KR101235591B1 - Mobile terminal and the method with image processing - Google Patents

Abstract

The present invention relates to an image display of a screen. In particular, when a second image is to be displayed while a first image is displayed on a standby screen, the widest position of the background area of the displayed first image is detected. By displaying the second image, the space on the screen can be used efficiently without the user's key manipulation.

Edge detection, background area, foreground area, image processing, terminal

Description

Mobile terminal with image processing function and its method {MOBILE TERMINAL AND THE METHOD WITH IMAGE PROCESSING}

1 is a block diagram showing a mobile terminal having an image processing function according to the present invention.

2 is a flow chart illustrating a method of displaying a second image in accordance with the present invention.

3 is an exemplary diagram illustrating detecting edge information of an arbitrary region of a first image corresponding to a size of a second image according to the present invention;

*** Explanation of symbols for main parts of drawing ***

110: input unit 120: control unit

130: display unit 140: memory unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to image processing, and more particularly, to a mobile terminal and a method having an image processing function for displaying a second image (information) at the widest position of a background area of a first image displayed on a standby screen.

With the development of mobile communication technology, mobile terminals perform various functions. In the past, only the mobile phone functioned as a mobile telephone for transmitting and receiving calls, but recently, as a mobile computer, and even a client function to form a mobile network.

Therefore, since the wireless Internet service can be provided even in a standby state not transmitting or receiving a call, a third generation wireless internet service using a standby screen has recently emerged.

In general, the standby screen service is provided with music, movies, games, texts, chat services or information (news, text, time, weather), etc., in the standby screen, to display the information or the second image on the screen In this case, it is displayed in a fixed position, so that some images of the standby screen are obscured, and the terminal user has the trouble of setting a position for displaying the information or the second image by key operation.

An object of the present invention is to provide a mobile terminal and a method having an image processing function for automatically displaying a second image in the widest position among the background areas of the first image displayed on the standby screen.

The second image may be provided in the form of a video, a still image, a setting menu, and the type of information that may be provided includes at least one of date information, time information, weather information, anniversary information, schedule information, and mail receiving information. Can be.

In order to achieve the above object, a mobile terminal having image processing according to the present invention includes a memory unit for storing a first image and a second image; An input unit for recognizing a key input for selecting the stored first and second images; A controller configured to detect a background area and a foreground area of the first image, and to detect a location where the background area is widest among the detected areas to display the second image on the standby screen; And a display unit for displaying the second image at the detected position.

In order to achieve the above object, a method having an image processing function in a mobile terminal according to the present invention comprises the steps of detecting a background area and a foreground area of the first image; And displaying a second image in a position where the background region is the widest among the detected regions.

The displaying of the second image may include detecting edge information of each pixel in an arbitrary area corresponding to the size of the second image in the first image; edge of each pixel detected in the random area; Summing information; And displaying the edge information summed with respect to the arbitrary area in the area having the smallest value.

Preferably, the predetermined area is an area excluding the edge pixel of the first image, and all pixels of the second image may overlap each other.

Preferably, the second image may be provided in at least one of a video, a still image, and a setting menu. The second image may include date information, time information, weather information, anniversary information, schedule information, and mail reception. It may be at least one of the information.

Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings.

The present invention proposes a mobile terminal and a method having an image processing function for automatically displaying a second image in the widest background area of the first image displayed on the standby screen.

An apparatus having an image processing function according to the present invention is not limited to a mobile terminal, but may be modified and implemented in a TV monitor, an LCD, a computer monitor, a display using a liquid crystal, and the like.

1 is a block diagram showing a mobile terminal having an image processing function according to the present invention.

As shown in FIG. 1, a memory unit 140 storing a first image and a second image; An input unit 110 recognizing a key input for selecting the stored first and second images; A controller (120) for detecting a background area and a foreground area of the first image, and for detecting the largest area among the detected areas to display the second image on the standby screen; It may be configured to include a display unit 130 for displaying the second image at the detected position.

The memory unit 140 may be configured of a program memory and a data memory. The program memory detects a background area and a foreground area of the first image according to the present invention, and determines the size of the second image among the detected background areas. Programs are stored that control the overall operation of detecting any region whose corresponding edge information has the smallest value.

In addition, the data memory stores a plurality of images by various methods, may be configured in a database form, and stores data generated during the overall program execution.

The input unit 110 is a means for inputting numbers and letters when displaying an image stored in the memory unit 140 on the display unit, and includes a keyboard, a keypad, a touch screen, and the like.

An object of the present invention is to display a second image in a position where edge information is small among the background areas of a first image displayed on an idle screen, and this is achieved by using an edge detection algorithm.

Therefore, when the controller 120 is to display the second image, which is more than one image, on the screen while the first image is displayed on the standby screen, the foreground area and the background area of the first image are displayed. Is detected, and the second image is displayed on an arbitrary region having the smallest edge information among the detected regions.

In addition, the controller 120 adds edge information of each pixel to an arbitrary area corresponding to the size of the second image in the first image to detect a position where the edge information of the background area is the smallest. And displaying the second image in a region having a minimum value among edge information of each sum region.

The detection algorithm of the edge information will be described later. In this case, the second image should be smaller than the size of the first image, for this reason, an arbitrary region having the smallest edge information among the background regions of the first image is included. This is because the edge information of each pixel of the first image is used for detection.

The display unit 130 displays a result performed by the controller 120, a text, a key value, and an image (image) image input through the input unit.

Accordingly, the display unit 130 may display the second image transparently or semitransparently in a region where edge information is small among the background regions of the first image, and the second image may be reduced or reduced so as not to cover the foreground region. It can be enlarged and displayed.

In addition, although not shown in the drawings, the mobile terminal according to the present invention includes a transceiver for transmitting and receiving image data through an antenna; The audio processing unit may further include an audio processor configured to reproduce the received audio signal output from the transceiver and output the same to a speaker, or transmit a transmission audio signal generated from a microphone to the transceiver.

Image data received from the transceiver unit may be stored in the memory unit 140.

The image processing method in the mobile terminal according to the present invention with the configuration as described above is as follows.

2 is a flowchart illustrating a method of displaying a second image according to the present invention.

As shown in FIG. 2, when the first image is to be displayed on the standby screen, and the second image is to be displayed, each pixel in an arbitrary area corresponding to the size of the second image in the first image is displayed. Detecting edge information (S210), summing edge information of each pixel detected in the arbitrary area (S220), and displaying the edge information, which is added with respect to the arbitrary area, in the area having the smallest value; It is configured to include (S230).

The arbitrary area corresponds to an area excluding edge pixels of the first image, and all the sizes of the second image should be included.

The second image may be provided in at least one of a video, a still image, and a setting menu. The second image may include at least one of date information, time information, weather information, anniversary information, schedule information, and mail reception information. It can be one.

In addition, the second image may be displayed by being reduced or enlarged in order to be displayed by the set transparency or to cover the foreground area.

In order to help understand the exemplary embodiment of the present invention, the basic contents related to image processing and a method of detecting edge values will be described below.

In general, an image refers to a photograph, text, video, graphic, animation, multimedia content, and the like, and is represented by a continuous function defined on a two-dimensional plane by changing brightness values of the images.

If it further includes a function for the time axis on the two-dimensional plane, several hundred or tens of thousands of images per second will be represented as a moving video image.

The image processing reads a brightness value at a predetermined interval and expresses the value in a limited bit. In this case, the numerical value of the predetermined interval is called sampling, and the representation of the sampled brightness value in a limited bit is called quantization. do.

In addition, the said fixed interval is called a pixel (pixel) commonly called.

For example, in the case of a binary image, only two types of brightness levels are expressed in one bit, but in the case of a color image, three primary colors of light (red, green, and blue) are represented. By using)), the ratio of RGB contained in each pixel is expressed by 8/8/8 bits, respectively. Therefore, since the number of cases that can be represented by 8 bits is from 0 to 255, the range of colors that can be represented will be 256/256/256.

In addition, each pixel is expressed in the form of a two-dimensional matrix, and as shown in FIG. 3, assuming that the size of the first image is (1_image_width, 1_image_height) and expressed in a two-dimensional matrix, from (0,0) to (1_image_width, 1_image_height) Will be expressed as

An edge corresponds to a boundary of an image, and refers to a place where the difference between neighboring pixels is sharp, and averaging the difference between the RGB value of the reference pixel and the RGB value of the peripheral pixel. Calculate the edge information.

According to these characteristics, the edge detection algorithm is formulated as follows.

edge [x] [y] = ((edge_r [x] [y] + edge_g [x] [y] + edge_b [x] [y]) / 3)

edge_r [x] [y] = | 1_image_r [x] [y]-1_image_r [x-1] [y-1] |

edge_g [x] [y] = | 1_image_g [x] [y]-1_image_g [x-1] [y-1] |

edge_b [x] [y] = | 1_image_b [x] [y]-1_image_b [x-1] [y-1] |

Referring to the edge detection algorithm, an embodiment according to the present invention will be described in terms of a user interface.

Referring to FIG. 3, when the terminal user selects the first image 310 using the keypad or the keyboard and sets the standby screen in the standby screen setting mode, the terminal sets the first image in the standby state of the mobile terminal. 310 is set as the standby screen and displayed on the display unit.

When the second image (clock) 320 is selected while the first image 310 is displayed on the standby screen, the mobile terminal displays the selected second image (clock) 320 in the first image 310. Overlap in any area of.

In this case, the two images may be at least one of date information, time information, weather information, anniversary information, schedule information, and mail receiving information, and the user may set transparency.

When the arbitrary region assumes the size of the first image (1_image_width, 1_image_height) and the size of the second image is (2_image_width, 2_image_height), the second image 320 is included in the first image region, Two conditions that must overlap within an area where peripheral pixel information of the first image can be obtained must be satisfied.

Therefore, the second image 320 should not exceed the size of the first image in order to be included in the first image area, and the edge portion of the first image is an area where peripheral pixel information can be obtained. Pixel information corresponding to should not be included.

Accordingly, the second image 320 is included in the (1_image_width-2_image_width-1, 1_image_height-2_image_height-1) points from the (1,1) point of the first image, not (0.0) of the first image. By being located in an arbitrary region, the region overlapping with the first image is created.

The edge information of each pixel of the first image corresponding to the overlapped area a is added together.

In this case, edge information of each pixel of the first image is calculated by an edge detection algorithm, and the second image is overlapped with another arbitrary area of the first image several times, thereby adding up the summed edges in the overlapped areas. Displayed as transparent or opaque according to the transparency set in the area with the smallest value among the information values.

In addition, the second image 330 may be reduced or enlarged to be displayed in the background area 310_a.

Thus, as shown in FIG. 3, the arbitrary region is a region that does not overlap the foreground region 310_b among the background region 310_a of the first image.

In addition, although the present invention has been described with reference to the embodiments illustrated in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible therefrom. will be.

Accordingly, the true scope of the present invention should be determined by the technical idea of the appended claims.

According to the present invention, the second image is automatically displayed on the background area of the first image displayed on the standby screen, thereby displaying the second image without key manipulation of the terminal user.

Claims (8)

In superimposing and displaying a second image on a first image, Detecting a background area and a foreground area of the first image; Detecting edge information of each pixel in an area corresponding to the size of the second image in the detected background area; Summing edge information of each pixel detected in the arbitrary area; And And displaying the second image in a region having the smallest edge information summed with respect to the arbitrary region. delete The method of claim 1, wherein the second image is An image representing at least one of date information, time information, weather information, anniversary information, schedule information, and mail receiving information. The method of claim 1, wherein the second image is An image processing method of a mobile terminal, characterized in that the image can be set transparency. The method of claim 1, wherein the second image is An image processing method of a mobile terminal, which may be provided in at least one of a video, a still image, and a setting menu. A memory unit for storing the first image and the second image; Detecting a background area and a foreground area in the first image, summing edge information of each pixel included in an arbitrary area among the detected background areas, and adding the edge information to an arbitrary area having the smallest value. A control unit which controls to display the second image; And Under the control of the controller, a mobile terminal having an image processing function, characterized in that the display unit for superimposing and displaying the first image and the second image. delete The method of claim 6, wherein the control unit The mobile terminal with an image processing function, characterized in that for displaying the second image in a transparent or translucent.

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