CN109410813B - Adjusting method and device of touch whiteboard - Google Patents

Adjusting method and device of touch whiteboard Download PDF

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Publication number
CN109410813B
CN109410813B CN201811241952.7A CN201811241952A CN109410813B CN 109410813 B CN109410813 B CN 109410813B CN 201811241952 A CN201811241952 A CN 201811241952A CN 109410813 B CN109410813 B CN 109410813B
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adjusting
background image
visual attention
target
touch
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CN109410813A (en
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沈海杰
徐爱臣
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Hisense Visual Technology Co Ltd
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Hisense Visual Technology Co Ltd
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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
    • 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
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0416—Control or interface arrangements specially adapted for digitisers
    • 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
    • G09G3/2003—Display of colours
    • 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
    • G09G3/3406—Control of illumination source
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0626—Adjustment of display parameters for control of overall brightness
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0666—Adjustment of display parameters for control of colour parameters, e.g. colour temperature

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Controls And Circuits For Display Device (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)

Abstract

The application provides a method and a device for adjusting a touch whiteboard, wherein the method comprises the following steps: when the touch operation is identified, determining a visual attention area on the touch whiteboard according to the touch position of the touch operation on the touch whiteboard; and adjusting the display parameters of the visual attention area according to a preset adjustment mode so as to adjust the display effect of the visual attention area. By the method, the touch whiteboard can be dynamically and locally adjusted according to the writing state of a writer on the touch whiteboard, so that the visual comfort of the writer is improved.

Description

Adjusting method and device of touch whiteboard
Technical Field
The present disclosure relates to the field of touch technologies, and in particular, to a method and an apparatus for adjusting a touch whiteboard.
Background
With the rapid development of touch technology, writing on a touch whiteboard has been widely applied to many fields such as teaching and office, and when the touch whiteboard is used in these fields, mainly the application scene that a writer and a viewer watch text for a long time is involved.
In the prior art, the overall backlight brightness of the touch whiteboard is usually adjusted by an overall backlight adjustment method. However, for the writer, by using the adjustment method, since the overall backlight brightness of the touch whiteboard is adjusted, the phenomena that a large area of fixed background color exists on the touch whiteboard and the background brightness and contrast are relatively fixed cannot be avoided, and the problem that the writer is prone to visual fatigue cannot be solved.
Disclosure of Invention
In view of this, the present application provides a method and an apparatus for adjusting a touch whiteboard, by which the touch whiteboard can be dynamically and locally adjusted according to a writing state of a writer on the touch whiteboard, so as to improve a visual comfort of the writer.
Specifically, the method is realized through the following technical scheme:
according to a first aspect of the embodiments of the present application, there is provided a method for adjusting a touch whiteboard, the method including:
when the touch operation is identified, determining a visual attention area on the touch whiteboard according to the touch position of the touch operation on the touch whiteboard;
and adjusting the display parameters of the visual attention area according to a preset adjustment mode so as to adjust the display effect of the visual attention area.
Optionally, the display parameters include one or more of the following:
the brightness, the color temperature, the color value of handwriting and the backlight brightness of a background image in the visual attention area;
the preset adjustment strategy comprises one or more of the following items:
adjusting the backlight brightness of the visual attention area according to the current ambient light illumination and the average pixel brightness APL of the background image of the touch whiteboard;
adjusting the color temperature of a background image on the visual attention area according to the current ambient light color temperature;
adjusting the brightness value of the background image on the visual attention area according to a preset gain coefficient;
and adjusting the color value of the handwriting according to the color value of the background image.
Optionally, the determining, according to the touch position of the touch operation on the touch whiteboard, a visual attention area on the touch whiteboard includes:
and determining a visual attention area on the touch whiteboard by taking the touch position of the touch operation on the touch whiteboard as the center and taking the preset range value as the side length.
Alternatively to this, the first and second parts may,
adjusting the backlight brightness of the visual attention area according to the current ambient light illumination and the APL of the background image of the touch whiteboard, including:
determining a target maximum backlight brightness or a target maximum Pulse Width Modulation (PWM) duty ratio corresponding to the current ambient light illumination according to a preset light sensation curve model, wherein the light sensation curve model is used for representing the corresponding relation between the ambient light illumination and the maximum backlight brightness or the maximum PWM duty ratio;
determining a target backlight ratio corresponding to the APL of the background image according to a preset brightness curve model, wherein the brightness curve model is used for representing the corresponding relation between the APL of the background image and the backlight ratio;
obtaining target backlight brightness or target PWM duty ratio by using the target maximum backlight brightness or target maximum PWM duty ratio and the target backlight ratio;
adjusting the backlight brightness of the visual attention area to the target backlight brightness, or adjusting the backlight brightness of the visual attention area by using the target PWM duty ratio;
wherein the adjusting the color temperature of the background image on the visual attention area according to the current color temperature of the ambient light comprises:
determining a target optimal background color temperature corresponding to the current ambient light color temperature according to a preset color temperature curve model, wherein the color temperature curve model is used for representing the corresponding relation between the ambient light color temperature and the optimal background color temperature;
adjusting the color temperature of the background image on the visual attention to the target optimal background color temperature;
wherein the adjusting the brightness value of the background image on the visual attention area according to the preset gain coefficient comprises:
dividing the visual attention area into a first adjustment area and a second adjustment area, wherein the second adjustment area is positioned at the periphery of the first adjustment area;
adjusting the brightness value of the background image on the first adjustment area according to a preset first gain coefficient, and adjusting the brightness value of the background image on the second adjustment area according to a preset second gain coefficient;
wherein the second gain coefficient is greater than the first gain coefficient, and the first gain coefficient and the second gain coefficient are both positive numbers less than 1;
wherein, the color value of the handwriting is adjusted according to the color value of the background image, including:
searching a preset color adaptation table according to the color value of the background image, wherein the color adaptation table records the corresponding relation between the color value of the background image and the color value of the writing, and taking the color value of the writing corresponding to the color value of the background image as a target color value;
and adjusting the color value of the handwriting to be the target color value.
According to a second aspect of the embodiments of the present application, there is provided an adjusting device for a touch whiteboard, the device including:
the area determination module is used for determining a visual attention area on the touch whiteboard according to the touch position of the touch operation on the touch whiteboard when the touch operation is identified;
and the adjusting module is used for adjusting the display parameters of the visual attention area according to a preset adjusting mode so as to adjust the display effect of the visual attention area.
Optionally, the display parameters include one or more of the following:
the brightness, the color temperature, the color value of handwriting and the backlight brightness of a background image in the visual attention area;
the preset adjustment strategy comprises one or more of the following items:
adjusting the backlight brightness of the visual attention area according to the current ambient light illumination and the average pixel brightness APL of the background image of the touch whiteboard;
adjusting the color temperature of a background image on the visual attention area according to the current ambient light color temperature;
adjusting the brightness value of the background image on the visual attention area according to a preset gain coefficient;
and adjusting the color value of the handwriting according to the color value of the background image.
Optionally, the region determining module is specifically configured to:
and determining a visual attention area on the touch whiteboard by taking the touch position of the touch operation on the touch whiteboard as the center and taking the preset range value as the side length.
Optionally, the adjusting module includes:
the first determining submodule is used for determining the target maximum backlight brightness or the target maximum PWM duty ratio corresponding to the current ambient light illumination according to a preset light sensation curve model, and the light sensation curve model is used for representing the corresponding relation between the ambient light illumination and the maximum backlight brightness or the maximum PWM duty ratio;
the second determining submodule is used for determining a target backlight proportion corresponding to the APL of the background image according to a preset brightness curve model, and the brightness curve model is used for representing the corresponding relation between the APL of the background image and the backlight proportion;
the calculation submodule is used for obtaining the target backlight brightness or the target PWM duty ratio by utilizing the target maximum backlight brightness or the target maximum PWM duty ratio and the target backlight ratio;
the backlight adjusting submodule is used for adjusting the backlight brightness of the visual attention area to the target backlight brightness or adjusting the backlight brightness of the visual attention area by utilizing the target PWM duty ratio;
and/or the presence of a gas in the gas,
the third determining submodule is used for determining the target optimal background color temperature corresponding to the current ambient light color temperature according to a preset color temperature curve model, and the color temperature curve model is used for representing the corresponding relation between the ambient light color temperature and the optimal background color temperature;
a color temperature adjusting submodule for adjusting the color temperature of the background image on the visual attention area to the target optimal background color temperature;
and/or the presence of a gas in the gas,
the dividing submodule is used for dividing the visual attention area into a first adjusting area and a second adjusting area, wherein the second adjusting area is positioned at the periphery of the first adjusting area;
the brightness adjusting submodule is used for adjusting the brightness value of the background image on the first adjusting area according to a preset first gain coefficient and adjusting the brightness value of the background image on the second adjusting area according to a preset second gain coefficient;
wherein the second gain coefficient is greater than the first gain coefficient, and the first gain coefficient and the second gain coefficient are both positive numbers less than 1;
and/or the presence of a gas in the gas,
the searching submodule is used for searching a preset color adaptation table according to the color value of the background image, the color adaptation table records the corresponding relation between the color value of the background image and the color value of the writing handwriting, and the color value of the writing handwriting corresponding to the color value of the background image is searched and used as a target color value;
and the color adjusting submodule is used for adjusting the color value of the handwriting to be the target color value.
According to a third aspect of embodiments of the present application, there is provided a touch device, the device including:
a processor;
a memory for storing the processor-executable instructions;
the processor is configured to execute the steps of the method for adjusting any touch whiteboard provided in the embodiments of the present application by using the executable instructions.
According to a fourth aspect of the embodiments of the present application, a touch device is provided, where the device includes the adjusting apparatus of any touch whiteboard provided in the embodiments of the present application.
As can be seen from the above embodiments, when a touch operation is identified, a visual attention area is determined on the touch whiteboard according to a touch position of the touch operation on the touch whiteboard, and a display parameter of the visual attention area is adjusted according to a preset adjustment mode to adjust a display effect of the visual attention area, so that a dynamic local adjustment of the touch whiteboard according to a writing state of a writer on the touch whiteboard can be realized, and a visual comfort level of the writer can be improved.
Drawings
Fig. 1 is a flowchart of an embodiment of a method for adjusting a touch whiteboard according to an exemplary embodiment of the present application;
FIG. 2 is an example of a visual area of interest;
FIG. 3 is an example of a light sensation curve model;
FIG. 4 is an example of a luminance profile model;
FIG. 5 is an example of a color temperature curve model;
FIG. 6 is another example of a visual area of interest;
fig. 7 is a hardware structure diagram of a touch device in which an adjusting device of a touch whiteboard of the present application is located;
fig. 8 is a block diagram of an embodiment of an adjusting device for a touch whiteboard according to an exemplary embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.
It is to be understood that although the terms first, second, third, etc. may be used herein to describe various information, such information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, first information may also be referred to as second information, and similarly, second information may also be referred to as first information, without departing from the scope of the present application. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.
Referring to fig. 1, a flowchart of an embodiment of a method for adjusting a touch whiteboard according to an exemplary embodiment of the present application is shown, where the method is applicable to a touch whiteboard and includes the following steps:
step 101: and when the touch operation is identified, determining a visual attention area on the touch whiteboard according to the touch position of the touch operation on the touch whiteboard.
In the application, a writer can perform writing operation on the touch whiteboard through a finger and a touch pen, when the writer performs writing operation, the touch whiteboard can recognize the touch operation of the writer, and the contact position of the finger or the touch pen and the touch whiteboard is the touch position of the touch operation on the touch whiteboard.
In an embodiment, a visual attention area may be determined on the touch whiteboard by taking a touch position of the touch operation on the touch whiteboard as a center and taking the preset range value as a side length, for example, as shown in fig. 2, which is an example of the visual attention area, in fig. 2, a point a represents the touch position, and a dashed rectangle represents the visual attention area.
For a writer to perform writing operation on the touch whiteboard, the distance between the writer and the touch whiteboard is approximately 0.65 m, and the viewing angle is approximately 25 degrees, so that the viewing range can be calculated to be approximately 30 cm, and based on this, the preset range can be set to be 30 cm.
It should be noted that the above-described visual attention area is only an example, and in practical applications, the visual attention area may be an area with any shape, such as a circular area, and the present application does not limit this.
Step 102: and adjusting the display parameters of the visual attention area according to a preset adjusting mode so as to adjust the display effect of the visual attention area.
In this application, the factor that influences the visual comfort of the writer includes the backlight brightness of touch whiteboard, the luminance of background image, color temperature, ambient light illumination, the color value of writing, etc., wherein, ambient light illumination is the objective factor that can't change, thereby, can regard backlight brightness, the luminance of background image, color temperature, the color value of writing as the display parameter of visual attention area, utilize the adjustment mode of predetermineeing to adjust one or several in the display parameter, in order to improve the display effect in visual attention area.
In the present application, the preset adjustment strategy may include one or more of the following items:
(1) and adjusting the backlight brightness of the visual attention area according to the current ambient light illumination and the average pixel brightness APL of the background image of the touch whiteboard.
(2) And adjusting the color temperature of the background image on the visual attention area according to the current color temperature of the ambient light.
(3) And adjusting the brightness value of the background image on the visual attention area according to a preset gain coefficient.
(4) And adjusting the color value of the handwriting according to the color value of the background image.
The foregoing adjustment strategies are described in detail as follows:
(1) and adjusting the backlight brightness of the visual attention area according to the current ambient light illumination and the average pixel brightness APL of the background image of the touch whiteboard.
Under the same ambient light illumination, the visual comfort of a writer can be influenced by too high or too low backlight brightness, and under different ambient light illumination, the same backlight brightness cannot meet the watching experience of the writer.
In one embodiment, since the backlight control of the touch whiteboard has been formally developed to a digital dimming manner based on PWM (Pulse Width Modulation), in which the brightness of the LED lamps is controlled by adjusting the turn-on time of the LED lamps on the backlight board in such a manner that the PWM duty ratio is adjusted under a constant operating current condition to adjust the backlight brightness. Therefore, the backlight brightness can be represented by the PWM duty ratio, and then the light-sensing curve model can be used to represent the correspondence between the ambient light illuminance and the maximum PWM duty ratio, for example, as shown in fig. 3, which is an example of the light-sensing curve model.
In addition, under the same backlight brightness, the APL of the background image is also a key factor affecting the visual comfort of the writer, and generally speaking, the larger the APL of the background image is, the correspondingly increased backlight brightness can better satisfy the viewing experience of the writer, and improve the visual comfort of the writer.
Based on the above description, the maximum backlight brightness (or the maximum PWM duty ratio) corresponding to the current ambient light illumination can be determined according to the light sensation curve model illustrated in fig. 3, for convenience of description, the determined maximum backlight brightness is referred to as a target maximum backlight brightness (or the determined maximum PWM duty ratio is referred to as a target PWM duty ratio), and determines the backlight ratio corresponding to the APL of the background image selected by the user according to the brightness curve model illustrated in fig. 4, for convenience of description, the determined backlight duty ratio is referred to as a target backlight duty ratio, and then, the target backlight luminance (or the target PWM duty ratio) is determined by using the target maximum backlight luminance (or the target maximum PWM duty ratio) and the target backlight duty ratio, and finally, the backlight luminance of the visual attention area is adjusted to the target backlight luminance (or the backlight luminance of the visual attention area is adjusted by using the target PWM duty ratio).
Taking the maximum PWM duty ratio as an example, assuming that the current ambient light illuminance is 400lux, the target maximum PWM duty ratio determined by the light sensation curve model illustrated in fig. 3 is 200, assuming that the APL of the background image is 10% IRE, and the target backlight duty ratio determined by the brightness curve model illustrated in fig. 4 is 40%, then the obtained target PWM duty ratio is 80(200 × 40%) according to the above description.
In addition, in the present application, the overall backlight brightness of the touch whiteboard can be adjusted by using the preset adjustment manner, which is not limited in the present application.
(2) And adjusting the color temperature of the background image on the visual attention area according to the current color temperature of the ambient light.
Similar to the light perception curve model, in the present application, a technical means may be adopted to simulate a daylight system to generate ambient light with different color temperatures in advance, and combine different color temperatures of a background image to perform subjective evaluation on a subject to obtain an optimal background color temperature under different color temperatures of the ambient light, where the "optimal background color temperature" refers to an image color temperature that allows the subject to have an optimal viewing experience, and a color temperature curve model is established based on the optimal background color temperature, and the color temperature curve model is used to represent a corresponding relationship between the color temperature of the ambient light and the optimal background color temperature, for example, as shown in fig. 5, which is an example of the color temperature curve model, and in fig. 5, T is shownaAnd TbTwo ambient light color temperatures, wherein, the color temperature is between 0 and TaIn this ambient light color temperature range, the corresponding optimum background color temperature is kept at T1, at TbWithin the ambient light color temperature range of +∞, the corresponding optimum background color temperature envelope is kept at T2a～TbIn the ambient light color temperature range, the corresponding optimal background color temperature and the ambient light color temperature are in positive correlation.
Based on this, the color temperature curve model illustrated in fig. 5 may be used to determine the optimal background color temperature of the current ambient light color temperature object, and for convenience of description, the determined optimal background color temperature may be referred to as a target optimal background color temperature, and then the color temperature of an image region overlapping with the visual attention region on the background image may be adjusted to the target optimal background color temperature.
(3) And adjusting the brightness value of the background image on the visual attention area according to a preset gain coefficient.
In this embodiment of the application, the visual attention region may be divided into M × N sub-regions, for example, as shown in fig. 6, the visual attention region is divided into 3 × 3 sub-regions, and a gain coefficient is set for each sub-region, for any sub-region, the brightness value of the pixel point in the background image on the sub-region may be multiplied by the gain coefficient of the sub-region to obtain an adjusted brightness value, and the brightness value of the pixel point in the background image on the sub-region may be adjusted to the adjusted brightness value.
Further, in the embodiment of the present application, on the basis of dividing the visual attention region into M × N sub-regions, the visual attention region may be further divided into a first adjustment region and a second adjustment region, where the second adjustment region is located at the periphery of the first adjustment region, that is, the first adjustment region is located at the center of the visual attention region, for example, as shown in fig. 6, a gray filled portion represents the first adjustment region, and the remaining portion represents the second adjustment region. In this embodiment, for convenience of description, the gain coefficient of the first adjustment region is referred to as a first gain coefficient, and the gain coefficient of the second adjustment region is referred to as a second gain coefficient, based on which, it is also possible to adjust the luminance value of the background image on the first adjustment region according to the first gain coefficient set in advance, and to adjust the luminance value of the background image on the second adjustment region according to the second gain coefficient set in advance.
The second gain coefficient may be set to be greater than the first gain coefficient, and both the first gain coefficient and the second gain coefficient are positive numbers less than 1, so that the degree of adjustment on the brightness value of the background image in the first adjustment region is greater than the degree of adjustment on the brightness value of the background image in the second adjustment region.
(4) And adjusting the color value of the handwriting according to the color value of the background image.
In an embodiment, if the writer writes with the default color value, a preset color adaptation table may be searched according to the color value of the background image, where the color adaptation table records a correspondence between the color value of the background image and the color value of the handwriting, for example, as shown in table 1 below, which is an example of the color adaptation table:
TABLE 1
Color values of background images Colour values of handwriting
White (255, 255, 255) Black (0, 0, 0)
Sky blue (0, 191, 255) Violet color (141, 0, 211)
… …
Subsequently, the color value of the found writing handwriting corresponding to the color value of the background image can be used as a target color value, and the color value of the writing comparison is adjusted to the target color value.
It can be understood by those skilled in the art that if the writer sets the color value of the handwriting by himself, the color value of the handwriting may not need to be adjusted according to the above description.
As can be seen from the above embodiments, when a touch operation is identified, a visual attention area is determined on the touch whiteboard according to a touch position of the touch operation on the touch whiteboard, and a display parameter of the visual attention area is adjusted according to a preset adjustment mode to adjust a display effect of the visual attention area, so that a dynamic local adjustment of the touch whiteboard according to a writing state of a writer on the touch whiteboard can be realized, and a visual comfort level of the writer can be improved.
Corresponding to the embodiment of the adjusting method of the touch whiteboard, the application also provides an embodiment of an adjusting device of the touch whiteboard.
The embodiment of the adjusting device of the touch whiteboard can be applied to touch equipment. The device embodiments may be implemented by software, or by hardware, or by a combination of hardware and software. Taking a software implementation as an example, as a device in a logical sense, the device is formed by reading a corresponding computer program instruction in a nonvolatile memory into an internal memory for running through a processor of a touch device where the device is located. In terms of hardware, as shown in fig. 7, the touch device where the adjusting apparatus of the touch whiteboard of the present application is located is a hardware structure diagram, except for the processor 71, the memory 72, the network interface 73, the nonvolatile memory 74, and the internal bus 75 shown in fig. 7, the touch device where the apparatus is located in the embodiment may also include other hardware according to the actual function of the device, which is not described again.
Referring to fig. 8, a block diagram of an embodiment of an adjusting apparatus for a touch whiteboard according to an exemplary embodiment of the present application is shown in fig. 8, where the apparatus may include: a region determination module 81, and an adjustment module 82.
The area determining module 81 may be configured to, when a touch operation is identified, determine a visual attention area on the touch whiteboard according to a touch position of the touch operation on the touch whiteboard;
the adjusting module 82 may be configured to adjust the display parameter of the visual attention area according to a preset adjusting manner, so as to adjust the display effect of the visual attention area.
In one embodiment, the display parameters include one or more of:
the brightness, the color temperature, the color value of handwriting and the backlight brightness of a background image in the visual attention area;
the preset adjustment strategy comprises one or more of the following items:
adjusting the backlight brightness of the visual attention area according to the current ambient light illumination and the average pixel brightness APL of the background image of the touch whiteboard;
adjusting the color temperature of a background image on the visual attention area according to the current ambient light color temperature;
adjusting the brightness value of the background image on the visual attention area according to a preset gain coefficient;
and adjusting the color value of the handwriting according to the color value of the background image.
In an embodiment, the region determining module 81 may be specifically configured to:
and determining a visual attention area on the touch whiteboard by taking the touch position of the touch operation on the touch whiteboard as the center and taking the preset range value as the side length.
In one embodiment, the adjustment module 82 may include (not shown in fig. 8):
the first determining submodule is used for determining the target maximum backlight brightness or the target maximum Pulse Width Modulation (PWM) duty ratio corresponding to the current ambient light illumination according to a preset light sensation curve model, and the light sensation curve model is used for representing the corresponding relation between the ambient light illumination and the maximum backlight brightness or the maximum PWM duty ratio;
the second determining submodule is used for determining a target backlight proportion corresponding to the APL of the background image according to a preset brightness curve model, and the brightness curve model is used for representing the corresponding relation between the APL of the background image and the backlight proportion;
the calculation submodule is used for obtaining the target backlight brightness or the target PWM duty ratio by utilizing the target maximum backlight brightness or the target maximum PWM duty ratio and the target backlight ratio;
the backlight adjusting submodule is used for adjusting the backlight brightness of the visual attention area to the target backlight brightness or adjusting the backlight brightness of the visual attention area by utilizing the target PWM duty ratio;
and/or (not shown in fig. 8):
the third determining submodule is used for determining the target optimal background color temperature corresponding to the current ambient light color temperature according to a preset color temperature curve model, and the color temperature curve model is used for representing the corresponding relation between the ambient light color temperature and the optimal background color temperature;
a color temperature adjusting submodule for adjusting the color temperature of the background image on the visual attention area to the target optimal background color temperature;
and/or (not shown in fig. 8):
the dividing submodule is used for dividing the visual attention area into a first adjusting area and a second adjusting area, wherein the second adjusting area is positioned at the periphery of the first adjusting area;
the brightness adjusting submodule is used for adjusting the brightness value of the background image on the first adjusting area according to a preset first gain coefficient and adjusting the brightness value of the background image on the second adjusting area according to a preset second gain coefficient;
wherein the second gain coefficient is greater than the first gain coefficient, and the first gain coefficient and the second gain coefficient are both positive numbers less than 1;
and/or (not shown in fig. 8):
the searching submodule is used for searching a preset color adaptation table according to the color value of the background image, the color adaptation table records the corresponding relation between the color value of the background image and the color value of the writing handwriting, and the color value of the writing handwriting corresponding to the color value of the background image is searched and used as a target color value;
and the color adjusting submodule is used for adjusting the color value of the handwriting to be the target color value.
The implementation process of the functions and actions of each unit in the above device is specifically described in the implementation process of the corresponding step in the above method, and is not described herein again.
For the device embodiments, since they substantially correspond to the method embodiments, reference may be made to the partial description of the method embodiments for relevant points. The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules can be selected according to actual needs to achieve the purpose of the scheme of the application. One of ordinary skill in the art can understand and implement it without inventive effort.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the scope of protection of the present application.

Claims (10)

1. A method for adjusting a touch whiteboard is characterized by comprising the following steps:
when the touch operation is identified, determining a visual attention area on the touch whiteboard according to the touch position of the touch operation on the touch whiteboard;
adjusting the display parameters of the visual attention area according to a preset adjustment strategy so as to adjust the display effect of the visual attention area; if the display parameter includes the brightness of the background image on the visual attention area, the preset adjustment strategy includes:
determining a target maximum backlight brightness or a target maximum Pulse Width Modulation (PWM) duty ratio corresponding to the current ambient light illumination according to a preset light sensation curve model, wherein the light sensation curve model is used for representing the corresponding relation between the ambient light illumination and the maximum backlight brightness or the maximum PWM duty ratio;
determining a target backlight ratio corresponding to the APL of the background image according to a preset brightness curve model, wherein the brightness curve model is used for representing the corresponding relation between the APL of the background image and the backlight ratio;
obtaining target backlight brightness or target PWM duty ratio by using the target maximum backlight brightness or target maximum PWM duty ratio and the target backlight ratio;
and adjusting the backlight brightness of the visual attention area to the target backlight brightness, or adjusting the backlight brightness of the visual attention area by using the target PWM duty ratio.
2. The method of claim 1, further comprising: if the display parameters include one or more of: color temperature of a background image, color value of handwriting and backlight brightness in the visual attention area; the preset adjustment strategy comprises one or more of the following items:
adjusting the color temperature of a background image on the visual attention area according to the current ambient light color temperature;
adjusting the brightness value of the background image on the visual attention area according to a preset gain coefficient;
and adjusting the color value of the handwriting according to the color value of the background image.
3. The method of claim 1, wherein determining a visual area of interest on the touch whiteboard according to the touch position of the touch operation on the touch whiteboard comprises:
and determining a visual attention area on the touch whiteboard by taking the touch position of the touch operation on the touch whiteboard as the center and taking the preset range value as the side length.
4. The method of claim 2,
wherein the adjusting the color temperature of the background image on the visual attention area according to the current color temperature of the ambient light comprises:
determining a target optimal background color temperature corresponding to the current ambient light color temperature according to a preset color temperature curve model, wherein the color temperature curve model is used for representing the corresponding relation between the ambient light color temperature and the optimal background color temperature;
adjusting the color temperature of the background image on the visual attention to the target optimal background color temperature;
wherein the adjusting the brightness value of the background image on the visual attention area according to the preset gain coefficient comprises:
dividing the visual attention area into a first adjustment area and a second adjustment area, wherein the second adjustment area is positioned at the periphery of the first adjustment area;
adjusting the brightness value of the background image on the first adjustment area according to a preset first gain coefficient, and adjusting the brightness value of the background image on the second adjustment area according to a preset second gain coefficient;
wherein the second gain coefficient is greater than the first gain coefficient, and the first gain coefficient and the second gain coefficient are both positive numbers less than 1;
wherein, the color value of the handwriting is adjusted according to the color value of the background image, including:
searching a preset color adaptation table according to the color value of the background image, wherein the color adaptation table records the corresponding relation between the color value of the background image and the color value of the writing, and taking the color value of the writing corresponding to the color value of the background image as a target color value;
and adjusting the color value of the handwriting to be the target color value.
5. An adjusting device for a touch whiteboard, the device comprising:
the area determination module is used for determining a visual attention area on the touch whiteboard according to the touch position of the touch operation on the touch whiteboard when the touch operation is identified;
the adjusting module is used for adjusting the display parameters of the visual attention area according to a preset adjusting strategy so as to adjust the display effect of the visual attention area; if the display parameter includes the brightness of the background image on the visual attention area, the preset adjustment strategy includes:
determining a target maximum backlight brightness or a target maximum Pulse Width Modulation (PWM) duty ratio corresponding to the current ambient light illumination according to a preset light sensation curve model, wherein the light sensation curve model is used for representing the corresponding relation between the ambient light illumination and the maximum backlight brightness or the maximum PWM duty ratio;
determining a target backlight ratio corresponding to the APL of the background image according to a preset brightness curve model, wherein the brightness curve model is used for representing the corresponding relation between the APL of the background image and the backlight ratio;
obtaining target backlight brightness or target PWM duty ratio by using the target maximum backlight brightness or target maximum PWM duty ratio and the target backlight ratio;
and adjusting the backlight brightness of the visual attention area to the target backlight brightness, or adjusting the backlight brightness of the visual attention area by using the target PWM duty ratio.
6. The apparatus of claim 5, wherein the adjustment module is further specifically configured to: if the display parameters include one or more of: color temperature of a background image, color value of handwriting and backlight brightness in the visual attention area; the preset adjustment strategy comprises one or more of the following items:
adjusting the color temperature of a background image on the visual attention area according to the current ambient light color temperature;
adjusting the brightness value of the background image on the visual attention area according to a preset gain coefficient;
and adjusting the color value of the handwriting according to the color value of the background image.
7. The apparatus of claim 5, wherein the region determination module is specifically configured to:
and determining a visual attention area on the touch whiteboard by taking the touch position of the touch operation on the touch whiteboard as the center and taking the preset range value as the side length.
8. The apparatus of claim 6, wherein the adjustment module comprises:
the third determining submodule is used for determining the target optimal background color temperature corresponding to the current ambient light color temperature according to a preset color temperature curve model, and the color temperature curve model is used for representing the corresponding relation between the ambient light color temperature and the optimal background color temperature;
a color temperature adjusting submodule for adjusting the color temperature of the background image on the visual attention area to the target optimal background color temperature;
and/or the presence of a gas in the gas,
the dividing submodule is used for dividing the visual attention area into a first adjusting area and a second adjusting area, wherein the second adjusting area is positioned at the periphery of the first adjusting area;
the brightness adjusting submodule is used for adjusting the brightness value of the background image on the first adjusting area according to a preset first gain coefficient and adjusting the brightness value of the background image on the second adjusting area according to a preset second gain coefficient;
wherein the second gain coefficient is greater than the first gain coefficient, and the first gain coefficient and the second gain coefficient are both positive numbers less than 1;
and/or the presence of a gas in the gas,
the searching submodule is used for searching a preset color adaptation table according to the color value of the background image, the color adaptation table records the corresponding relation between the color value of the background image and the color value of the writing handwriting, and the color value of the writing handwriting corresponding to the color value of the background image is searched and used as a target color value;
and the color adjusting submodule is used for adjusting the color value of the handwriting to be the target color value.
9. A touch device, the device comprising:
a processor;
a memory for storing the processor-executable instructions;
wherein the processor is configured to perform the steps of any of the methods of claims 1-4 using the executable instructions.
10. Touch device, characterized in that it comprises the adjustment means of any one of claims 5-8.
CN201811241952.7A 2018-10-24 2018-10-24 Adjusting method and device of touch whiteboard Active CN109410813B (en)

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