TWI410888B - Real-time image capturing method for multimedia data and application program - Google Patents

Abstract

A real-time image capturing method for multimedia data is used in a computer. An application program is installed in the computer for providing a captured function. User marks a user-defined area upon a window page by using the captured function and a transparent mask layer is produced in the user-defined area. The application program captures image under the transparent mask layer based on the user-defined area. The application program then pastes the captured image to the transparent mask layer for converting the transparent mask layer into a copied image. Therefore, the copied image can be used by the application program.

Description

Instant image capture method and application program for multimedia materials

The invention relates to an image capturing method, and more particularly to an image capturing method for capturing images of multimedia materials.

With the advent of the digital age, there are many school institutions or tutoring classes that have begun to use digital devices and teaching materials to teach, so that the students can get a more convenient and more interesting learning environment.

For example, a teacher can make a digital teaching material and play it through a whiteboard device or a computer's projection system for digital teaching. The advantage of this kind of digital teaching is that teachers can collect a wealth of information through the Internet to produce digital textbooks, and it is not limited to the standard textbooks published by the publishers. In addition, during the class, the content of the textbook is projected onto the big screen through the projector, which makes the students more clear. Furthermore, taking the electronic whiteboard device as an example, the key points or notes made by the teacher during the lecture can be arbitrarily cleared or stored, and then the digital files are output to the students after the class. This will help review after class.

The above-mentioned electronic whiteboard device has quite a plurality of functions. For example, a teacher can embed multimedia materials in a digital teaching material, such as a movie or a Flash animation, and explain some segments after the video is played. However, for example, playing a teaching video, and If the teacher pauses the video during the video playback, the video screen is captured so that the commentary after the playback is finished will affect the smoothness of the video playback. Furthermore, if the video teaching page is interspersed in the digital teaching process, the page does not have a pause function for use. At this time, the teacher cannot capture the video teaching screen, which may cause trouble for the following explanation.

In view of this, some digital teaching-related research has proposed some technical solutions to solve the above problems. For example, the invention patent of the Republic of China Patent No. I284824 (hereinafter referred to as the '824 case) discloses a method for extracting composite multimedia content. The '824 case is to install a digital teaching board system in an information processing device (such as a computer), and the digital teaching board system provides a user information board teaching module for the user to use the data set teaching. The functions in the module are set and set. The data kit teaching module can be used to retrieve text, video, graphics, sound and web content, etc., so that users can access the data to facilitate the production of digital teaching materials.

However, although the method disclosed in the above '824 case can be used to capture images of multimedia materials, the steps are quite cumbersome and impractical. The method disclosed in the '824 case requires at least steps: opening the data set teaching module; adjusting the size of the data set teaching module; adjusting the position of the data set teaching module; selecting a piece of information to select Capture the entire board, the entire desktop, or a self-selected area; perform an image capture of the multimedia material.

The method disclosed in the '824 case is complicated and takes a lot of time. If the picture used to capture the video is as described above, it is necessary to pause the movie to successfully capture the specific picture desired. However, in the case of a paused movie, Taking pictures can be achieved in quite a few ways. Obviously, although the '824 case revealed a novel method of extraction, it still could not solve the above problems.

The main purpose of the present invention is to provide an instant image capturing method and an application program for multimedia data, which can arbitrarily capture images of a multimedia material in a custom range.

To achieve the above object, the present invention is applied to a computer. The computer can provide a capture function through the application, so that the user can select a custom range in the window page by using the capture function, and generate a transparent mask layer in the custom range. Then, the application performs an image capturing operation according to the customized range to capture the image under the transparent mask layer, and pastes the captured image onto the transparent mask layer to convert into a duplicate image.

The effect that the present invention can achieve in comparison with the prior art is that when the user plays the video, the user can capture the image in the customized range in the movie without stopping the playing, so as not to affect the playing and viewing of the movie. Moreover, if the user opens a window page for operation, the present invention can directly capture the image of the background under the window page without narrowing or minimizing the window page, so as not to affect the smoothness of the lecturer teaching. In this way, combining the method of the present invention with a teaching system such as an electronic whiteboard can increase the convenience of teaching and effectively increase the interest of learning.

1‧‧‧ computer

11‧‧‧Background

2‧‧‧Projector

3‧‧‧projection screen

4‧‧‧Application

41‧‧‧Windows page

42‧‧‧Tools

421‧‧‧Circle tools

43‧‧‧Playing a video

A1‧‧‧Custom range

I1‧‧‧ Copying images

T1‧‧‧Transparent mask layer

S20~S40‧‧‧Steps

The first figure is an architectural diagram of a preferred embodiment of the present invention.

The second drawing is a flow chart of a preferred embodiment of the present invention.

The third figure is a first schematic diagram of a preferred embodiment of the present invention.

The fourth figure is a second schematic view of a preferred embodiment of the present invention.

Figure 5 is a third schematic view of a preferred embodiment of the present invention.

Figure 5B is a third schematic view of another preferred embodiment of the present invention.

Figure 6 is a fourth schematic view of a preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE INVENTION A preferred embodiment of the present invention will be described in detail with reference to the drawings.

Referring first to the first figure, an architectural diagram of a preferred embodiment of the present invention is shown. The present invention is mainly applied to a digital teaching environment, and the digital teaching architecture can mainly include a computer 1, a projector 2, and a projection screen 3. The projector 2 is electrically connected to the computer 1, receives the screen output by the computer 1, and projects externally. The projection screen 3 receives the projection of the projector 2, and if the projection screen 3 is an electronic whiteboard device, the projection screen 3 is electrically connected to the computer 1 to perform the user on the projection screen 3. The operation action is returned to the computer 1.

The computer 1 is provided with an application 4, which is mainly an electronic whiteboard software for digital teaching, but is not limited. The user can operate the application 4 through the peripheral device of the computer 1, such as a keyboard and a mouse (not shown), and display it on the screen of the computer 1, or project to the projection screen 3 via the projector 2. Moreover, if the projection screen 3 is an electronic whiteboard device, the user can operate the application 4 on the projection screen 3 through an electronic whiteboard pen (not shown) for digital teaching.

Referring to the second figure, a flow chart of a preferred embodiment of the present invention is shown. First of all The user installs and executes the application 4 in the computer 1 (step S20), and starts a retrieval function in the application 4 (step S22). Then, the application 4 can automatically or manually set the transmittance (Opacity) of a window page 41 (as shown in the third figure) (step S24). When the transparency of the window page 41 is adjusted to zero, the window page 41 will be regarded as transparent, and the user can select the background 11 under the window page 41 through the mouse (as shown in the fourth figure).

Then, the user can select a custom range A1 (as shown in FIG. 5A or FIG. 5B) in a state where the capture function is turned on (step S26). Moreover, the application 4 generates a transparent mask layer T1 (as shown in FIG. 5A or FIG. 5B) in the custom range A1 (step S28).

It is worth mentioning that the main purpose of the present invention is to capture an image of a multimedia material. Therefore, if the multimedia material is displayed on the window page 41, the step S24 is not necessary; and if the multimedia material is displayed in the Under the window page 41, in order to save the user's trouble (for example, moving the window page 41, or minimizing it), the step S24 can be selectively performed to facilitate the action of the capture.

After the step S28, the application 4 performs an image capturing operation according to the custom range A1 (step S30), that is, capturing an image of the multimedia material displayed under the customized range A1. The image of the multimedia material may be a dynamic movie, a static text, a picture, a window page, a background, or a combination thereof, and is not limited. Next, the application 4 copies the captured captured image onto the transparent mask layer T1 (step S32) to convert the transparent mask layer T1 into a duplicate image I1 (as shown in the sixth figure). (Step S34).

Then, if the transmittance of the window page 41 has been adjusted in the step S24, the application 4 automatically responds to the transmittance of the window page 41 after the step S34 (step S36). Then, the copy image I1 is displayed above the window page 41 (step S38). Finally, the user can directly use the copy image I1 on the window page 41 to facilitate the digital teaching. For example, the copied image I1 is pasted on the window page 41, moved, enlarged, reduced, rotated, cropped, marked or stored, and the copied image I1 and the like.

Next, please refer to the third figure, which is a schematic diagram of a first action of a preferred embodiment of the present invention. After the computer 1 installs and executes the application 4, a window page 41 under the application 4 can be opened. For example, if the application 4 is an electronic whiteboard software, the window page 41 can be an edited digit. teaching material. The application 4 also provides a toolbar 42 for the user to use the plural functions provided by the application 4. For example, the window 42 can be used to write, draw, map and embed the video on the window page 41. Wait. In the present invention, the user can mainly press a snap button (not shown) on the toolbar 42 to open the capture function.

Referring to the fourth figure, a second operation diagram of a preferred embodiment of the present invention is shown. If the multimedia material that the user wants to capture is displayed on the window page 41, the step S26 described above may be directly performed to select the customized range A1. If the multimedia material to be captured is displayed under the window page 41, the transparency of the window page 41 can be automatically adjusted by the application or manually by the user. When the transparency of the window page 41 is adjusted to zero, the window page 41 will be considered transparent by the computer 1, and the user can see through the background 11 directly under the window page 41. For example, as shown in the fourth figure, the background 11 under the window page 41 is a window job. The system's desktop (Desktop) and a play movie 43.

Referring to FIG. 5A, a third schematic diagram of a preferred embodiment of the present invention is shown. After the user opens the capture function according to the step S22 described above, the circle selection tool 421 provided by the application 4 can be used, and the selection operation of the step S26 can be performed through the circle selection tool 421. As shown in the fifth diagram A, the selected custom range A1 can be a rectangular range having a fixed aspect ratio. Furthermore, as shown in FIG. 5B, a third schematic diagram of another preferred embodiment of the present invention is shown. The user can also arbitrarily select the desired area through the circle selection tool 421 to form an irregular range, which cannot be limited.

When the custom range A1 is selected, the application 4 will generate the transparent mask layer T1. The position, size and range of the transparent mask layer T1 are determined according to the custom range A1. Then, the application 4 draws an image of the multimedia material under the transparent mask layer T1 according to the custom range A1. The custom range A1, the transparent mask layer T1, and the captured image system have the same range size.

As described above, if the computer 1 is operated by a Windows operating system (Windows OS) developed by Microsoft, the above-mentioned application 4 can perform the capture operation through the Windows application interface (Windows). Application Program Interface, Windows API) to execute. Further, it can be executed through the ScreenShot API in the Windows API, but it is not limited.

Finally, please refer to the sixth figure, which is a schematic diagram of a fourth operation of a preferred embodiment of the present invention. The application 4 copies the captured image onto the transparent mask layer T1 to convert the transparent mask layer T1 into the duplicate image I1. If you are doing it before you take it The transparency of the window page 41 has been adjusted, then the application 4 will return The transparency of the window page 41 is restored, and the copied image I1 is displayed on the window page 41. In this way, the user can use the copy image I1 on the window page 41 to facilitate the digital teaching. For example, the important picture in the play movie 43 is taken out, the window page 41 is pasted, and enlarged, cut, and marked, etc., to highlight the key parts of the picture, so as to facilitate the understanding of the students.

It is worth mentioning that, in the method of the present invention, the selection of the custom range A1, the generation of the transparent mask layer T1, the image capture of the multimedia material, and the conversion of the duplicate image I1 can all be performed in an instant. carry out. Moreover, if the multimedia material is the movie shown in the fourth figure, the method of capturing the present invention does not have a delay effect on the playback of the movie. Therefore, if the user uses the method of the present invention to capture the picture of the movie, it is not necessary to pause the playing of the movie, which will make the user more convenient.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, equivalent changes to the scope of the present invention are included in the scope of the present invention. Bright.

S20~S40‧‧‧Steps

Claims (8)

An instant image capture method for multimedia data is applied to a computer in which an application is installed and executed. The instant image capture method includes: a) enabling a capture function of the application; b) After the capturing function is turned on, the transmittance of a currently displayed window page is adjusted to zero; c) a custom range is selected under the capturing function, wherein the capturing function penetrates the window page and directly The background under the window page selects the custom range; d) generates a transparent mask layer in the custom range; and e) captures an image of a multimedia material lower than the transparent mask layer according to the customized range ( Screenshot); f) copying the captured image onto the transparent mask layer to generate a duplicate image; g) replying to the transparency of the window page, and causing the copied image to be displayed above the window page; ) The subsequent use of the copied image on the window page. The method for capturing an instant image of the multimedia material according to claim 1, wherein the custom range is a rectangular range or an irregular range. The method for capturing an instant image of the multimedia material according to the first aspect of the patent application, wherein the multimedia material can be a text, a movie, a picture, a window page, a background, or a combination thereof. An instant image capture method for multimedia data as described in claim 1, wherein the capture function provides a circle selection tool, and the step b is through the computer Peripheral device, manipulate the circle tool to select the custom range. The method for capturing an instant image of a multimedia material as described in claim 4, wherein the computer is operating under a Windows operating system, and the capturing operation in the step d is an application operating through the Windows operating system. Interface (Windows Application Program Interface, Windows API) to carry out. The method for capturing an instant image of the multimedia material according to claim 5, wherein the capturing operation in the step d is performed through the PrintScreen API. The method for capturing an instant image of the multimedia material according to claim 4, wherein the step h is to paste, move, enlarge, reduce, rotate, crop, mark or store the copied image. An application stored in a computer, after the computer is loaded into the application and executed, an instant image capture method for the multimedia data can be executed, and the instant image capture method of the multimedia data includes: a) enabling the a function of the application; b) after the capturing function is turned on, the transmittance of the currently displayed window page is adjusted to zero; c) selecting a custom range under the capturing function, wherein the capturing range is selected The function penetrates the window page and selects the custom range directly from the background under the window page; d) generates a transparent mask layer in the custom range; e) captures the transparent mask according to the custom range An image of a multimedia material having a lower cover layer; f) copying the captured image onto the transparent mask layer to generate a duplicate image; g) reverting the transparency of the window page, and causing the copied image to be displayed on Above the window page; and h) Subsequent use of the duplicate image on the window page.