when characters are subjected to anti-aliasing processing in an electronic ink screen, the edges of the characters are prone to have gray-like color, so that the characters are displayed in a fuzzy manner, and the character display effect is poor.
Disclosure of Invention
The embodiment of the application provides a character display method, a character display device and a storage medium, and aims to solve the technical problems that character display blurring and a character display effect are easy to occur when anti-aliasing processing is performed on characters in the prior art, effectively improve character display definition and guarantee the character display effect.
In a first aspect, an embodiment of the present application provides a text display method, including:
determining first font data of characters to be displayed, and determining at least one target pixel in anti-aliasing layer data of the first font data, wherein the first font data comprises the anti-aliasing layer data and font layer data;
determining a second gray value corresponding to the first gray value of at least one target pixel based on a set gray mapping relation, wherein the gray value distance between the second gray value and the background gray value of the character to be displayed is greater than the gray value distance between the first gray value and the background gray value;
adjusting a first gray value of at least one target pixel in the first font data to a corresponding second gray value to obtain second font data;
and driving an ink screen to display the characters to be displayed based on the second font datum.
In a second aspect, an embodiment of the present application provides a text display apparatus, including a target determination module, a grayscale mapping module, a grayscale adjustment module, and a text display module, where:
the target determining module is used for determining first font data of characters to be displayed and determining at least one target pixel in anti-aliasing layer data of the first font data, wherein the first font data comprises anti-aliasing layer data and font layer data;
the gray mapping module is configured to determine, based on a set gray mapping relationship, a second gray value corresponding to a first gray value of at least one target pixel, where a gray value distance between the second gray value and a background gray value of the text to be displayed is greater than a gray value distance between the first gray value and the background gray value;
the gray level adjusting module is used for adjusting a first gray level value of at least one target pixel in the first font data to a corresponding second gray level value to obtain second font data;
and the character display module is used for driving an ink screen to display the characters to be displayed based on the second font data.
In a third aspect, an embodiment of the present application provides a text display device, including: a memory and one or more processors;
the memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the text display method of the first aspect.
In a fourth aspect, embodiments of the present application provide a storage medium storing computer-executable instructions for performing the text display method according to the first aspect when executed by a computer processor.
According to the embodiment of the application, at least one target pixel is determined in the anti-aliasing layer data of the first font data, the first gray value of each target pixel is adjusted to the corresponding second gray value according to the set gray mapping relation, the second font data is obtained, the ink screen is driven to display the corresponding characters to be displayed based on the second font data, the first gray value of the target pixel in the anti-aliasing layer data is adjusted to the second gray value which is larger in distance with the gray value of the background gray, the contrast ratio of the anti-aliasing layer of the characters to be displayed to the background is higher, smooth transition of the character edge is guaranteed, the character display definition is effectively improved, and the character display effect on the ink screen is optimized.
Drawings
Fig. 1 is a flowchart of a text display method according to an embodiment of the present application;
FIG. 2 is a flow chart of another text display method provided in the embodiments of the present application;
FIG. 3 is a schematic diagram illustrating a display effect of performing antialiasing on text that is not to be displayed according to an embodiment of the present application;
fig. 4 is a schematic view of a display effect of performing display optimization processing on characters not to be displayed according to an embodiment of the present application;
fig. 5 is a schematic view of a display effect of performing display optimization processing on characters to be displayed according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a text display device according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a text display device according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, specific embodiments of the present application are described in detail below with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the application and are not limiting of the application. It should be further noted that, for the convenience of description, only some but not all of the relevant portions of the present application are shown in the drawings. Before discussing exemplary embodiments in greater detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently, or simultaneously. In addition, the order of the operations may be re-arranged. The above process may be terminated when its operations are completed, but may have additional steps not included in the figures. The processes described above may correspond to methods, functions, procedures, subroutines, and the like.
Fig. 1 is a flowchart of a text display method according to an embodiment of the present application, where the text display method according to the embodiment of the present application may be executed by a text display device, and the text display device may be implemented by hardware and/or software and integrated in a text display device.
The following description will be made by taking a method for executing text display by a text display device as an example. Referring to fig. 1, the text display method includes:
s101: determining first font data of a character to be displayed, and determining at least one target pixel in anti-aliasing layer data of the first font data, wherein the first font data comprises the anti-aliasing layer data and font layer data.
The first font datum provided by the scheme comprises an anti-sawtooth layer datum and a font layer datum. When the characters to be displayed are displayed according to the original anti-aliasing layer data and the font layer data in the first font data, the characters to be displayed are drawn and displayed based on the positions and the color values of all pixels reflected in the font layer data and the positions and the color values of all pixels reflected in the anti-aliasing layer data, correspondingly, the displayed characters comprise a font layer obtained by drawing based on the font layer data and an anti-aliasing layer obtained by drawing based on the anti-aliasing layer data, and the font layer and the anti-aliasing layer jointly form the displayed characters.
The anti-aliasing layer data can be obtained by anti-aliasing processing of the font corresponding to the character to be displayed based on a set anti-aliasing algorithm, and the color value of the pixel corresponding to the anti-aliasing layer is transited between the font and the color of the character background so as to realize the display effect of character smooth transition. Because the existing anti-aliasing algorithm is designed based on a color display screen, namely the existing anti-aliasing algorithm is not suitable for gray level images displayed in an ink screen by adjusting the original color values (such as RGB values) of fonts, characters are directly displayed on the ink screen according to an anti-aliasing processing result, the phenomena of gray edge display and fuzzy font outline of the characters are easy to occur, the character display definition is insufficient, and the text readability is influenced. According to the scheme, the color value of the target pixel determined in the anti-aliasing layer data is adjusted to be in a range with larger contrast ratio with the background gray scale, so that the contrast ratio of the anti-aliasing layer and the character background is improved, the outline of the character pattern is clearer, the character display definition is improved, and the readability of the text is ensured.
Illustratively, when the characters to be displayed need to be displayed, first font data corresponding to the characters to be displayed are obtained, and at least one target pixel is determined in anti-aliasing layer data of the first font data. Alternatively, the target pixel may be all pixels in the anti-aliasing layer data, or may be a part of pixels in the anti-aliasing layer data. In one possible embodiment, when a part of pixels in the anti-aliasing layer data are used as target pixels, the target pixels may be filtered from the anti-aliasing layer data according to a set filtering density or filtering number.
S102: and determining a second gray value corresponding to the first gray value of at least one target pixel based on the set gray mapping relation, wherein the gray value distance between the second gray value and the background gray value of the character to be displayed is greater than the gray value distance between the first gray value and the background gray value.
The background gray scale can be understood as the gray scale of the background when displaying the characters, and generally, a certain difference is kept between the gray scale of the characters and the background gray scale so as to ensure the contrast between the characters and the background and ensure the character display effect. Generally, the text color is opposite to the background color or two colors with distinct differences, for example, when the text is displayed on an ink screen, the text color may be black when the background color is a white background, and the text color may be white when the background color is a black background. Optionally, the text background may be set to light text when the text background is a dark background, and may be set to dark text when the text background is a light background. For example, when the text background is white or light gray background, the displayed text may be black or dark gray text, and correspondingly, when the text background is black or dark gray background, the displayed text may be white or light gray text.
The gray scale mapping relation provided by the scheme is used for recording the mapping relation between the set first gray scale value and the second gray scale value, namely the second gray scale value corresponding to the first gray scale value can be determined based on the gray scale mapping relation. Alternatively, the gray scale mapping relationship may be represented by a table, a formula, a graph, or the like. And the distance between the second gray value recorded in the gray mapping relation and the gray value of the background gray value is larger than the distance between the corresponding first gray value and the gray value of the background gray value, and at the moment, the target pixel and the character background are displayed according to the second gray value. In one embodiment, the first glyph data includes a plurality of glyph pixels that form the middle stroke of the character to be displayed, and the difference between the second grayscale value and the background grayscale value is not greater than the difference between the grayscale values of the glyph pixels in the first glyph data and the background grayscale value (i.e., the grayscale value corresponding to the optimized anti-aliasing layer data is closer to the grayscale value corresponding to the background than the grayscale value corresponding to the glyph data).
Illustratively, a first gray scale value corresponding to each target pixel is determined, and a second gray scale value corresponding to each first gray scale value is determined based on the set gray scale mapping relation. In the scheme, the distance between the determined second gray value and the gray value of the background gray value of the character to be displayed is larger than the distance between the corresponding first gray value and the gray value of the background gray value.
For example, when the first gray-scale value of the target pixel is not greater than the background gray-scale value, the corresponding second gray-scale value is less than the first gray-scale value, or when the first gray-scale value of the target pixel is not less than the background gray-scale value, the corresponding second gray-scale value is greater than a gray-scale value, that is, the difference between the second gray-scale value of the target pixel and the background gray-scale value is greater than the difference between the first gray-scale value of the target pixel and the background gray-scale value. At this time, the contrast between the target pixel displayed based on the second gray scale value and the text background is greater than the contrast between the target pixel displayed based on the first gray scale value and the text background, and the definition of the target pixel displayed based on the second gray scale value is higher.
S103: and adjusting the first gray value of at least one target pixel in the first font data to a corresponding second gray value to obtain second font data.
Illustratively, after the second gray value corresponding to each target pixel is determined, the first gray value of the target pixel is adjusted to the corresponding second gray value, so as to obtain second font data corresponding to the text to be displayed. At this time, the second glyph data includes glyph layer data and anti-aliasing layer data that replaces the first grayscale value of the target pixel with a second grayscale value.
In one possible embodiment, the pixels corresponding to the glyph layer data include middle pixels of text located in the middle of the text (e.g., in the middle of a text stroke), and the pixels corresponding to the anti-aliasing layer data include edge pixels of text located at the edge of the text (e.g., at the edge of a text stroke) and partial middle pixels of text. It can be understood that, if the target pixel includes a text middle pixel and a text edge pixel, when the background color is white (if the ink screen supports 16-level gray scale display, when the background color is white, the gray value of the text background is 15), the gray value of the text middle pixel is smaller than the gray value of the text edge pixel, and the color appears darker. When the background color is black (if the ink screen supports 16-level gray scale display, when the background color is black, the gray value of the character background is 0), the gray value of the middle pixel of the character is larger than the gray value of the edge pixel of the character, the color appears lighter, the gray value of the edge pixel of the character can be mapped into dark gray, the anti-aliasing gray scale is reserved, and the jaggy of the edge of the character is reduced.
S104: and driving the ink screen to display the characters to be displayed based on the second font datum.
Illustratively, a corresponding driving waveform signal is generated based on the determined second font datum, and the ink screen is driven to display the characters to be displayed based on the driving waveform signal. At this time, the color value displayed by each pixel point of the character to be displayed on the screen pixel point of the ink screen is determined by the anti-aliasing layer data in the second font data and the gray value corresponding to the font layer data. The gray value corresponding to the font layer data is consistent with the gray value determined initially, the display effect of the middle part of the character stroke is kept unchanged, the difference value between the second gray value corresponding to the target pixel in the anti-aliasing layer data and the gray value of the character background is larger than the difference value between the original first gray value and the gray value of the character background, the anti-aliasing effect on the edge of the character is kept, meanwhile, the situation that the edge of the character after anti-aliasing processing displays partial gray is reduced, and the display effect of the character after anti-aliasing processing is ensured.
Optionally, the driving waveform signal may be generated based on a set waveform file (waveform file), where a waveform sequence corresponding to conversion between different color values (gray values) (i.e., driving one color value on a screen pixel to another color value) is recorded in the waveform file, and each waveform sequence includes a plurality of driving frames arranged according to a set order. According to the driving sequence, when the screen pixels corresponding to the ink screen are sequentially driven according to the driving frames (the driving of the screen pixels can be applied through the thin film transistors corresponding to the driving screen pixels, for example, a voltage corresponding to a key driving frame is applied to the corresponding thin film transistors, so that the pigment particles move to the specified positions), the screen pixels undergo a corresponding intermediate process of color change, and after the driving of a plurality of driving frames is sequentially completed, the screen pixels convert the current display color to the target color, for example, the current display color of the screen pixels is converted to a second gray value corresponding to the target pixels in the anti-aliasing layer data, or gray values corresponding to pixels in the glyph layer data.
The method comprises the steps of determining at least one target pixel in anti-aliasing layer data of the first font data, adjusting the first gray value of each target pixel to be a corresponding second gray value according to a set gray mapping relation to obtain second font data, and driving the ink screen to display corresponding characters to be displayed based on the second font data.
On the basis of the foregoing embodiment, fig. 2 is a flowchart of another text display method provided in the embodiment of the present application, which is an embodiment of the text display method. Referring to fig. 2, the text display method includes:
s201: determining first font information corresponding to characters to be displayed according to a set font file, wherein the font file records font information corresponding to different characters.
S202: and drawing the first font data of the character to be displayed based on the first font information, the set font parameters and the anti-aliasing parameters.
The font file provided by the scheme records font information corresponding to different characters, and the corresponding character outline can be drawn based on the outline of the characters reflected by the font information. The font parameters can be used for setting the font size of the characters to be displayed, and the anti-aliasing parameters are used for representing the character anti-aliasing effect corresponding to the anti-aliasing processing of the characters to be displayed.
Exemplarily, after determining the to-be-displayed characters to be displayed, determining first font information corresponding to the to-be-displayed characters in a font file, determining font parameters and anti-aliasing parameters corresponding to the to-be-displayed characters, and drawing to obtain first font data of the to-be-displayed characters based on the first font information, the set font parameters and the anti-aliasing parameters.
For example, the initial font data of the character to be displayed is drawn according to the first font information and the set font parameters, anti-aliasing processing is performed on the initial font data based on the character anti-aliasing effect required by the anti-aliasing parameters, the initial font data is divided into anti-aliasing layer data and font layer data, a first gray value corresponding to each pixel in the anti-aliasing layer data is determined, and the first font data comprising the anti-aliasing layer data and the font layer data is obtained. The pixels corresponding to the anti-aliasing layer data can be pixels on the inner edge and/or the outer edge of the character to be displayed in the initial font data, and can also be pixels close to the inner edge and/or the outer edge of the character to be displayed in the character background.
S203: at least one pixel is determined as a target pixel from one or more anti-aliasing-layer data of the first glyph data, the first glyph data comprising the anti-aliasing-layer data and glyph-layer data.
The first font datum provided by the scheme can be one or more anti-aliasing layer data corresponding to the inner edge and/or the outer edge of the character to be displayed. When the character to be displayed is subjected to anti-aliasing processing, the inner edge and/or the outer edge of the character to be displayed can be subjected to anti-aliasing processing respectively, and one or more anti-aliasing layer data corresponding to the inner edge and/or the outer edge are obtained correspondingly.
Illustratively, at least one pixel is determined as a target pixel from one or more anti-aliasing layer data of the first glyph data. Optionally, one or more pixels in a part of the anti-aliasing layer may be used as target pixels, or all pixels of all the anti-aliasing layer data may be used as target pixels, that is, mapping and adjusting the first gray value are performed on all the anti-aliasing layer data, so that the display effect of the anti-aliasing layer is adjusted synchronously as a whole, and the text display effect is improved. S204: and determining a second gray value corresponding to the first gray value of at least one target pixel based on the set gray mapping relation, wherein the gray value distance between the second gray value and the background gray value of the character to be displayed is greater than the gray value distance between the first gray value and the background gray value.
In one possible embodiment, whether the second gray value is determined to be greater than the first gray value or less than the first gray value based on the set gray mapping relationship may be determined according to a comparison between the first gray value and a background gray value of the text background, and each gray mapping relationship is provided with a corresponding first mapping relationship and a corresponding second mapping relationship, where the second gray value determined based on the first gray mapping relationship is less than the corresponding first gray value, and the second gray value determined based on the second gray mapping relationship is greater than the corresponding first gray value. Based on this, when determining the second gray scale value corresponding to the first gray scale value of the at least one target pixel based on the set gray scale mapping relationship, the method includes:
s2041: and under the condition that the first gray value is smaller than the background gray value of the character to be displayed, determining a second gray value corresponding to the first gray value of at least one target pixel based on the set first gray mapping relation, wherein the second gray value determined based on the first gray mapping relation is smaller than the corresponding first gray value.
S2042: and under the condition that the first gray value is larger than the background gray value of the character to be displayed, determining a second gray value corresponding to the first gray value of at least one target pixel based on a set second gray mapping relation, wherein the second gray value determined based on the second gray mapping relation is larger than the corresponding first gray value.
The gray mapping relation provided by the scheme comprises a first gray mapping relation and a second gray mapping relation, wherein a second gray value recorded in the first gray mapping relation is smaller than a corresponding first gray value, and a second gray value recorded in the second gray mapping relation is larger than a corresponding first gray value, namely when the second gray value is determined based on the first gray mapping relation, the second gray value obtained through mapping is smaller than the corresponding first gray value, the color of the anti-aliasing layer of the font becomes dark, and when the second gray value is determined based on the second gray mapping relation, the second gray value obtained through mapping is larger than the corresponding first gray value, and the color of the anti-aliasing layer of the font becomes light.
For example, when the first grayscale value of the target pixel is smaller than the grayscale value of the background of the text to be displayed, and the color of the background of the text is lighter than the color of the displayed text (for example, in the case of white text background and black text), the second grayscale value corresponding to the first grayscale value of the target pixel is determined based on the set first grayscale mapping relationship, where the second grayscale value of each target pixel is smaller than the first grayscale value, the color of the target pixel becomes darker, the difference between the grayscale value of the target pixel and the grayscale of the background is enlarged, and the contrast between the target pixel and the light-colored text background is enlarged.
When the first gray value of the target pixel is greater than the gray value of the background of the character to be displayed, and the color of the character background is darker than the color of the displayed character (for example, the case of a black character background and a white character), a second gray value corresponding to the first gray value of the target pixel is determined based on a set second gray mapping relationship, and the second gray value of each target pixel is greater than the first gray value, so that the color of the target pixel becomes lighter, the difference between the gray value of the target pixel and the gray value of the background is enlarged, and the contrast between the target pixel and the dark character background is enlarged.
S205: and adjusting the first gray value of at least one target pixel in the first font data to a corresponding second gray value to obtain second font data.
S206: and driving the ink screen to display the characters to be displayed based on the second font data.
As shown in the schematic diagram of the display effect of performing the anti-aliasing process on the text to be displayed, which is provided in fig. 3, the display effect of the text to be displayed without performing the anti-aliasing process is shown, which is limited by the resolution of the ink screen, and the inner edge and the outer edge of the text to be displayed on the ink screen have a plurality of triangular serrations, so that the text display effect is poor. As shown in the schematic diagram of the display effect of performing display optimization processing on characters to be displayed, which is provided in fig. 4, after performing anti-aliasing processing on the characters to be displayed based on an anti-aliasing algorithm, the edges of the characters to be displayed are subjected to softening transition processing, and thus the font edges are gray, the font display is unclear, and the text readability is affected.
As shown in the schematic view of the display effect of performing display optimization processing on a text to be displayed, which is provided in fig. 5, after performing anti-aliasing processing on the text to be displayed based on an anti-aliasing algorithm to determine first font data, further determining a target pixel from anti-aliasing layer data of the first font data, adjusting a first gray value of the target pixel to a corresponding second gray value based on a set gray mapping relationship, enlarging a gray value difference between each pixel of the anti-aliasing layer and a text background, improving a contrast ratio of the anti-aliasing layer with respect to the text background, while retaining an anti-aliasing effect on an edge of the text, reducing a situation that the edge of the text after the anti-aliasing processing displays gray-bias, and ensuring the display effect of the text after the anti-aliasing processing.
The method comprises the steps of determining at least one target pixel in the anti-aliasing layer data of the first font data, adjusting the first gray value of each target pixel to be the corresponding second gray value according to the set gray mapping relation to obtain the second font data, and driving the ink screen to display the corresponding character to be displayed based on the second font data. Meanwhile, a proper gray mapping relation is determined based on the comparison condition of the background gray values of different character backgrounds and the first gray values of the target pixels, the second gray value corresponding to the first gray value of each target pixel is more accurately determined, the difference value between the gray value of the target pixel and the background gray value is enlarged, the contrast ratio of the target pixel and the light-color character background is effectively enhanced, and the display effect after character anti-aliasing processing is optimized. And an anti-aliasing algorithm does not need to be designed aiming at the ink screen again, so that the development cost is effectively reduced, the gray mapping relation corresponding to different scenes and ink screen configurations is adaptable, and the flexibility of displaying characters on the ink screen is improved.
In a possible embodiment, before determining, based on the set gray-scale mapping relationship, a second gray-scale value corresponding to the first gray-scale value of the at least one target pixel, the text display method provided by the present disclosure further includes: determining a gray mapping relation based on one or more combinations of character parameter information corresponding to characters to be displayed, background color information corresponding to the characters to be displayed, background gray values corresponding to the characters to be displayed, equipment version information of an ink screen, screen parameter information of the ink screen, a refreshing mode of the ink screen, environment information of the environment where the ink screen is located, and a function configuration state set by a user or a system.
For example, the present solution may set different gray mapping relationships for one or more combinations of different text parameter information, background color information, background gray value, device version information, screen parameter information, refresh mode, environment information, and function configuration state.
When the second gray scale value corresponding to the target pixel needs to be determined, the currently applicable gray scale mapping relationship is determined from the set multiple gray scale mapping relationships based on one or more combinations of character parameter information corresponding to the characters to be displayed, background color information corresponding to the characters to be displayed, background gray scale values corresponding to the characters to be displayed, equipment version information of the ink screen, screen parameter information of the ink screen, a refresh mode of the ink screen, environment information of the environment where the ink screen is located, and a function configuration state set by a user or a system, and then the second gray scale value corresponding to the first gray scale value of each target pixel is determined based on the determined gray scale mapping relationship. According to the scheme, the applicable gray mapping relation is determined according to the different relevant information of the characters to be displayed, the ink screen and the configuration state, the second gray values corresponding to the target pixels are determined more flexibly, and the flexibility and readability of character display are improved.
For example, for the case of determining the gray mapping relationship based on the text parameter information corresponding to the text to be displayed, different gray mapping relationships are configured for different text parameter information in advance, before determining the second gray value corresponding to the first gray value of the target pixel, the text parameter information of the text to be displayed is obtained, the corresponding gray mapping relationship is determined according to the text parameter information, and then the second gray value corresponding to each target pixel is determined based on the determined gray mapping relationship.
It should be explained that the gray mapping relationship provided by the present solution can be used to adjust the gray value of the pixel in the first font data to improve the readability of the text, and different gray mapping relationships can be configured for different text parameter information to match the text display of different text parameter information and improve the readability of the text. Optionally, the text parameter information provided by the scheme may be a font type, a font size, and the like. The character parameter information can be obtained by the processor of the ink screen equipment receiving an instruction for displaying the characters to be displayed and simultaneously receiving other related information of the characters to be displayed, wherein the other related information can comprise character parameter information of the characters to be displayed, including associated font files, font information, font models and the like; the character parameter detection can also be directly carried out on the characters to be displayed, and the character parameter information of the characters to be displayed is identified.
For the situation that the gray mapping relation is determined based on the background color information or the background gray value corresponding to the characters to be displayed, different gray mapping relations are configured for different background color information or different background gray values in advance, before the second gray value corresponding to the first gray value of the target pixel is determined, the background color information or the background gray value corresponding to the characters to be displayed is obtained, the corresponding gray mapping relation is determined according to the background color information or the background gray value, and then the second gray value corresponding to each target pixel is determined based on the determined gray mapping relation. According to the method, the background color or the background gray value of the character background is different, the color of the character is also different, and a proper gray mapping relation is adaptively selected according to the background color or the background gray value, so that the character is more prominently displayed on the background, and the character is more clearly displayed.
For the situation that the gray mapping relation is determined based on the refreshing mode corresponding to the ink screen, different gray mapping relations are configured for different refreshing modes in advance, the refreshing mode of the ink screen is obtained before the second gray value corresponding to the first gray value of the target pixel is determined, the corresponding gray mapping relation is determined according to the refreshing mode, and then the second gray value corresponding to each target pixel is determined based on the determined gray mapping relation. The refresh mode may be A2 mode, DU mode, regal mode, GC16 mode, etc. The processing modes of the ink screen to the characters can be different according to the difference of the refreshing mode (for example, the characters are displayed by different refreshing times or gray scale levels), and a proper gray mapping relation is adaptively selected according to the refreshing mode, so that the characters are more prominently displayed on the background, and the characters are displayed more clearly
For the condition that the gray mapping relation is determined based on the device version information of the ink screen, different gray mapping relations are configured for different device version information in advance, before the second gray value corresponding to the first gray value of the target pixel is determined, the device version information of the ink screen is obtained, the corresponding gray mapping relation is determined according to the device version information, and then the second gray value corresponding to each target pixel is determined based on the determined gray mapping relation. The situation that the software and hardware configuration of the ink screen equipment may be different and the situation that the processing mode of character display may be different can occur due to different equipment version information, and a proper gray mapping relation is adaptively selected according to the equipment version information, so that the characters are more prominently displayed on the background and are more clearly displayed.
For the condition that the gray mapping relation is determined based on the screen parameter information of the ink screen, different gray mapping relations are configured for different screen parameter information in advance, before the second gray value corresponding to the first gray value of the target pixel is determined, the screen parameter information of the ink screen is obtained, the corresponding gray mapping relation is determined according to the screen parameter information, and then the second gray value corresponding to each target pixel is determined based on the determined gray mapping relation. Optionally, the screen parameter information may be a device resolution of the ink screen, and different device resolutions may exist, and a suitable gray-scale mapping relationship is adaptively selected according to the screen parameter information, so that the display of the text on the background is more prominent, and the text display is clearer.
For the condition that the gray mapping relation is determined based on the environmental information of the environment where the ink screen is located, different gray mapping relations are configured for different environmental information in advance, before the second gray value corresponding to the first gray value of the target pixel is determined, the environmental information of the environment where the ink screen is located is obtained, the corresponding gray mapping relation is determined according to the environmental information, and then the second gray value corresponding to each target pixel is determined based on the determined gray mapping relation. Optionally, the environmental information may be an environmental illumination state or the like, and when there are different processing modes for displaying the text due to different environmental illumination states, a suitable gray-scale mapping relationship is selected according to the environmental information adaptability, so that the text is displayed more prominently on the background and the text is displayed more clearly. The ambient lighting state can be collected by a lighting sensor configured on the ink screen device, that is, ambient light parameters (such as lighting intensity, color temperature, and the like) corresponding to lighting on the ink screen are detected by the lighting sensor.
For the condition that the gray level mapping relation is determined based on the function configuration state set by the user or the system, different gray level mapping relations are configured for different function configuration states in advance, before the second gray level value corresponding to the first gray level value of the target pixel is determined, the function configuration state set by the user or the system is determined, the corresponding gray level mapping relation is determined according to the function configuration state, and then the second gray level value corresponding to each target pixel is determined based on the determined gray level mapping relation. Optionally, the function configuration state may be understood as a state of whether to start a pixel value mapping adjustment function of the antialiasing sawtooth layer, when the pixel value mapping adjustment function is started, a first color value of a pixel in the antialiasing sawtooth layer data obtained after the antialiasing sawtooth processing is adjusted to a corresponding second color value, when the pixel value mapping adjustment function is closed, the first color value does not need to be adjusted to the corresponding second color value, a proper grayscale mapping relationship is selected according to the function configuration state set by a user or a system in the scheme, so that the display of characters on a background is more prominent, and the display of characters is clearer.
Optionally, the function configuration state provided by the scheme can be used as a system-level setting, and is determined by a development worker or an after-sales worker of the ink screen device, and the function configuration state is default for a user. The development staff or the after-sales staff can change the function configuration state in the modes of software updating, equipment maintenance and authority management. Optionally, the function configuration state may also be used as an application setting, and a user of the ink screen device determines the function configuration state, that is, the user selects whether to optimize the display effect of the text based on the gray-scale mapping relationship.
In a possible embodiment, after determining the first font datum of the text to be displayed, the text display method provided in this embodiment further includes: whether to adjust a first gray value of at least one target pixel in the first glyph data to a corresponding second gray value is determined based on a function selection state set by a user or a system.
For example, the function selection state provided by the scheme may be set by a user or a system, and after determining the first font datum of the text to be displayed, it is determined whether to optimize the display effect of the text to be displayed according to the set function selection state, if so, the first gray value of at least one target pixel in the first font datum is adjusted to the corresponding second gray value, otherwise, the pixel corresponding to the antialiasing layer data in the first font datum is displayed directly based on the first gray value.
Optionally, a user interaction interface may be displayed on the ink screen, an operation instruction (e.g., click) of a user on the user interaction interface is received, a corresponding function configuration state is set according to the operation instruction, interaction hardware (e.g., a button, a switch, a touch pad, a microphone, an acceleration sensor, and the like) is further set on the ink screen device, an operation signal (e.g., a pressing signal, a switch signal, a touch signal, a voice control signal, a gesture operation signal, and the like) of the user on the interaction hardware is received through the interaction hardware, and a corresponding function configuration state is set according to the operation signal. In one possible embodiment, different gray scale mapping relationships can be set based on different display optimization levels, the display optimization level of the characters can be selected by a user, so that the corresponding gray scale mapping relationship is determined, and the user can select the display optimization level according to the use requirement of the user to adjust the character display effect.
Fig. 6 is a schematic structural diagram of a text display device according to an embodiment of the present application. Referring to fig. 6, the text display device includes a target determination module 61, a gray mapping module 62, a gray adjustment module 63, and a text display module 64.
The target determining module 61 is configured to determine first font data of a character to be displayed, and determine at least one target pixel in anti-aliasing layer data of the first font data, where the first font data includes the anti-aliasing layer data and font layer data;
the gray mapping module 62 is configured to determine, based on a set gray mapping relationship, a second gray value corresponding to the first gray value of the at least one target pixel, where a gray value distance between the second gray value and a background gray value of the text to be displayed is greater than a gray value distance between the first gray value and the background gray value;
a gray scale adjusting module 63, configured to adjust a first gray scale value of at least one target pixel in the first font data to a corresponding second gray scale value, so as to obtain second font data;
and the character display module 64 is used for driving the ink screen to display characters to be displayed based on the second font data.
The method comprises the steps of determining at least one target pixel in the anti-aliasing layer data of the first font data, adjusting the first gray value of each target pixel to be the corresponding second gray value according to the set gray mapping relation to obtain the second font data, and driving the ink screen to display the corresponding character to be displayed based on the second font data.
On the basis of the above embodiment, when determining the first font datum of the text to be displayed, the target determining module 61 includes:
determining first font information corresponding to characters to be displayed according to a set font file, wherein the font file records font information corresponding to different characters;
and drawing the first font data of the character to be displayed based on the first font information, the set font parameters and the anti-aliasing parameters.
On the basis of the above embodiment, the first font datum includes one or more anti-aliasing layer data corresponding to the inner edge and/or the outer edge of the text to be displayed.
On the basis of the above embodiment, when the target determining module 61 determines at least one target pixel in the anti-aliasing layer data of the first font datum, the method includes:
at least one pixel is determined as a target pixel from one or more anti-aliasing layer data of the first glyph data.
On the basis of the above embodiment, when determining the second gray scale value corresponding to the first gray scale value of the at least one target pixel based on the set gray scale mapping relationship, the gray scale mapping module 62 includes:
under the condition that the first gray value is smaller than the background gray value of the character to be displayed, determining a second gray value corresponding to the first gray value of at least one target pixel based on a set first gray mapping relation, wherein the second gray value determined based on the first gray mapping relation is smaller than the corresponding first gray value;
and under the condition that the first gray value is larger than the background gray value of the character to be displayed, determining a second gray value corresponding to the first gray value of at least one target pixel based on a set second gray mapping relation, wherein the second gray value determined based on the second gray mapping relation is larger than the corresponding first gray value.
On the basis of the above embodiment, the text display device further includes a mapping relationship determining module, where the mapping relationship determining module is configured to determine a grayscale mapping relationship based on one or more combinations of text parameter information corresponding to the text to be displayed, background color information corresponding to the text to be displayed, a background grayscale value corresponding to the text to be displayed, device version information of the ink screen, screen parameter information of the ink screen, a refresh mode of the ink screen, environment information of an environment where the ink screen is located, and a function configuration state set by a user or a system.
On the basis of the above embodiment, the text display device further includes a function setting module, and the function setting module is configured to determine whether to adjust the first gray scale value of at least one target pixel in the first font datum to the corresponding second gray scale value based on a function selection state set by a user or a system.
It should be noted that, in the embodiment of the text display device, each unit and each module included in the text display device are merely divided according to the functional logic, but are not limited to the above division, as long as the corresponding function can be implemented; in addition, specific names of the functional units are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the embodiment of the invention.
The embodiment of the application also provides a character display device, and the character display device can be integrated with the character display device provided by the embodiment of the application. Fig. 7 is a schematic structural diagram of a text display device according to an embodiment of the present application. Referring to fig. 7, the text display apparatus includes: an input device 73, an output device 74, a memory 72, and one or more processors 71; a memory 72 for storing one or more programs; when executed by the one or more processors 71, the one or more programs cause the one or more processors 71 to implement the text display method as provided in the above embodiments. The input device 73, the output device 74, the memory 72 and the processor 71 may be connected by a bus or other means, and fig. 7 illustrates the example of the bus connection.
The memory 72, as a computer-readable storage medium, may be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the text display method provided in any embodiment of the present application (e.g., the target determination module 61, the gray mapping module 62, the gray adjustment module 63, and the text display module 64 in the text display apparatus). The memory 72 may mainly include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application program required for at least one function; the storage data area may store data created according to use of the device, and the like. Further, the memory 72 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory 72 may further include memory located remotely from the processor 71, which may be connected to the device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 73 may be used to receive input numeric or character information and generate key signal inputs relating to user settings and function control of the apparatus. The output device 74 may include a display device such as a display screen.
The processor 71 executes software programs, instructions and modules stored in the memory 72 to execute various functional applications of the device and data processing, that is, to realize the above-described character display method.
The character display device, the equipment and the computer provided by the above can be used for executing the character display method provided by any of the above embodiments, and have corresponding functions and beneficial effects.
An embodiment of the present application further provides a storage medium storing computer-executable instructions, where the computer-executable instructions are executed by a computer processor to perform the text display method provided in the foregoing embodiment, and the text display method includes: determining first font data of characters to be displayed, and determining at least one target pixel in anti-aliasing layer data of the first font data, wherein the first font data comprises the anti-aliasing layer data and font layer data; determining a second gray value corresponding to the first gray value of at least one target pixel based on the set gray mapping relation, wherein the gray value distance between the second gray value and the background gray value of the character to be displayed is larger than the gray value distance between the first gray value and the background gray value; adjusting a first gray value of at least one target pixel in the first font data to a corresponding second gray value to obtain second font data; and driving the ink screen to display the characters to be displayed based on the second font data.
Storage medium-any of various types of memory devices or storage devices. The term "storage medium" is intended to include: mounting media such as CD-ROM, floppy disk, or tape devices; computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, lanbas (Rambus) RAM, etc.; non-volatile memory such as flash memory, magnetic media (e.g., hard disk or optical storage); registers or other similar types of memory elements, etc. The storage medium may also include other types of memory or combinations thereof. In addition, the storage medium may be located in a first computer system in which the program is executed, or may be located in a different second computer system connected to the first computer system through a network (such as the internet). The second computer system may provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media that may reside in different locations, such as in different computer systems that are connected via a network. The storage medium may store program instructions (e.g., embodied as a computer program) that are executable by one or more processors.
Of course, the storage medium storing the computer-executable instructions provided in the embodiments of the present application is not limited to the above-mentioned text display method, and may also perform related operations in the text display method provided in any embodiments of the present application.
The text display device, the apparatus, and the storage medium provided in the above embodiments may execute the text display method provided in any embodiment of the present application, and reference may be made to the text display method provided in any embodiment of the present application without detailed technical details described in the above embodiments.
The foregoing is considered as illustrative of the preferred embodiments of the invention and the technical principles employed. The present application is not limited to the particular embodiments provided herein, and various obvious changes, adaptations and substitutions will now occur to those skilled in the art without departing from the scope of the present application. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the claims.
Claims (10)
1. A method for displaying text, comprising:
determining first font data of a character to be displayed, and determining at least one target pixel in anti-aliasing layer data of the first font data, wherein the first font data comprises the anti-aliasing layer data and font layer data;
determining a second gray value corresponding to the first gray value of at least one target pixel based on a set gray mapping relation, wherein the gray value distance between the second gray value and the background gray value of the character to be displayed is greater than the gray value distance between the first gray value and the background gray value;
adjusting a first gray value of at least one target pixel in the first font data to a corresponding second gray value to obtain second font data;
and driving an ink screen to display the characters to be displayed based on the second font data.
2. The method of claim 1, wherein the determining the first font datum for the text to be displayed comprises:
determining first font information corresponding to characters to be displayed according to a set font file, wherein the font file records font information corresponding to different characters;
and drawing the first font data of the character to be displayed based on the first font information, the set font parameters and the anti-aliasing parameters.
3. The text display method according to claim 1, wherein the first font datum includes one or more anti-aliasing layer data corresponding to an inner edge and/or an outer edge of the text to be displayed.
4. The text display method of claim 1, wherein the determining at least one target pixel in the anti-aliasing layer data of the first font datum comprises:
determining at least one pixel as a target pixel from one or more anti-aliasing layer data of the first glyph data.
5. The method of claim 1, wherein the determining a second gray scale value corresponding to the first gray scale value of at least one of the target pixels based on the set gray scale mapping relationship comprises:
under the condition that the first gray value is smaller than the background gray value of the character to be displayed, determining a second gray value corresponding to the first gray value of at least one target pixel based on a set first gray mapping relation, wherein the second gray value determined based on the first gray mapping relation is smaller than the corresponding first gray value;
and under the condition that the first gray value is larger than the background gray value of the character to be displayed, determining a second gray value corresponding to the first gray value of at least one target pixel based on a set second gray mapping relation, wherein the second gray value determined based on the second gray mapping relation is larger than the corresponding first gray value.
6. The method of claim 1, wherein before determining the second gray scale value corresponding to the first gray scale value of at least one of the target pixels based on the set gray scale mapping relationship, the method further comprises:
determining a gray mapping relation based on one or more combinations of character parameter information corresponding to the characters to be displayed, background color information corresponding to the characters to be displayed, background gray values corresponding to the characters to be displayed, equipment version information of an ink screen, screen parameter information of the ink screen, a refreshing mode of the ink screen, environment information of the environment where the ink screen is located, and a function configuration state set by a user or a system.
7. The method of claim 1, wherein after determining the first font datum of the text to be displayed, further comprising:
and determining whether to adjust the first gray value of at least one target pixel in the first font datum to a corresponding second gray value based on a function selection state set by a user or a system.
8. A character display device is characterized by comprising a target determining module, a gray mapping module, a gray adjusting module and a character display module, wherein:
the target determining module is used for determining first font data of characters to be displayed and determining at least one target pixel in anti-aliasing layer data of the first font data, wherein the first font data comprises anti-aliasing layer data and font layer data;
the gray mapping module is configured to determine, based on a set gray mapping relationship, a second gray value corresponding to a first gray value of at least one target pixel, where a gray value distance between the second gray value and a background gray value of the text to be displayed is greater than a gray value distance between the first gray value and the background gray value;
the gray scale adjusting module is used for adjusting a first gray scale value of at least one target pixel in the first font data into a corresponding second gray scale value to obtain second font data;
and the character display module is used for driving an ink screen to display the characters to be displayed based on the second font datum.
9. A text display device, comprising: a memory and one or more processors;
the memory for storing one or more programs;
when executed by the one or more processors, cause the one or more processors to implement the text display method of any of claims 1-7.
10. A storage medium storing computer-executable instructions for performing the text display method of any one of claims 1-7 when executed by a computer processor.
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