CN100444099C - Screenshot method, screenshot device and instant messaging client - Google Patents

Abstract

The invention discloses a screenshot method, which comprises: A. determining the initialization selection area in the screen background image; B. recording the movement track of the mouse in the initialization selection area, and determining the area surrounded by the mouse movement track as the selection area; C. . Saving the range corresponding to the selected area in the screen background image as the selected area image. Through the implementation of the present invention, images of arbitrary shapes drawn by moving the mouse can be intercepted. The present invention can also carry out real-time editing on the image of the selected area, which avoids the user from explaining the content in the image through complicated means, and greatly facilitates the use of the user. Furthermore, the present invention can be applied to an instant messaging client, so that a user can capture an image of any shape through the instant messaging client and send it to other instant messaging clients.

Description

Screenshot method, screenshot device and instant messaging client

technical field

The invention relates to the technical field of image processing, in particular to a screenshot method, a screenshot device and an instant messaging client.

Background technique

With the development of Internet technology, Instant Messaging (IM) tools have become indispensable network tools for the majority of network users. The IM tool realizes instant communication on the Internet through peer-to-peer technology, even a group chat of several users.

In the process of using IM tools to communicate, users not only need to send text messages to the other party, but also need to send image information to the other party. The image information can be a pre-saved image file, or it can be instantly downloaded from the background image of the current computer screen. Captured image.

Among existing IM tools, some IM tools can already provide a screenshot function. The user clicks the capture screen button in the tool bar of the IM tool chat window to enter the screen capture interface, and then selects the target capture with the left mouse button, that is, after pressing the left mouse button, move the mouse from the coordinates (x1, y1) to the coordinates (x2, y2), then take the rectangle surrounded by four straight lines x=x1, x=x2, y=y1, y=y2 as the boundary to intercept the image, then double-click the left button in the selected range to determine the captured image, The selected image is automatically imported into the input field of the chat window. During the capture process, the user can also use the right mouse button or the keyboard's Esc key to exit the capture.

However, the screenshot function of the existing IM tool has the following disadvantages:

1) It only provides the screen background that the user intercepts in a rectangular shape, and the flexibility is not good. For example, when a user captures a screen, he or she may only want the other party to see a certain part of the screen while others cannot be seen. Screen captures selected with a rectangular shape cannot handle such problems flexibly.

2) Immediate editing cannot be performed after the screenshot. Sometimes the user needs to explain the screenshot, and when giving more prompts to the other party, he also needs to input a lot of words in the text information input box to explain clearly. For example, if a user captures an image of a group photo of multiple people and wants the other party to know the names of each person, the user also needs to describe in the text information input box: "The first one on the left is Zhang San, and the penultimate one on the right is Li Si ".

Contents of the invention

In view of this, the present invention proposes a screenshot method for capturing images of arbitrary shapes. Another object of the present invention is to provide a screenshot device. Another object of the present invention is to provide an instant messaging client.

According to the above purpose, the present invention provides a screenshot method, the method comprising:

A. Determine the initialization selection area in the screen background image;

B. Record the moving track of the mouse in the initialization selection area, and determine the area surrounded by the mouse movement track as the selection area;

C. Save the range corresponding to the selected area in the screen background image as the selected area image.

The step B includes: adding a mark to the coordinates of the mouse movement track, traversing the coordinates of the initialization selection area line by line, and recording the corresponding coordinates as the start coordinates of the selection area boundary when the mark is encountered for the odd number of times in each row, and for the even number of times When encountering the mark, record the corresponding coordinates as the end coordinates of the selection area boundary, and record the area between the adjacent start coordinates and the end coordinates as the selection area of the row; or, add a mark to the coordinates passed by the mouse movement track, and Traversing the coordinates of the initial selection area by traversing the column, recording the corresponding coordinates when the mark is encountered in odd numbers in each column as the start coordinates of the selection area boundary, and recording the corresponding coordinates as the end coordinates of the selection area boundary when the mark is encountered in the even number of times , and record the area between the adjacent start coordinates and end coordinates as the selection area of the column.

Step B further includes the step of moving said constituency within the initial constituency.

Step C further includes the step of editing the selected area image.

The saving in step C includes: obtaining the minimum and maximum values of the abscissa and the minimum and maximum values of the ordinate of the selected area, and determining a rectangular image, which at least includes the minimum and maximum values of the abscissa and A rectangle defined by the minimum value and maximum value of the ordinate; read the selection image and add it to the rectangle image; save the rectangle image as the selection image.

After step C, it further includes: sending the image of the selected area through an instant messaging tool.

The present invention also provides a screenshot device, which includes a keyboard and mouse event capture module, a selected area determination module, and an image processing module, wherein:

The keyboard and mouse event capture module is used to record the mouse movement track and provide it to the selection area determination module;

A selection area determination module, configured to determine the area enclosed by the mouse movement track as a selection area;

The image processing module is used to save the range corresponding to the selection area in the screen background image as the selection area image.

The device further includes: an image instant editing module, configured to edit the selected area image.

The keyboard and mouse event capture module is further used to obtain the starting point and target point of mouse dragging after determining the selected area; the selected area determining module further moves the selected area according to the starting point and target point.

The present invention also provides an instant messaging client including the above screenshot device, and the instant messaging client also includes a client communication module, configured to send the image of the selection area.

As can be seen from the above scheme, since the present invention records the mouse movement trajectory when selecting a region, the area surrounded by the mouse movement trajectory is determined as a selection region, and the range corresponding to the selection region in the screen background image is saved as a selection region image, Thus, images of arbitrary shapes drawn by mouse movement can be intercepted. The present invention can also move the selection area after the selection area is determined, so that the user does not need to draw the selection area with the mouse again when the selection area is determined to be deviated, but only needs to move the original selection area to the position where the image is to be intercepted. The present invention can also carry out real-time editing on the image of the selected area, which avoids the user from explaining the content in the image through complicated means, and greatly facilitates the use of the user. Further, the present invention can be applied to an instant messaging client, so that a user can capture an image of any shape through the instant messaging client and send it to other instant messaging clients.

Description of drawings

FIG. 1 is a schematic diagram of a screenshot device in an embodiment of the present invention;

FIG. 2 is a schematic diagram of determining a selected area through a mouse movement track in an embodiment of the present invention;

3 is a schematic diagram of function buttons provided by the image instant editing module in an embodiment of the present invention;

FIG. 4 and FIG. 5 are schematic diagrams of editing a selected area image in an embodiment of the present invention;

FIG. 6 is a schematic diagram of a selected area image obtained in an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an instant messaging client in an embodiment of the present invention;

Fig. 8 is a schematic flowchart of an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solution and advantages of the present invention clearer, the following examples are given to further describe the present invention in detail.

FIG. 1 is a schematic structural diagram of a screenshot device 100 in an embodiment of the present invention. Referring to FIG. 1 , the screenshot device 100 includes a keyboard and mouse event capture module 10 , a selection area determination module 20 , an image processing module 30 , and may further include an image instant editing module 40 .

In the screenshot device 100 shown in FIG. 1 , the keyboard and mouse event capture module 10 mainly receives keyboard and mouse events, such as recording the mouse movement track and providing it to the selected area determination module 20; receiving keyboard input and mouse input, such as keyboard input Exit (Esc), carriage return (Enter), dragging, left-clicking, right-clicking, left-clicking, etc., and provide them to the selection area determination module 20 .

The selected area determining module 20 determines the area enclosed by the mouse movement track as the selected area. Before that, the initial selected area can also be determined in the screen background pattern, and usually the initial selected area is determined as the entire screen background image.

The method for the selection area determination module 20 to determine the selection area is as follows: when determining the initialization selection area, the marks of all pixel point coordinates in the screen are set to 0, and after receiving the mouse movement track sent by the keyboard and mouse event capture module 10, the mouse movement track passes through If the mark of the coordinate is set to 1, then in the whole screen, the coordinates of the pixels passed by the mouse movement track are marked as 1, and the coordinates of the pixels not passed by the mouse are still marked as 0; then traverse the coordinates of the initialization selection area line by line, in each line When the coordinate marked as 1 is encountered for the odd number of times, the corresponding coordinate is recorded as the start coordinate of the constituency boundary, and when the coordinate marked as 1 is encountered for the even number of times, the corresponding coordinate is recorded as the end coordinate of the constituency boundary, And record the area between the adjacent start coordinates and end coordinates as the selection area of the line, for example, the area between the coordinates marked as 1 for the first time and the coordinates marked as 1 for the second time or the fifth time in a certain line The area between the coordinate of 1 and the sixth coordinate marked as 1; after traversing line by line, the selection area of the entire screen is obtained. FIG. 2 is a schematic diagram of determining a selected area through the moving track of the mouse. In FIG. 2 , the mouse shown by a pencil moves on the background image of the screen to form an irregular circle, which is determined as the selected area.

Of course, when determining the selected area, the coordinates can also be traversed column by column, and the specific implementation is similar to the row by row traversal, which will not be repeated here.

Further, after determining the selected area, if the keyboard and mouse event capture module 10 captures the mouse drag information, and sends the starting point and target point coordinates of the mouse drag to the selected area determining module 20, then the selected area determining module 20 can further determine according to the starting point and The coordinates of the target point move the selection area and maintain the shape of the selection area. To put it simply, it is to calculate the difference between the coordinates of the target point and the coordinates of the starting point, and then add the difference to all the coordinates of the selected area. If the selection area has not been determined, the selection area is determined according to the dragging track of the mouse.

The image processing module 30 is configured to save the range corresponding to the selection area in the screen background image as the selection area image. After the selected area is determined, the image processing module 30 covers the part outside the selected area with a certain transparent color, thereby distinguishing it from the selected area. Further, when the mouse moves into the selected area, the shape of the mouse can be displayed as a cursor that can be dragged , and displays the mouse shape as a pencil when the mouse moves outside the selection. When the keyboard and mouse event capture module 10 receives a double-click of the mouse, the image processing module 30 obtains the abscissa minimum value Xmin, the abscissa maximum value Xmax, the ordinate minimum value Ymin and the ordinate maximum value Ymax of the selected area, and then determines a rectangular image, The four vertices of the rectangular image can be (Xmin, Ymin), (Xmin, Ymax) (Xmax, Ymin) (Xmax, Ymax), and can also be larger than the rectangle determined by these four points, that is to say the determined rectangle At least these four points must be included, and the constituency is obviously within this rectangle. Afterwards, the image processing module 30 reads the image of the selected area, adds the read image of the selected area to the above determined rectangular image, and then saves it, thus realizing the preservation of the image of the selected area.

Continuing to refer to FIG. 1 , the screenshot device 100 in the embodiment of the present invention may further include an image instant editing module 40 for editing the selected area image. The functions provided by the instant image editing module 40 are similar to those of general image editing software, such as pencils, erasers, straight lines, straight arrows, rectangles, circles, text boxes, color selection and highlighting. The image instant editing module 40 displays buttons corresponding to these functions on the screen. These buttons are shown in FIG. 3 . After receiving the information that the user selects a button, the corresponding function unit is called to edit the graphics. For example, as shown in Figure 4, in Figure 4, the pencil function is used to write and draw on the selected area image, and the eraser function can also be used to erase the written words, and the color selection function can also be used to select pencils, straight lines, straight arrows, The color of rectangles, circles, text boxes, etc. As shown in Figure 5, from left to right in the figure are the functions of rectangle, circle, text box, and straight arrow. FIG. 6 is a schematic diagram of a selected area image obtained in an embodiment of the present invention.

FIG. 7 is a schematic structural diagram of an instant messaging client 200 in an embodiment of the present invention. Referring to FIG. 7 , the instant messaging client 200 includes a client communication module 50 and a screenshot device 100 . Wherein the client communication module 50 is an important part of the instant messaging client, this module mainly integrates functions such as text chat communication, picture transmission, audio/video transmission, in the embodiment of the present invention, the client communication module 50 provides a screenshot device 100, and after the screenshot device 100 provides the selected area image to the client communication module 50, the client communication module 50 imports the selected area image into the chat window input box, and then sends the selected area image to the other party.

Fig. 8 is a schematic flowchart of an embodiment of the present invention. Here, the screenshot process of the embodiment of the present invention is described by taking the instant messaging client shown in FIG. 7 as an example, and the process includes the following steps:

From step 101 to step 102, the user selects and clicks on the entry of the screenshot device 100 in the client communication module 50, triggers the screenshot device 100 to perform a screenshot function, and the screenshot device 100 enters a screenshot state.

Step 103 , the selected area determination module 20 determines that the initial selected area is the entire screen, that is, the image of the selected area is the background image of the entire screen at this time, and provides the initial selected area image to the image processing module 30 .

Step 104, the image instant editing module 40 edits the selected area image, for example: use the pencil function to write and draw; use the eraser function to erase some content of the selected area image; The straight line of the arrow; use the rectangle or circle function to add a rectangular frame or circle to the selection image to circle part of the content in the selection image; use the text box to add text content to the selection image; use the highlight function to highlight the selection area Part or all of an image; use the color selection feature to choose the color of pencils, lines, line arrows, rectangles, circles, text, and highlights.

Step 105, the keyboard and mouse event capture module 10 captures the keyboard and mouse event, and if it is mouse dragging that is captured, then step 108 is performed; if the mouse that is captured is double-clicked, then step 111 is performed: if what is captured is the right mouse button, keyboard Esc, etc. For other signals, go to step 106.

Step 106, the keyboard and mouse event capture module 10 transmits the captured signal to the selected area determination module 20, and the selected area determination module 20 judges whether the selected area has been determined, and if it is determined, then executes step 103; otherwise, executes step 107, exits the screen capture state, and ends this program process.

Step 108, the keyboard and mouse event capture module 10 transmits the captured mouse dragging information to the selected area determination module 20, and the selected area determination module 20 judges whether the selected area is determined, and if yes, executes step 109; otherwise, executes step 110.

Step 109 , the selected area determination module 20 moves the selected area according to the starting point and target point dragged by the mouse, and keeps the shape of the selected area unchanged, and then executes step 104 .

Step 110 , the selection area determination module 20 determines the selection area according to the dragging track, and then executes step 104 .

In step 111, the image processing module 30 imports the selected area image into the chat window input box of the client communication module 50, and then the client communication module 50 sends the selected area image to the instant messaging peer.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (10)

1. A screenshot method, characterized in that the method comprises: A. Determine the initialization selection area in the screen background image; B. Record the moving track of the mouse in the initialization selection area, and determine the area surrounded by the mouse movement track as the selection area; C. Save the range corresponding to the selected area in the screen background image as the selected area image. 2. The method according to claim 1, wherein said step B comprises: Add a mark to the coordinates of the mouse movement track, traverse the coordinates of the initial selection area line by line, record the corresponding coordinates as the start coordinates of the selection area boundary when the mark is encountered for the odd number of times in each row, and when the mark is encountered for the even number of times Record the corresponding coordinates as the end coordinates of the selection boundary, and record the area between the adjacent start coordinates and end coordinates as the selection area of the line; or, Add a mark to the coordinates of the mouse movement track, traverse the coordinates of the initialization selection area column by column, record the corresponding coordinates as the start coordinates of the selection area boundary when the mark is encountered for the odd number of times in each column, and the mark is encountered for the even number of times Record the corresponding coordinates as the end coordinates of the selection boundary, and record the area between the adjacent start coordinates and end coordinates as the selection area of the column. 3. The method according to claim 1, wherein step B further comprises the step of moving said selection area within the initial selection area. 4. The method according to claim 1, characterized in that step C further comprises the step of editing the selected area image. 5. The method according to claim 1, wherein the saving in step C comprises: Obtain the minimum and maximum values of the abscissa and the minimum and maximum values of the ordinate of the selected area, and determine a rectangular image, which at least includes the minimum and maximum values of the abscissa and the minimum and maximum values of the ordinate bounding rectangle; Read the selection image and add it to the rectangle image; Save the rectangle image as a selection image. 6. The method according to claim 1, characterized in that, after step C, further comprising: Send the selection image via instant messenger. 7. A screenshot device, characterized in that the device includes a keyboard and mouse event capture module, a selected area determination module, and an image processing module, wherein: The keyboard and mouse event capture module is used to record the mouse movement track and provide it to the selection area determination module; A selection area determination module, configured to determine the area enclosed by the mouse movement track as a selection area; The image processing module is used to save the range corresponding to the selection area in the screen background image as the selection area image. 8. The device according to claim 7, further comprising: The image instant editing module is used for editing the selected area image. 9. The device of claim 7, wherein: The keyboard and mouse event capture module is further used to obtain the starting point and target point of mouse dragging after determining the selected area; The selection area determining module further moves the selection area according to the starting point and the target point. 10. An instant messaging client comprising the screenshot device according to any one of claims 7 to 9, characterized in that the instant messaging client further comprises a client communication module configured to send the image of the selection area.

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