WO2018082239A1

WO2018082239A1 - Method and apparatus for obtaining color based on touch screen

Info

Publication number: WO2018082239A1
Application number: PCT/CN2017/077147
Authority: WO
Inventors: 李逸然
Original assignee: 广州视源电子科技股份有限公司; 广州视臻信息科技有限公司
Priority date: 2016-11-07
Filing date: 2017-03-17
Publication date: 2018-05-11

Abstract

A method and apparatus for obtaining a color based on a touch screen. The method comprises: detecting a touch between a user and a touch screen (S11); determining a target area for extracting a color according to the touch when the detected touch corresponds to a preset touch operation (S12); extracting color value of all colors comprised in the target area (S13); displaying a corresponding color according to the extracted color value so that the user can select the color according to the displayed color (S14); obtaining the color selected by the user when the user's selection of the color currently displayed is monitored (S15). By means of the method and apparatus, the color required by a user can be obtained faster and more accurately, the process of obtaining a target color is simplified, the working efficiency is improved, the accuracy of obtaining the target color is increased, and the user's experience is improved.

Description

Touch screen based color acquisition method and device

Technical field

The present invention relates to the field of computer vision, and in particular, to a touch screen based color acquisition method and apparatus.

Background technique

The smart tablet is a new type of electronic display device. Users can write text and draw graphics on smart tablets, which are widely used in education, business meetings, business presentations and other fields.

Typically, users use different colored handwriting to distinguish between different categories of writing, and most users want to use the same color of handwriting to write the same category of content. Therefore, during the writing process, when the user needs to supplement the previously written content, it is necessary to switch back to the previously used handwriting color. In the existing solution, the user screens the color software tool of the smart tablet by the naked eye to retrieve the color of the handwriting used before. However, there are often multiple similar colors in the color software tool, and the user needs to spend a lot of time and Efforts to compare, reduce the ease of use of color selection, and some users have low ability to identify colors, easy to appear bias when selected, affecting the normal use of users.

Summary of the invention

The technical problem to be solved by the present invention is to provide a touch screen-based color acquisition method and apparatus, which can acquire the color required by the user more quickly and more accurately.

In order to solve the above technical problem, an aspect of an embodiment of the present invention provides a touch screen-based color acquisition method, the method comprising:

Detecting user contact with the touch screen;

Determining, according to the contact, a target area for performing color extraction when the detected contact corresponds to a predetermined touch operation;

Extracting color values of all colors included in the target area;

Displaying a corresponding color according to the extracted color value, so that the user can perform color selection according to the displayed color;

When the user selects the selected operation of the currently displayed color, the color selected by the user is obtained.

Preferably, the predetermined touch operation is a two-touch operation;

Determining, according to the contact, a target area for performing color extraction, specifically:

Obtaining coordinates of two touch points on the touch screen;

Calculating coordinates of a midpoint between the two touch points;

A circular range area centered on the midpoint and having a radius of a preset value is determined, and the circular range area is used as the target area for color extraction.

Preferably, before the displaying the corresponding color according to the extracted color value, the method further includes:

Save the extracted color values to a preset storage set;

The displaying the corresponding color according to the extracted color value, specifically:

The color values in the storage set are read and the color corresponding to the read color value is displayed.

Get the color value corresponding to the current background color;

When the color value corresponding to the current background color exists in the storage set, the color value corresponding to the current background color in the storage set is deleted.

Obtaining, by the number of pixels, the color corresponding to the color value stored in the storage set in the target area;

Sorting corresponding color values in the storage set according to the number of pixels; wherein color values corresponding to the number of pixels occupying a plurality of pixels are ranked first.

Preferably, the displaying the corresponding color according to the extracted color value, so that the user can perform color selection according to the displayed color, specifically including:

Displaying the (i-1) j+1th color value in the storage set to the i**th color through a color panel The color corresponding to the value; where the initial value of i is 1; j is a preset fixed value;

When the user switches to the current display color of the color panel, let i=i+1, and update the color displayed by the color panel according to the current i value;

When the user selects the selected operation of the currently displayed color, the color selected by the user is obtained, specifically:

When the user selects the selected operation of the color currently displayed by the color panel, the color selected by the user is acquired.

Correspondingly, an aspect of an embodiment of the present invention further provides a touch screen-based color acquiring device, where the device includes:

a contact detecting module for detecting contact between the user and the touch screen;

a target area determining module, configured to determine a target area for performing color extraction according to the contact when the detected contact corresponds to a predetermined touch operation;

a color value extraction module, configured to extract color values of all colors included in the target area;

a color display module, configured to display a corresponding color according to the extracted color value, so that the user can perform color selection according to the displayed color; and,

The color obtaining module is configured to acquire a color selected by the user when the user selects a selected operation on the currently displayed color.

Preferably, the predetermined touch operation is a two-touch operation;

The target area determining module specifically includes:

a touch point coordinate acquiring unit, configured to acquire coordinates of two touch points on the touch screen;

a midpoint coordinate calculation unit for calculating a coordinate of a midpoint between the two touch points; and

The target area determining unit is configured to determine a circular range area centered on the midpoint and having a radius of a preset value, and use the circular range area as the target area for performing color extraction.

Preferably, the device further comprises:

a color value saving module, configured to save the extracted color value to a preset storage set;

The color display module is specifically configured to:

Preferably, the device further comprises:

a background color value obtaining module, configured to obtain a color value corresponding to the current background color; and,

a background color value deletion module, configured to delete a color value corresponding to the current background color in the storage set when a color value corresponding to the current background color exists in the storage set.

Preferably, the device further comprises:

a pixel number obtaining module, configured to acquire a quantity of pixels occupied by a color corresponding to a color value stored in the storage set in the target area; and

The color value sorting module is configured to sort the corresponding color values in the storage set according to the number of pixels; wherein, the color values corresponding to the plurality of pixels are arranged first.

Preferably, the color display module specifically includes:

a color display unit for displaying, by using a color panel, a color corresponding to the (i-1) j+1 color values in the storage set to the i**j color values; wherein the initial value of i is 1; j is a preset fixed value; and,

a candidate color update unit, configured to: when the user switches to the current display color of the color panel, let i=i+1, and update the color displayed by the color panel according to the current value of i;

The color obtaining module is specifically configured to:

The implementation of the present invention has the following beneficial effects:

The method and device for acquiring a color based on a touch screen according to an embodiment of the present invention, by detecting contact between a user and a touch screen, determining a target area where a color that the user needs to select according to the contact, and extracting colors of all colors included in the target area. Value, and then display the corresponding color according to the extracted color value, filter the color to be selected based on the color value, and present it to the user, and then the user selects the color from the candidate color, which can be obtained more quickly and accurately. The color required by the user simplifies the process of obtaining the target color, improves the work efficiency, and improves the accuracy of the target color acquisition and enhances the user experience.

DRAWINGS

1 is a schematic flow chart of an embodiment of a touch screen-based color acquisition method provided by the present invention;

2 is a schematic structural diagram of an embodiment of a touch screen-based color acquiring device provided by the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

An aspect of an embodiment of the present invention provides a touch screen based color acquisition method.

FIG. 1 is a schematic flowchart diagram of an embodiment of a touch screen-based color acquisition method provided by the present invention, where the method includes the following steps:

S11. Detecting contact between the user and the touch screen;

In this embodiment, the user can touch the touch screen on the display device through the writing tool, for example, perform a writing operation on the touch screen, and slide the touch screen on the touch screen to input the writing track to the display device, and then display the corresponding information by the display device. The handwriting lines, or function control operations on the touch screen, such as two-point long press on the touch screen by a writing tool, two-click double-click, or click a function button set in a specific area of the touch screen to trigger the display device to respond accordingly Function control events. The display device may be a mobile phone, a smart tablet or a PC, and the writing tool may be a user's finger or an electronic pen used in conjunction with the display device, which is not specifically limited in the present invention.

S12. When the detected contact corresponds to a predetermined touch operation, determining a target area for performing color extraction according to the contact;

In this embodiment, a touch operation is predefined in the display device, and the touch operation is associated with a color acquisition event, and when the user touches the touch screen to match the predetermined touch operation, the display is triggered. The device responds to the color acquisition event, that is, performs steps S12 to S15; in a specific implementation, the touch operation may have various options, such as two-point long press on the touch screen, two-point double-click, and more than two long presses and multiple Double-clicking at two points, touching the contact area larger than the preset threshold and staying longer than the preset threshold, clicking a function button set in a specific area of the touch screen, and the like. It should be noted that, in the display device, a plurality of touch operations may be defined in advance, and each touch operation corresponds to one function control event. When detecting that the user's contact with the touch screen matches a predetermined touch operation, the display device is triggered to respond to the corresponding function control. For events, it is only necessary to ensure that the preset touch operations correspond to the function control events one by one, and do not conflict with each other.

In this embodiment, the user's contact with the touch screen of the display device not only plays a triggering role, but also includes the user's demand information for the color. Generally, when a two-point long press, a two-dot double-click, a long press of more than two points, or a double-click of more than two points is used to trigger a color acquisition event, the user places the color that needs to be selected in two touches. In the area between the points; when a touch operation is performed on the touch screen that the contact area is greater than the preset threshold and the dwell time exceeds the preset threshold to trigger the color acquisition event, the user places the color that needs to be selected in the area covered by the contact surface. When a function button for setting a specific area of the touch screen is clicked to trigger a color acquisition event, a target area selection box may be popped up on the display device, and the user may perform a movement operation on the touch screen to change the size of the selected area of the target area. And a position to place the color that the user wants to select in the selected frame of the target area; in summary, the target area for color extraction can be determined according to the contact of the user with the touch screen.

S13. Extract color values of all colors included in the target area;

In this embodiment, after the display device determines the target area according to the user's needs, the color value of the color included in the target area needs to be extracted. However, the size of the target area is related to the writing tool used by the user, for example, the user touches the touch screen with a finger. Since the coverage of the finger is relatively large, the target area may contain not only the target color that the user needs to extract, but also other colors. In order to more accurately obtain the color desired by the user, it is necessary to color all the colors included in the target area. The values are extracted. The method for extracting the color value may be: after determining the target area, taking a screenshot of the target area, and extracting the color values of the colors included in the image one by one, it is understood that how to extract the color value is prior art, here No further explanation. Among them, the color value refers to the RGB value of the color.

S14. Display a corresponding color according to the extracted color value, so that the user can display the color according to Make color selection;

In this embodiment, the display device displays the corresponding color on the display panel according to the extracted color value, and presents the color to the user, thereby the user can perform a color selection operation through the touch screen to select the color that is required by the user. In addition, there are various ways of displaying, for example, the display device displays the colors corresponding to all the color values extracted from the target area at one time.

S15. When the user selects the selected operation of the currently displayed color, the color selected by the user is obtained.

In this embodiment, the user selects the selection operation of the currently displayed color in real time, and when the user inputs a selection command for the currently displayed color to the display device through the touch screen (ie, the user performs a selection operation on the currently displayed color, for example, on the touch screen. When a click operation is performed on a position where a certain color is located, the display device acquires the color value corresponding to the color selected by the user and uses it as the color of the output handwriting of the next writing operation.

The method for acquiring a color based on a touch screen provided by the embodiment, by detecting contact between the user and the touch screen, determining a target area where the color that the user needs to select according to the contact, and extracting color values of all colors included in the target area, and then Displaying the corresponding color according to the extracted color value, filtering out the selected color based on the color value, and presenting the color to the user, and then the user selects the color from the candidate color, thereby obtaining the user's need more quickly and accurately. The color simplifies the process of obtaining the target color, improves the work efficiency, and improves the accuracy of the target color acquisition and enhances the user experience.

Preferably, the predetermined touch operation is a two-touch operation;

Obtaining coordinates of two touch points on the touch screen;

Calculating coordinates of a midpoint between the two touch points;

In this embodiment, the two-point touch operation is a two-point long-press operation, that is, when the display device detects that two contacts are simultaneously present on the touch screen and the duration exceeds a preset time threshold, the color acquisition event is triggered, first. Determine the target area, according to the user's operating habits, it will generally need to choose The selected color is placed in the area between the two touch points. Therefore, the midpoint of the line connecting the two touch points is taken as the center of the circle, and a predetermined value is used as the radius to determine a circular range area, as long as The preset value is selected appropriately. Usually, the color that the user wants to select is included in the circular range area. Preferably, the preset value may be slightly larger than half the length of the connection of the two touch points. In addition, the two-point touch operation can also be a two-click double-click operation, which is not described here.

Save the extracted color values to a preset storage set;

In this embodiment, the color values corresponding to all the colors included in the target area are extracted one by one, and at the same time, the extracted color values are saved one by one to a preset storage set, and in specific implementation, one side may be Extracting and saving, that is, extracting a color value, first saving the currently extracted color value to a preset storage set, and then extracting to a color, and then saving the currently extracted color value to a preset storage set. Until the color values corresponding to all the colors in the target area are saved to the preset storage set. In addition, the storage collection can be any of an array, a linked list, or a key-value pair.

It should be noted that, by saving the extracted color values to a preset storage set, the color values can be conveniently processed, such as deleting or sorting, which greatly improves the data processing efficiency.

Get the color value corresponding to the current background color;

It should be noted that if the current background color of the display device appears in the candidate color presented to the user, the user misselects the current background color, and the display device acquires the current background color, and uses the background color as the color of the output handwriting of the next writing operation. When the user performs a writing operation, the handwriting of the writing will not be displayed normally, and the user experience is not good.

In this embodiment, before the corresponding color is displayed according to the extracted color value, the color value corresponding to the current background color in the storage set is deleted, and therefore, the current background color of the display device will not be As the candidate color is displayed, the user can no longer select the current background color, which effectively reduces the probability of user misoperation and improves the accuracy of color acquisition. In addition, when the color value corresponding to the current background color is extracted, the color value corresponding to the current background color is not saved to the storage set, and the above problem can also be solved, and the specific implementation process is not described here.

It should be noted that, when the target area is directly determined by the display device according to the user's contact, instead of triggering the color acquisition event by the user through a predetermined touch operation, the user is required to participate in the determination of the target area, according to the user's operating habits. Generally, the user touches at a position where the number of pixels of the color to be selected is large. Therefore, in general, the number of pixels occupying a large number of pixels in the target area is more likely to be the color that the user needs to select.

Therefore, in the present embodiment, the corresponding color values in the storage set are sorted according to the number of pixels, and the colors occupying a large number of pixels are arranged in front, so that the display device can correspond to the color values arranged in the front. The color is displayed in a more conspicuous position (for example, in the front of the color panel), or in a more conspicuous way (for example, occupying a larger display area in the color panel), which helps the user to Quickly select the color that the user needs in the candidate color, which effectively improves work efficiency.

Displaying, by the color panel, the color corresponding to the (i-1) j+1th color value to the i**j color value in the storage set; wherein, the initial value of i is 1; j is a preset fixed Numerical value

When the user selects the selected operation of the currently displayed color, the user selects the selected face Color, specifically:

In this embodiment, a plurality of methods may be used for color display, for example, a color panel is popped up, and the color panel displays only a preset number of colors at a time. Specifically, the color panel reads the preset number of color values arranged in the storage set, and displays the color corresponding to the currently read color value, if the user does not select the color currently displayed in the color panel. Color, the display device then reads the preset number of color values in the unread color values in the storage set according to the user's switching operation on the color panel, and displays the currently read color values. The corresponding color, and so on, until the user selects the currently displayed color, obtains the color selected by the user, or has no color value that has not been read in the storage set, but the user still does not select the currently displayed color, and then determines Color acquisition failed. In addition, according to the order in which the color values are read, the color display may be performed in order, that is, the color corresponding to the color value read first is arranged in the front position in the color panel, which is beneficial to attract the attention of the user and help the user to further Quickly make color selections. And when the user performs a switching operation on the color currently displayed by the color panel, the color value that has been read in the storage set may be deleted, thereby reducing the occupation of the storage space.

Correspondingly, an aspect of the embodiment of the present invention further provides a touch screen-based color obtaining device, which can implement all the processes in the touch screen-based color obtaining method provided by one aspect of the embodiments of the present invention.

2 is a schematic structural diagram of an embodiment of a touch screen-based color obtaining apparatus provided by the present invention, where the apparatus includes:

The contact detecting module 11 is configured to detect a contact between the user and the touch screen;

a target area determining module 12, configured to determine, according to the contact, a target area for performing color extraction when the detected contact corresponds to a predetermined touch operation;

a color value extraction module 13 for extracting color values of all colors included in the target area;

a color display module 14 configured to display a corresponding color according to the extracted color value, so that the user can perform color selection according to the displayed color; and,

The color obtaining module 15 is configured to acquire a color selected by the user when the user selects a selected operation on the currently displayed color.

Preferably, the predetermined touch operation is a two-touch operation;

The target area determining module 12 specifically includes:

Preferably, the device further comprises:

The color display module 14 is specifically configured to:

Preferably, the storage set may be any one of an array, a linked list, or a key-value pair.

Preferably, the device further comprises:

Preferably, the color display module 14 specifically includes:

a color display unit for displaying, by using a color panel, a color corresponding to the (i-1) j+1 color values in the storage set to the i**j color values; wherein the initial value of i is 1; j is a preset fixed value;

The color obtaining module 15 is specifically configured to:

The above is a preferred embodiment of the present invention, and it should be noted that those skilled in the art can also make several improvements and modifications without departing from the principles of the present invention. It is the scope of protection of the present invention.

One of ordinary skill in the art can understand that all or part of the process of implementing the foregoing embodiments can be completed by a computer program to instruct related hardware, and the program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM), or a random access memory (RAM).

Claims

A touch screen-based color acquisition method, comprising:

Detecting user contact with the touch screen;

Determining, according to the contact, a target area for performing color extraction when the detected contact corresponds to a predetermined touch operation;

Extracting color values of all colors included in the target area;

Displaying a corresponding color according to the extracted color value, so that the user can perform color selection according to the displayed color;

When the user selects the selected operation of the currently displayed color, the color selected by the user is obtained.
The touch screen-based color acquisition method according to claim 1, wherein the predetermined touch operation is a two-touch operation;

Determining, according to the contact, a target area for performing color extraction, specifically:

Obtaining coordinates of two touch points on the touch screen;

Calculating coordinates of a midpoint between the two touch points;

A circular range area centered on the midpoint and having a radius of a preset value is determined, and the circular range area is used as the target area for color extraction.
The touch screen-based color acquisition method according to claim 1, wherein before the displaying the corresponding color according to the extracted color value, the method further comprises:

Save the extracted color values to a preset storage set;

The displaying the corresponding color according to the extracted color value, specifically:

The color values in the storage set are read and the color corresponding to the read color value is displayed.
The touch screen-based color acquisition method according to claim 3, wherein before the displaying the corresponding color according to the extracted color value, the method further comprises:

Get the color value corresponding to the current background color;

When the color value corresponding to the current background color exists in the storage set, the color value corresponding to the current background color in the storage set is deleted.
The touch screen-based color acquisition method according to any one of claims 3 to 4, wherein before the displaying the corresponding color according to the extracted color value, the method further comprises:

Obtaining, by the number of pixels, the color corresponding to the color value stored in the storage set in the target area;

Sorting corresponding color values in the storage set according to the number of pixels; wherein color values corresponding to the number of pixels occupying a plurality of pixels are ranked first.
The touch screen-based color acquisition method according to claim 5, wherein the displaying the corresponding color according to the extracted color value, so that the user can perform color selection according to the displayed color, specifically includes:

Displaying, by the color panel, the color corresponding to the (i-1) j+1th color value to the i**j color value in the storage set; wherein, the initial value of i is 1; j is a preset fixed Numerical value

When the user switches to the current display color of the color panel, let i=i+1, and update the color displayed by the color panel according to the current i value;

When the user selects the selected operation of the currently displayed color, the color selected by the user is obtained, specifically:

When the user selects the selected operation of the color currently displayed by the color panel, the color selected by the user is acquired.
A touch screen-based color acquiring device, comprising:

a contact detecting module for detecting contact between the user and the touch screen;

a target area determining module, configured to determine a target area for performing color extraction according to the contact when the detected contact corresponds to a predetermined touch operation;

a color value extraction module, configured to extract color values of all colors included in the target area;

a color display module, configured to display a corresponding color according to the extracted color value, so that the user can perform color selection according to the displayed color; and,

The color obtaining module is configured to acquire a color selected by the user when the user selects a selected operation on the currently displayed color.
The touch screen-based color acquiring device according to claim 7, wherein the predetermined touch operation is a two-touch operation;

The target area determining module specifically includes:

a touch point coordinate acquiring unit, configured to acquire coordinates of two touch points on the touch screen;

a midpoint coordinate calculation unit for calculating a coordinate of a midpoint between the two touch points; and

The target area determining unit is configured to determine a circular range area centered on the midpoint and having a radius of a preset value, and use the circular range area as the target area for performing color extraction.
The touch screen-based color obtaining device according to claim 8, wherein the device further comprises:

a color value saving module, configured to save the extracted color value to a preset storage set;

a pixel number obtaining module, configured to acquire a quantity of pixels occupied by a color corresponding to a color value stored in the storage set in the target area; and

The color value sorting module is configured to sort the corresponding color values in the storage set according to the number of pixels; wherein, the color values corresponding to the plurality of pixels are arranged first.
The touch screen-based color obtaining device of claim 9, wherein the color display module comprises:

a color display unit for displaying, by using a color panel, a color corresponding to the (i-1) j+1 color values in the storage set to the i**j color values; wherein the initial value of i is 1; j is the default fixed Value; and,

a candidate color update unit, configured to: when the user switches to the current display color of the color panel, let i=i+1, and update the color displayed by the color panel according to the current value of i;

The color obtaining module is specifically configured to:

When the user selects the selected operation of the color currently displayed by the color panel, the color selected by the user is acquired.