KR100562142B1 - wireless telecommunication terminal and Method for taking a picture - Google Patents

Abstract

1. TECHNICAL FIELD OF THE INVENTION

The present invention relates to a wireless communication terminal having an image capturing function and a method thereof.

2. The technical problem to be solved by the invention

An object of the present invention is to provide a wireless communication terminal having an image capturing function and a method thereof for capturing an image currently displayed by storing an image stored in a display memory when capturing an image.

3. Summary of Solution to Invention

The present invention provides a wireless communication terminal having an image capturing function, comprising: image acquiring means for acquiring image data; Image processing means for constructing an image frame using the image data obtained by the image obtaining means, and encoding the image frame stored in the first storage means under control of the control means; The first storage means for storing the image frame constructed by the image processing means; Display means for displaying an image frame stored in the first storage means; Second storage means for storing an image frame (photographed image) encoded by the image processing means under the control of the control means; Controlling the image processing means to encode an image frame stored in the first storage means as a photographing signal is input, and controlling the second storage means to store the image frame encoded by the image processing means. Control means.

4. Important uses of the invention

The present invention is used in a wireless communication terminal.

Image recording, image frame, image data, display memory, wireless communication terminal

Description

Wireless communication terminal having an image capturing function and a method thereof {wireless telecommunication terminal and Method for taking a picture}             

1 is a configuration of an embodiment of a wireless communication terminal having a conventional image capturing function.

2 is a block diagram of an embodiment of a wireless communication terminal having an image capturing function according to the present invention;

3 is a flowchart illustrating an image capturing method in a wireless communication terminal according to the present invention;

* Explanation of symbols for the main parts of the drawings

21: image acquisition unit 22: image processing unit

23: display memory 24: display unit

25 storage unit 26 control unit

The present invention relates to a wireless communication terminal having an image capturing function and a method thereof, and more particularly, to capture an image currently displayed by storing an image stored in a display memory during image capturing. A wireless communication terminal and a method thereof are provided.

In the present invention, the wireless communication terminal is a mobile communication terminal, a personal communication service (PCS) terminal, a personal digital assistant (PDA), a smart phone, a next generation mobile communication (IMT-2000) terminal, a wireless LAN terminal and the like through wireless communication Refers to a portable wireless communication terminal capable of transmitting and receiving text and image data.

Advantages of the wireless communication terminal may be various, but above all, it is said that the greatest advantage is in the mobility provided to the user who is calling. Due to this mobility, the number of wireless communication subscribers has increased exponentially, and in recent years, wireless communication terminals are widely used by the general public.

As the number of users of wireless communication terminals increases, users of wireless communication terminals hope that the wireless communication terminals provide more additional functions. In response to these demands, a wireless communication terminal (eg, a camera phone) equipped with a camera has recently been released, and has become an explosive popularity among users. In particular, wireless communication terminals equipped with ultra-compact digital cameras have enjoyed a lot of popularity due to the convenience of taking pictures and sending them immediately to the desired party. Since the image quality is approaching the level of general digital cameras due to the development of camera technology, In the future, digital cameras, along with a display unit (for example, liquid crystal display), are expected to become an essential item for wireless communication terminals.

The wireless communication terminal having such a camera includes a user information input unit for receiving user information, a camera module connected to a circuit board (PCB), and a display unit (LCD) for displaying a program and an image for executing the same in a visible state. When the user enters the camera mode (image capturing mode) from the menu of the wireless communication terminal equipped with the camera to activate the camera function, the image input through the camera is displayed on the display unit (LCD). While watching the display (LCD) of the wireless communication terminal to take a desired image directly. At this time, the captured image is stored in a storage unit (memory).

As such, when the image is captured by using the wireless communication terminal having the camera, the image to be photographed is displayed on the display unit LCD. That is, when the camera function is activated, the wireless communication terminal including the camera displays an image input through the lens on the display unit LCD. At this time, when the photographing signal is input, the N + 1th image frame is taken when the image to be displayed after the currently displayed image, that is, the currently displayed image, is the Nth image frame, not the image currently being displayed. .

Here, referring to FIG. 1, a method of capturing an image in a conventional wireless communication terminal is as follows.

First, image (image) data is acquired through the image acquisition unit 11.

Thereafter, the image processing unit 12 configures an image frame suitable for the resolution of the display unit (for example, an LCD (Liquid Crystal Display)) 14 using the image data acquired by the image acquisition unit 11, and then displays the image frame. It stores in the memory 13.

Then, the display unit 14 displays the image frame stored in the display memory 13 in real time. This process is commonly referred to as preview.

Since all wireless communication terminals that have a camera function have a preview function, the user can watch an image to be captured through a display window and adjust the composition, resolution, and size of the image if there is an image to be captured. Then, input the shooting signal to shoot the desired video.

At this time, when a photographing signal is input from the user through an input unit (not shown), the wireless communication terminal displays an image currently displayed on the display unit 14, that is, an image stored in the display memory 13. Instead of taking a picture, the picture to be displayed is taken after the currently displayed image. The reason for this is that the resolution of the image stored in the display memory 13 depends on the resolution of the display unit 14 because the resolution of the display unit 14 was low in the past.

In more detail, the image processor 12 configures an image frame to be displayed through the display unit 14 using the image data acquired by the image acquirer 11. The image frame thus configured is stored in the display memory 13 and displayed on the display unit 14 in real time.

Therefore, the image frame displayed on the display unit 14, that is, the image frame stored in the display memory 13 and the image frame constituted by the image processing unit 12, cause some time delay. There was a problem that the difference between the image to be taken and the actual image to be taken.

In addition, since the image processor 12 is greatly influenced by the amount of light (amount of light) when constructing an image frame, the image processor 12 quickly uses the image data acquired by the image acquisition unit 11 at a place where the amount of light (brightness) is sufficient. You can configure video frames (usually 15 to 30 frames per second), but only 2 to 8 frames per second in places where there is not enough light.

Therefore, when the image is taken in a place where the amount of light is not enough, the difference between the image to be taken and the actual image to be taken by the user is severely generated, which further increases the problem of failing to take a desired image.

The present invention has been proposed to solve the above problems, and provides a wireless communication terminal and a method having an image capturing function for capturing an image currently displayed by storing an image stored in a display memory when capturing an image. The purpose is.

According to an aspect of the present invention, there is provided a wireless communication terminal having an image capturing function, comprising: image obtaining means for obtaining image data; Image processing means for constructing an image frame using the image data obtained by the image obtaining means, and encoding the image frame stored in the first storage means under control of the control means; The first storage means for storing the image frame constructed by the image processing means; Display means for displaying an image frame stored in the first storage means; Second storage means for storing an image frame (photographed image) encoded by the image processing means under the control of the control means; And controlling the image processing means to encode an image frame stored in the first storage means as a photographing signal is input, and controlling the second storage means to store the image frame encoded by the image processing means. It characterized in that it comprises the control means.

On the other hand, the method of the present invention, the image capture method in a wireless communication terminal, the image data acquisition step of acquiring the image data; An image frame composition step of constructing an image frame using the obtained image data; A first image frame storing step of storing the configured image frame in a first storage means; An image frame encoding step of encoding an image frame stored in the first storage means as a photographing signal is input; And a second image frame storing step of storing the encoded image frame in a second storage means.

The above objects, features and advantages will become more apparent from the following detailed description taken in conjunction with the accompanying drawings. Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a configuration diagram of an embodiment of a wireless communication terminal having an image capturing function according to the present invention.

As shown in FIG. 2, the wireless communication terminal having an image capturing function according to the present invention uses an image acquisition unit 21 for acquiring image data and an image data acquired by the image acquisition unit 21. The image frame is configured according to the resolution of the display unit 24 and stored in the display memory 23, and under the control of the controller 25, the image frame stored in the display memory 23 is received and encoded (for example, An image processor 22 for encoding a JPEG (Joint Photographic coding Experts Group), a display memory 23 for storing an image frame configured by the image processor 22, and an image frame stored in the display memory 23. Storage for storing the image frame (photographed image) encoded by the image processor 22 under the control of the display unit 24 and the control unit 26 for displaying the 25, the image processing unit 22 controls the image processor 22 to encode an image frame stored in the display memory 23 as a photographing signal is input, and stores the image frame encoded by the image processor 22. A control unit 26 for controlling the unit 25 is included.

Here, the control unit 25 transmits the image frame stored in the display memory 23 to the image processing unit 12 and receives the image frame encoded by the image processing unit 12 to receive the storage unit 25. Store in

In addition, the image processor 22 includes a camera backend chip that functions to transmit an image to a liquid crystal display by a type of digital signal processor (DSP) that processes an image received by a sensor through a lens. do.

3 is a flowchart illustrating an image capturing method in a wireless communication terminal according to the present invention.

First, a user activates a camera function through a menu of a wireless communication terminal. Then point the lens at the subject you want to shoot. Then, the wireless communication terminal acquires image data of the subject through the image acquisition unit 21 (301).

Thereafter, the image processor 22 configures an image frame according to the resolution of the display unit 24 by using the image data acquired by the image acquisition unit 21 (302), and then displays it on the display unit 24. The display memory 23 stores the display memory 23 in the display memory 23. Then, the display unit 24 displays the image frame stored in the display memory 23 in real time (304).

At this time, if the amount of light (brightness of light) is sufficient, 15 to 30 frames per second are configured and stored in the display memory 23. If the amount of light is not sufficient, the display memory 23 is configured by 2 to 8 frames per second. Store in Therefore, when the amount of light is not sufficient, the image is often disconnected because many image frames cannot be displayed through the display unit 24.

Thereafter, if the photographing signal is input (305), if the photographing signal is not input, the process proceeds to the “301” process, and if the photographing signal is input, the display unit 24 displays the photographing signal. An image, that is, an image frame (photographed image) stored in the display memory 23 is encoded (306) and stored in the storage unit 25 (307).

The present invention described above is not limited to the above-described embodiments and the accompanying drawings, and various substitutions, modifications, and changes are possible in the art without departing from the technical spirit of the present invention. It will be clear to those of ordinary knowledge.

As described above, the present invention has an effect of capturing an image to be photographed by a user by capturing an image currently being displayed through a display unit.

Claims (2)

In a wireless communication terminal having an image capturing function, Image acquisition means for acquiring image data; Image processing means for constructing an image frame using the image data obtained by the image obtaining means, and encoding the image frame stored in the first storage means under control of the control means; The first storage means for storing the image frame constructed by the image processing means; Display means for displaying an image frame stored in the first storage means; Second storage means for storing an image frame (photographed image) encoded by the image processing means under the control of the control means; And Controlling the image processing means to encode an image frame stored in the first storage means as a photographing signal is input, and controlling the second storage means to store the image frame encoded by the image processing means. Control means Wireless communication terminal having a video shooting function comprising a. In the image capturing method in a wireless communication terminal, Image data obtaining step of acquiring image data; An image frame composition step of constructing an image frame using the obtained image data; A first image frame storing step of storing the configured image frame in a first storage means; An image frame encoding step of encoding an image frame stored in the first storage means as a photographing signal is input; And A second image frame storing step of storing the encoded image frame in a second storage means; Image capturing method in a wireless communication terminal comprising a.

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