KR100539791B1 - Method for carrying out close-up function of mobile communication terminal included camera - Google Patents

Abstract

The present invention relates to a mobile communication terminal having a camera, and more particularly to a method of performing a macro communication of a mobile communication terminal having a camera suitable for performing a macro function of a camera without attaching a macro lens to the outside using an edge enhancement algorithm. It is about. The conventional mobile communication terminal having a camera has a macro lens on the outside, and the user needs to adjust the macro lens to perform the macro function, which is complicated mechanically and the user may feel uncomfortable. There was this. In view of the above problems, the present invention provides a method of performing a macro of a mobile communication terminal having a general camera lens, the method comprising: converting an image photographed by macro into a gray level, and converting the image into a gray level; Removing black pixels formed independently of the main image part, removing black pixels located in a part corresponding to a background (margin), and white pixels located in a part corresponding to the main image as black pixels. By the step of switching, it is mechanically simple, there is an effect that can provide convenience to the user.

Description

Method of performing a macro of a mobile communication terminal equipped with a camera {METHOD FOR CARRYING OUT CLOSE-UP FUNCTION OF MOBILE COMMUNICATION TERMINAL INCLUDED CAMERA}

1 is an exemplary diagram of a mobile communication terminal having a conventional external macro lens.

Figure 2 is a flow chart showing an embodiment flow for a macro method of performing a mobile communication terminal having a camera of the present invention.

3A to 3F are exemplary views showing a process to which the present invention is applied.

The present invention relates to a mobile communication terminal having a camera, and more particularly to a method of performing a macro communication of a mobile communication terminal having a camera suitable for performing a macro function of a camera without attaching a macro lens to the outside using an edge enhancement algorithm. It is about.

As the spread of mobile communication terminals represented by mobile phones is widely used, and wireless Internet services using mobile communication terminals are commercially available, consumers' demands related to mobile communication terminal wireless Internet and multimedia functions are also diversified. One of the mobile communication terminals developed to respond to the needs of consumers is a mobile communication terminal (hereinafter referred to as a camera phone) equipped with a digital camera.

A camera phone is a mobile communication that has a function of a wireless communication terminal that performs wireless telephone call and Internet communication, and a digital camera function that can capture a subject and store its image data, and then edit, transmit, and delete it as necessary. It is a terminal.

Briefly describing the process of shooting a video or image using such a camera phone as follows.

From the menu provided in the camera phone to enter the multimedia-related menu, select the digital camera menu provided under the multimedia-related menu.

In the digital camera menu, the user selects a shooting mode for capturing a video or an image, or selects a shooting mode using a preset hotkey on the keypad without entering the menu, and the user wants to shoot a camera provided in the camera phone. Focus on. At this time, the image of the subject to be photographed is displayed on the display window of the camera phone.

When the image or video of the subject is photographed, the captured image or video may be stored in an internal memory under a predetermined name, and the stored image or video may be transferred to an external storage medium through a universal serial bus (USB) cable.

Conventionally, as in the exemplary embodiment shown in FIG. 1 for performing a macro function when photographing a close document using such a camera phone, an external lens is separately mounted and used. That is, it has a selection bar 10 to select the macro lens and the macro lens on the outside, and when the macro image is to be taken, the macro lens is moved by using the selection bar 10 to move the macro lens. Switch to the focus for shooting.

However, the conventional mobile communication terminal having a camera as described above has a macro lens on the outside, which is complicated mechanically because the user needs to adjust the macro lens to perform the macro function, and the user is inconvenient. There was a problem to feel.

Accordingly, the present invention in view of the above problems by applying an edge enhancement algorithm that can perform a macro function with a general-purpose lens without an external macro lens, it is mechanically simple, having a camera that can provide convenience to the user It is an object of the present invention to provide a method for performing a macro of a mobile communication terminal.

According to the present invention for achieving the above object, in the method of performing a macro of a mobile communication terminal having a general camera lens, the image captured by a macro is converted into gray level and then represented as a black and white binary image. Making a step; Removing black pixels formed independently from a main image portion corresponding to a black image among the converted monochrome images; Removing black pixels formed at a portion corresponding to a background (margin); And converting white pixels positioned in a portion corresponding to the main image into black pixels.

With reference to the accompanying drawings, a preferred embodiment of a method for performing macro of a mobile communication terminal having a camera according to the present invention having the above characteristics will be described.

Figure 2 is a flow chart illustrating an embodiment of a method for performing macro close-up of a mobile communication terminal having a camera of the present invention. As shown in the drawing, converting an image macrographed by a general-purpose lens to a black and white level, and removing black pixels that form a group independently from a main portion (black image portion) of the image data converted to the black and white level. And removing the black pixels based on the background part (margin) and converting the white pixels into black pixels based on the main image part.
Here, the image converted to the black and white level is converted to a gray level after macro shooting, and the image converted to the gray level is converted to a black and white image. The algorithm for converting to gray level, the monochrome image converting algorithm, the algorithm for detecting black pixels formed independently from the main image, and the algorithm for detecting black pixels formed in the background are available to those skilled in the art. Detailed description is omitted since it is a known technology.

An operation of the present invention consisting of these steps will be described with reference to FIG.

First, as shown in FIG. 3A, an image made of black and white such as a document or a barcode is photographed in a close state. When a black and white image is photographed in a close-up state, since the macro is taken by a general lens, as shown in FIG. 3B, the image that is not in focus is blurred overall.

The image photographed in the macro state is converted using a gray level adjustment algorithm, and then the color of the entire image is converted into a distinct distribution of black and white using an algorithm for converting the image into a binary black and white image (S10). That is, after the blurred image is converted to image data by using a gray level conversion algorithm, as shown in FIG. 3C, the image is expressed as a single type of white and black as a whole using a monochrome conversion algorithm.

When the photographed image is converted to the black and white level, black pixels are clustered to remove the main image portion represented by black, for example, black pixels forming an independent group in the black text portion as shown in FIG. 3D. (S20). In other words, by comparing each pixel, it is determined that the part shifted to a color different from the surroundings is not a text, and the black pixels located in the biased part are removed.

Next, black pixels are removed based on the background portion (margin). As illustrated in FIG. 3E, black pixels positioned in the white pixel portion that are considered to correspond to the background portion other than the letter are removed (S30). In other words, the white space is converted into a white pixel, which is a blank portion and is displayed as a black pixel such as a text.

Then, the white pixel is converted into a black pixel based on the main image part. As shown in FIG. 3F, the white pixels located in the black pixel part, which is considered to correspond to the letter and not the background part, are converted to the black pixel. A final image is formed (S40). That is, the final image is displayed by converting a portion of the text portion, which is represented by a white pixel such as a margin, into a black pixel.

The image formed by this process is stored in the internal memory of the terminal.

As described above, the present invention can perform a macro function by using only a general lens without providing a macro lens on the outside through an edge enhancement algorithm. Of course, the present invention is not able to completely restore the actual clear letters, but because it is possible to recover enough to determine the letters can be sufficiently identified by the user even in the picture taken close-up.

The present invention is preferably applied when photographing an object made of black and white such as a barcode or a document.

As described in detail above, the present invention has an effect of simplifying mechanically and providing convenience to a user by applying an edge enhancement algorithm capable of performing a macro function with a general-purpose lens without an external macro lens.

Claims (1)

In the macro performing method of a mobile communication terminal having a general camera lens, Converting the image photographed by macro to gray level and expressing it as a black and white binary image; Removing black pixels formed independently from a main image portion corresponding to a black image among the converted monochrome images; Removing black pixels formed at a portion corresponding to a background (margin); And converting the white pixels positioned at the portion corresponding to the main image into black pixels.

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