KR100465962B1 - Method for processing emboss filter of picture in wireless terminal - Google Patents

Abstract

A method of embossing and displaying a photographic image of a mobile terminal includes setting a size of a window mask, moving the mask, and applying an emboss filter value to at least two pixels set in the set mask. Performing a multiplication operation, calculating a difference between values of the multiplied pixels, setting and storing the difference as a center pixel value in the set mask, and checking whether the mask position is the last position of the photographic image, or otherwise moving the mask. And a process of displaying the stored emboss screen when the mask position is the last position of the photo image.

Description

Method of processing embossing of video screen in mobile terminal {METHOD FOR PROCESSING EMBOSS FILTER OF PICTURE IN WIRELESS TERMINAL}

The present invention relates to a method for processing a video screen, and more particularly, to a method for embossing a video screen.

Currently, portable mobile communication terminals are converting to a structure capable of transmitting high speed data in addition to voice communication functions. Data that can be processed by the mobile terminal performing the data communication may be packet data and image data.

Currently, the mobile terminal has a function of transmitting and receiving image data. Therefore, the video screen received from the base station is stored or the acquired video screen is transmitted to the base station. In addition, the portable terminal may include a camera for photographing an image screen and a display unit for displaying an image signal photographed by the camera. The camera may use a CCD or a CMOS sensor, and the display unit may use an LCD. In addition, with the miniaturization of the camera device, the device for capturing the image is becoming more and more miniaturized. The portable terminal may capture a video screen and display the moving picture and the still picture, and transmit the captured video screen to the base station.

As described above, as the needs of operators and consumers are increased with respect to video mails, the above-mentioned services are implemented, and the trend is to be greatly increased in the future. In addition, the functions of editing a video screen by a user's operation in the portable terminal are also increasing. For example, technologies for adjusting (zoom in, zoom out) or synthesizing a plurality of photographic images stored in a portable terminal are implemented.

Accordingly, an object of the present invention is to provide a method for embossing a photographic image in a mobile terminal.

Another object of the present invention is to provide a method capable of performing an embossing function of correcting the outline of a selected photo image after selecting the photo image being stored in the mobile terminal.

According to another aspect of the present invention, there is provided a method of embossing and displaying a photographic image of a mobile terminal, the method comprising: setting a size of a window mask, moving the mask, and setting the window mask within the set mask. Multiplying an embossed filter value with each of at least two pixels set, calculating a difference between values of the multiplyed pixels, setting the central pixel value in the set mask, and storing the difference; Checking whether the last position of the photographic image, or proceeding to the mask moving process, and if the mask position is the last position of the photographic image characterized in that the process of displaying the stored emboss screen.

1 is a diagram illustrating a configuration of a portable terminal for implementing an embossing effect of a video screen according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating a configuration of an image processing unit in FIG. 1.

3 is a diagram illustrating a procedure for implementing an embossing effect of a video screen according to an embodiment of the present invention.

4A-4C illustrate the structure of a mask and an emboss filter for performing an embossing effect in accordance with an embodiment of the invention.

5A and 5B illustrate an original image screen and an image screen embossed according to an embodiment of the present invention.

6 is a diagram illustrating a procedure for implementing an embossing effect in a mobile terminal according to an embodiment of the present invention.

DETAILED DESCRIPTION A detailed description of preferred embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that the same components in the figures represent the same numerals wherever possible.

In the following description, specific details such as mask size, embossing filter, size of photographic image, etc. for implementing the embossing effect are shown to provide a more general understanding of the present invention. It will be apparent to one of ordinary skill in the art that the present invention may be readily practiced without these specific details and also by their modifications.

1 is a diagram showing the configuration of a mobile terminal according to an embodiment of the present invention, which may be a configuration of a mobile telephone.

Referring to FIG. 1, the RF unit 23 performs a wireless communication function of the portable telephone. The RF unit 23 includes an RF transmitter for upconverting and amplifying a frequency of a transmitted signal, and an RF receiver for low noise amplifying and downconverting a received signal. The data processor 20 includes a transmitter for encoding and modulating the transmitted signal, a receiver for demodulating and decoding the received signal, and the like. That is, the data processor 20 may be configured of a modem and a codec CODDEC. The codec includes a data codec for processing data and an audio codec for processing an audio signal such as voice. The audio processor 25 plays a function of reproducing a received audio signal output from the audio codec of the data processor 20 or transmitting a transmission audio signal generated from a microphone to the audio codec of the data processor 20.

The key input unit 27 includes keys for inputting numeric and character information and function keys for setting various functions. In addition, the key input unit 27 may be provided with function keys for implementing the embossing effect according to an embodiment of the present invention. The memory 30 may include a program memory, a data memory, and image memories for storing photographic images according to an exemplary embodiment of the present invention. The program memory may store programs for controlling a general operation of the portable telephone and programs for processing an image signal applied to a display unit according to an exemplary embodiment of the present invention. In addition, the data memory temporarily stores data generated during the execution of the programs. The image memory is a memory for storing photographic image data or embossed photographic image data.

The controller 10 performs a function of controlling the overall operation of the portable terminal. In addition, the controller 10 may include the data processor 20. In addition, the controller 10 controls operations of processing the embossing function according to a mode command set from the key input unit 27 according to an embodiment of the present invention.

The camera module 40 includes a camera sensor for capturing image data, converting the photographed optical signal into an electrical signal, and a signal processor for converting the analog image signal photographed from the camera sensor into digital data. Herein, it is assumed that the camera sensor is a CCD sensor, and the signal processor may be implemented by a digital signal processor (DSP). In addition, the camera sensor and the signal processor may be integrally implemented or may be separately implemented.

The image processor 50 performs a function of generating screen data for displaying an image signal output from the camera unit 40. The image processor 50 processes the image signal output from the camera unit 40 in units of frames, and outputs the frame image data according to the characteristics and size of the display unit 60. In addition, the image processor 50 includes an image codec and performs a function of compressing the frame image data displayed on the display unit 60 in a set manner or restoring the compressed frame image data to the original frame image data.

The display unit 60 displays a frame image signal output from the image processor 50 on a screen, and displays user data output from the controller 10. In addition, the display unit 60 displays a video signal reproduced under the control of the controller 10. The display unit 60 may use an LCD. In this case, the display unit 60 may include an LCD controller, a memory capable of storing image data, and an LCD display device. In this case, when the LCD is implemented using a touch screen method, the LCD may operate as an input unit.

The communication interface 70 is connected to an external communication device and performs a function of communicating a picture image with a portable terminal. Wherein the external communication device is a scanner, a computer. Digital cameras and the like. The communication interface 70 may perform a communication interface function with the external communication devices under the control of the controller 10 to output a stored picture image or to receive a picture image.

Referring to FIG. 1, the mobile phone according to an embodiment of the present invention may perform an operation of displaying or transmitting a person or a surrounding environment on a video screen. First, the camera unit 40 may be mounted on a portable telephone or connected to a predetermined position outside. That is, the camera unit 40 may be an external camera or an internal camera. The camera unit 40 may use a charge coupled device (CCD) sensor. The image captured by the camera unit 40 is converted into an electrical signal by an internal CCD sensor, and then the signal processor converts the image signal into digital image data. The converted digital image signal and the synchronization signal are output to the image processor 50. The synchronization signal may be a horizontal synchronization signal (Hsync) and a vertical synchronization signal (Vsync).

2 is a diagram illustrating an example of a configuration of the image processor 50 according to an embodiment of the present invention.

Referring to FIG. 2, the camera interface 211 interfaces the image data and the synchronization signals HREF and VREF from the camera unit 40. The HREF is a horizontal validity period flag, which is used as a line synchronization signal. The HREF may be a horizontal synchronous signal for reading image data stored in a line memory in the camera unit 40 on a line basis. The VREF is used as a frame synchronization signal as a vertical validity period flag. The VERF is used as a signal that can be transmitted by the signal processor 60 which processes image data photographed by the camera unit 40. The VREF is generated in units of one frame and may be a vertical synchronization signal.

The LCD interface 217 may access the image data of the controller 10 and the display screen generator by switching the selector 219.

The scaler 213 performs a function of scaling the magnitude of the image signal photographed by the camera unit 40 to the magnitude of the image signal that can be displayed on the display unit 60. That is, the number of pixels of the video signal of one frame photographed by the camera unit 40 and the number of pixels of the one frame video signal that can be displayed on the display unit 60 are different. The scaler 213 reduces (decimates) the number of pixels of one frame photographed by the camera unit 40 to the number of pixels of one frame that can be displayed on the display unit 60 or sets an appropriate number of pixels of the photographed one frame. To display on the display unit.

The image codec 231 compresses the captured image signal or restores the compressed image signal to the original image signal. In an embodiment of the present invention, the image codec 231 is assumed to be a JPEG codec. The image codec 80 performs JPEG compression on the image data output from the camera unit 40 and outputs the encoded data to the control unit 10 or restores the compressed coded data input from the control unit 10 to the scaler 213. Perform.

The small screen processing unit 221 reconstructs the image data output from the image processing unit to the set small screen. The small screen processing unit 221 cuts the left and right ends and the top and bottom ends of the video screen displayed on the display unit 60 to a predetermined size, and then decimates the pixels of the cut video screen to generate a small screen.

The control interface 221 performs an interface function between the image processor 50 and the controller 10, and also performs an interface function between the display unit 60 and the controller 10. That is, the control interface 221 performs an interface function between the controller 10 and the image processor 50. The control interface 221 is a common interface for accessing the image processor 50 and the display unit 60 through the image processor 50.

The selector 219 selects data output from the image processor 50 or data output from the controller 10 according to the control signal output from the controller 10 and outputs the data to the display unit 60. Here, the first control signal refers to a signal for activating a bus between the image processor 50 and the display 60, and the second control signal is a signal to activate a path between the controller 10 and the display 60. In addition, the controller 10 may perform the bidirectional communication between the display unit 60 through the selector 219.

Accordingly, the portable terminal having the configuration as shown in FIGS. 1 and 2 may receive a video screen obtained from the camera 40, the RF unit 23, the communication interface unit 70, and the like and store the picture image in the memory 30 as a picture image. They may be stored as a small screen through the small screen processor 241 of the image processor 50. Therefore, a picture image and a corresponding small screen image may be stored in the image memory area of the memory 30.

In the above state, the user may check and edit the photo image stored in the memory 30. At this time, the control unit 10 accesses the small screen images stored in the memory 30 and displays them on the display unit 60 in the screen display mode, and the user checks the small screen images displayed on the display unit 60 and selects a desired image to edit the embossing. Can be performed.

In general, a sharp change in brightness in a photographic image is called an edge. The embossing effect is a function similar to edge detection, and refers to a technique for producing an effect in which one side is convex protruding and the other side is concave, based on the sharp part of the edge change. That is, the embossing effect refers to the effect of embossing the surface of the photographic image. For this purpose, an embossing filter is used, and the embossing filter may use a structure as shown in FIGS. 4A to 4C. In other words, the window mask multiplies the value of the pixels positioned at the diagonal of the center pixel by a specific value and fills the remaining pixels with 0, calculates the value of the diagonal pixel, and converts the value to the center pixel. It is assumed that the emboss filter used in the embodiment of the present invention uses the structure shown in FIG. 4C, and the size of the window mask uses 3 * 3 pixels.

3 is a diagram illustrating an embossing processing flow according to an embodiment of the present invention.

Referring to FIG. 3, when the user first selects a photo image and then presses an embossing function key through the key input unit 27, the controller 10 detects it in step 311 and implements the embossing effect of the selected photo image in step 313. A window mask size is determined and the variables x and y for moving the window mask in the photographic image are initialized. In this case, it is assumed that the window mask size is 3 * 3 pixels as described above. In addition, the x variable refers to the horizontal pixel position of the picture image, the y variable refers to the vertical line of the picture image. At this time, the first and last pixels of each line and the pixels of the first and last lines of the picture image cannot set a window mask. In an embodiment of the present invention, the first pixels of each line of the photographic image are set to the values of the second pixels, the last pixels are set to the values of the pixels before the last pixel of the corresponding line, and the pixels of the first line are second It is assumed that the pixel values of the line and the pixels of the last line are set to the values of the pixels before the last line. Thus, the position of x = 0 can be the second pixels of each line, the x = last position can be the second to last pixels of each line, and the position of y = 0 can be the pixels of the second line. And y = last position can be the second line from the last.

The controller 10 sets the window mask at the position x = 0 in steps 315 and 317, and then calculates a difference between the pixels in the window mask set in step 319. At this time, in step 319, the difference between the pixels in the mask is calculated, and it is assumed that the emboss filter uses the structure of FIG. 4C. Accordingly, the controller 10 multiplies the RGB values of pixel data where the mask value is not 0 in the window mask by the mask value and the mask value in step 319, and adds R values to the calculated RGB values. Calculate, add G values together, and add B values together. In step 321, the controller 10 checks whether the calculated RGB values exceed a threshold. In this case, when the calculated RGB value exceeds the limit value, the center pixel value is processed to the maximum value in step 323. In addition, if the calculated RGB values have a negative value in step 325, the controller 10 processes the value of the center pixel to 0 in step 327. In operation 325, the controller 10 stores the RGB value of the calculated result in operation 329.

After performing steps 321 to 329 to calculate the values of the pixels in the window mask according to the set emboss filter value, the controller 10 stores the processed values as the center pixel values of the window mask in step 331. After the operation in the mask is finished as described above, the controller 10 checks whether the x value is the last pixel of the corresponding line in step 333, or returns to step 317 after increasing the value of x by 1. Repeat this. Therefore, if the above operation is repeated, the emboss filter operation on the pixels of one line is performed.

When the emboss filter operation is performed on the pixels of one line by the above operation, the controller 10 detects this in step 333 and checks whether the last line is performed in step 337. If this is not the last line, the controller 10 detects this in step 337, increases y by one in step 339, and returns to step 315 to repeat the above operation. After completing the emboss filter operation to the last line, the control unit 10 detects this in step 337 and reads the embossed filter image data in step 341 and displays it on the display unit 60.

3, the photo image of FIG. 5A is processed and displayed as shown in FIG. 5B. When the emboss filter is applied to the photographic image as shown in FIG. 5A, the photographic image is processed to be convex and displayed as shown in FIG. 5B.

FIG. 6 is a diagram illustrating an example in which the embossing function as shown in FIG. 3 is applied to a portable terminal.

Referring to FIG. 6, a user first selects a menu and then selects a photo album for displaying stored photos from the selected menu. Then, the controller 10 detects this while performing steps 411 and 413. If the user selects a photo decorator, the control unit 10 detects it in step 415 and displays a photo decorating menu including an emboss filter. In this case, when the user selects the embossing function, the control unit 10 detects this in step 417 and displays the small screens of the photo images stored in the memory 30 on the display unit 60. In this case, a plurality of small screen images displayed on the display unit 60 may be displayed. Here, it is assumed that six small screens are displayed in two columns of three. Then, the user can select a small screen of a desired picture image using the navigation key of the key input unit 27. When a selection signal of a specific small screen is input, the control unit 10 detects it in step 419 and corresponds to the small screen selected in step 421. The photographed image is accessed and displayed on the display unit 60. When the execution key (assuming a confirmation key in this case) is pressed in the above state, the control unit 423 detects this in step 423 and performs emboss filtering on the selected photographic image while performing steps 425 to 435.

Referring to the operation of the embossing filtering process, the control unit 10 sets the mask as shown in FIG. The data is multiplied by a value of "-1", and the second pixel data in the diagonal direction is multiplied by "+1". In this case, the pixel data may be RGB data. Thereafter, the R value of the first pixel data and the R value of the second pixel data, the G value of the first pixel data and the G value of the second pixel data, the B value of the first pixel data and the B of the second pixel data Each value is added to calculate RGB difference values of the first and second pixel data. In step 431, the controller 10 checks whether the calculated RGB value exceeds a threshold value, and in step 433, applies the RGB values according to the checked result to pixel data (center pixel data in the mask) to be embossed. . At this time, if the calculated RGB value exceeds the threshold value, the center pixel value is processed to the maximum value. If the calculated RGB values have a-value, the center pixel value is treated as 0. If neither condition is satisfied, the RGB value of the result is stored as the RGB value of the center pixel.

After performing the operation in one mask as described above, the process returns to step 425 to set the next mask and repeats the above operation. The embossed filtered value of the center pixel is processed in units of masks by repeatedly performing the above operation. When the embossing process is completed for all pixels of the photographic image, the controller 10 detects this in step 435 and displays the photographic image as shown in FIG. 5B according to the result processed in step 437.

When the key for selecting a photo is selected again in the state of displaying the embossed photo image, the embossed image of the continuously selected photo may be displayed by performing the above procedure after displaying the selected photo. In addition, if the cancel key is pressed while displaying the embossed photo image, the display returns to the state of the previous menu.

As described above, the user may display the selected photographic image as an embossed photographic image in the portable terminal storing the photographic image, thereby re-editing the photographic image into various image screens. In addition, the embossed photo image can be displayed as described above, and can be stored in an external device through a communication interface or transmitted to a base station and transmitted to other subscribers, thereby improving the display function of the terminal.

Claims (6)

In the method of embossing and displaying the photo image of the mobile terminal, Setting the size of the window mask, Moving the mask; Multiplying an emboss filter value with each of at least two pixels set in the set mask; Calculating a difference between values of the multiply computed pixels, setting the central pixel value in the set mask, and storing the difference; Checking whether the mask position is the last position of the photographic image, or proceeding to the mask movement process; And if the mask position is the last position of the photographic image, displaying the stored embossed screen. The method of claim 1, wherein the step of calculating the emboss filter value, Multiplying the mask values by the R, G, and B values of pixels whose mask value is not 0; And adding R, G and B values from the calculated R, G and B values, respectively. The method of claim 2, wherein the setting of the center pixel value comprises: If the calculated R, G, B value is out of the range of the threshold value process to the maximum value, If the calculated R, G, B values have a-value, the process of processing to 0, If the calculated R, G, B values are within the limit value and do not have a-value, the process of processing as a calculated value, And storing the processed R, G, and B values as values of a center pixel. The method of claim 1, wherein the window has a size of 3 * 3 and the emboss filter has a configuration as shown in Table 1 below. -One 0 0 0 0 0 0 0 One The method of claim 1, wherein the window has a size of 3 * 3, and the emboss filter has a configuration as shown in Table 2 below. -One 0 0 0 0 0 0 0 -One The method of claim 1, wherein the window has a size of 3 * 3, and the emboss filter has a configuration as shown in Table 3 below. 0 0 One 0 0 0 -One 0 0