KR20000051774A - Method for adjusting the size of image in DSC - Google Patents

Abstract

PURPOSE: A method for controlling an image size of a digital still camera is provided to differently input and process a horizontal size of a photographing data for the object, and convert the processed to a normal format to be output more slendly or plumply than the photographed object. CONSTITUTION: A vertical size is fixed and a horizontal size is changed in a normal format of a photographing data inputted through a CCD(Charge Coupled Device)(4), thereby storing a photographing data having a predetermined format on a temporary memory(8). The photographing having the predetermined format is read and converts the converted horizontal size into an original horizontal size so as to have a normal format. The photographing data of the normal format is converted into brightness and color difference data, thereby having each format, and stored on a temporary memory. The brightness and the color difference stored on the temporary memory are composed and stored on the temporary memory. The composed brightness and color difference data are converted into a television signal and output.

Description

How to adjust the image size of a digital still camera {Method for adjusting the size of image in DSC}

The present invention relates to an image adjusting method of a digital still camera.

More specifically, when photographing a subject using a digital still camera, the horizontal size of the photographing data of the photographed subject is input differently and signal processed, and converted to a normal format so that the subject is output slimmer or fatter than the actual photographed subject. It relates to a method for adjusting the image size of a digital still camera.

In general, a digital electronic still camera is a camera that converts image information into an electrical signal and electrically performs all signal processing such as processing, recording, and playback.

Unlike a camera using a silver salt film, the digital electronic still camera does not need a dark room work for developing work or chemical processing, and it is possible not only to immediately check the captured image but also to record the recorded image information electronically. Post-processing and remote transmission through the advantage that can be used is the situation is gradually expanded.

Current digital still cameras can be divided into two types of CCD driving modes, which can be divided into monitoring mode and capture mode.

First, in the monitoring mode, the CCD data is converted into luminance (Y) and chrominance data (Cr) (Cb) in 4: 2: 2 format, and then converted into a size to make the NTSC or PAL method of the analog signal in hardware. And output it to a television or TFT LCD.

Since the signal output to the above-described television or TFT LCD is a moving image, an image of 10 frames or more must be processed per second. In this case, if there are many pixels of CCD, the above-mentioned speed cannot be realized. Therefore, the entire CCD pixel is inputted with two lines on a horizontal or vertical line, and two lines are not input to reduce the data amount, and this signal is reduced in luminance and color difference. It converts the signal into a size for display and outputs it to a television or the like.

1 is a block diagram showing the configuration of a conventional digital electronic still camera.

As shown therein, the controller 1 controls the photographing of the subject, the electric signal conversion, the recording and the reproducing operation, the key input unit 2 which inputs the operation command according to the user's operation to the controller 1, Charged Coupled Device (CCD) 4 which captures an image of a subject incident through the lens 3, converts it into an electrical signal, and outputs the image, and under the control of the controller 1, The timing generator 5 for outputting the CCD driving pulse for adjusting the output and the CCD driving pulse of the timing generator 5 are mixed or converted to a predetermined potential and output to the CCD 4 at the CCD driving voltage. The CCD driver 12, the CDS / AGC (Correlated Double Sampling / Automatic Gain Control) 6, which adjusts the gain of the output signal of the CCD 4 and removes the noise, and the output signal of the CDS / AGC 6 The analog / digital converter 7 for converting the signal into a digital signal, According to the control of the control unit 1, the temporary memory 8 for temporarily storing the output signal and the reproduction signal of the analog-to-digital converter 7 and the compressed storage memory according to the control of the control unit 1 9) and a JPEG processor 10 for compressing a video signal stored in the temporary memory 8 into a Joint Photographic Coding Experts Group (JPEG) under control of the control unit 1, extending the original video signal, and outputting the original video signal. The encoder 10 converts the video signal extended by the processor 10 into a television signal under the control of the controller 1 and outputs the television signal.

In the above, the temporary memory 8 typically uses a direct random access memory (DRAM), and the compressed storage memory 9 typically uses a flash memory.

FIG. 2 is a diagram for explaining photographing data signal processing in FIG. 1.

FIG. 3 is a flowchart illustrating a signal processing method of photographing data when an output function is selected in a digital still camera, and FIG. 4 is a diagram illustrating a signal processing method of photographing data when a capture function is selected in a digital still camera. This is a flow chart.

As shown, when photographing a subject with the conventional digital electronic still camera configured by FIG. 1, the user presses the shutter key of the key input unit 2 while checking the subject through a viewfinder (not shown). do.

Then, the controller 1 determines the pressing of the shutter key, controls the timing generator 5 to drive the CCD 4 through the CCD driver 12.

The CCD 4 captures an image of a subject incident through the lens 3, and converts the captured image of the subject into an electrical signal under the control of the timing generator 5 and outputs the image.

The output signal of the CCD 4 is removed from the noise under the control of the control unit 1 in the CDS / AGC 6, the gain is adjusted, and then converted into a digital signal in the analog digital converter 7 to the temporary memory 8 It is stored in (S310).

The RGB signal stored in the above-described temporary memory 8 is read out, formed to have an X × Y format (see FIG. 2A), and stored in the temporary memory 8 (S320).

That is, the data photographed by the CCD 4 is removed from the horizontal and vertical lines so that the vertical lines at both ends thereof have a format of 360 × 240, which is converted into an NTSC or PAL format and output. Then, the image quality of the screen may be degraded, but the image may be displayed without distortion of the image.

The photographed data stored in the temporary memory 8 is converted into luminance Y and color difference data Cr (Cb) (see FIG. 2B) and stored in the temporary memory 8 (S330). The luminance Y and the color difference signal Cr Cb stored therein are synthesized (see FIG. 2C) and stored in the temporary memory 8 (S340).

As described above, the synthesized luminance (Y) and the color difference data (Cr) Cb of the temporary memory 8 are inputted to the encoder 11, converted into a television signal, and transmitted to be displayed on the image display apparatus (S350). .

The above description is a case where the data photographed by the digital still camera is directly output to the image display device according to FIG. 3, and FIG. 4 is the data captured by the digital still camera to be compressed and stored in the compression memory. Steps S410 to S430 of converting the converted data into the luminance Y and the color difference data Cr Cb are the same as the above-described steps S310 to S330, and thus a detailed description thereof will be omitted.

After performing the above-described steps S410 to 430, the luminance Y and the color difference data Cr converted in the step S430 are input to the JPEG processor 10 under the control of the controller 1, respectively. The data is converted into block units divided into 8x8 pixels, compressed according to the JPEG compression method, and the compressed data are sequentially stored in the compression storage memory 9 (S440).

That is, the digital electronic still camera converts the image of the subject photographed by the CCD 4 into an electrical signal according to the pressing of the shutter key of the key input unit 2, converts the image of the subject into a digital signal, and then compresses it according to the JPEG compression method. The storage is sequentially stored in the compressed storage memory 9.

In this way, when the photographing signal stored in the compression storage memory 9 is output and recorded by an image recording apparatus such as a video cassette tape recorder or a camcorder, or displayed on an image display apparatus such as a monitor or a television, the control unit 1 The photographed signals compressed and stored in the storage memory 9 are read out one by one and inputted to the JPEG processor 10 to restore the original photographed signals.

When the photographing signal is restored, it is input to the encoder 11, converted into a television signal, and then transmitted to the image display apparatus or recorded in the image recording apparatus.

However, in order to adjust the horizontal size of the data captured by the digital still camera as described above, the image data processed and compressed by the digital still camera is transferred from the PC into a file, and an image editing application program provided in the PC is used. There was a problem in that the horizontal size of the subject must be converted by a software method.

Accordingly, an object of the present invention, when taking a subject using a digital still camera so as to solve the above-mentioned problems, and receives a different horizontal signal size of the photographing data of the photographed subject, and converts it into a normal format to actually shoot The present invention provides a method for resizing an image of a digital still camera, which outputs slimmer or fatter than a subject.

1 is a block diagram illustrating a configuration of a general digital still camera;

FIG. 2 is a diagram for explaining photographing data signal processing in FIG. 1; FIG.

3 is a flowchart illustrating a signal processing method of photographing data when an output function is selected in a digital still camera;

4 is a flowchart illustrating a signal processing method of photographing data when a capture function is selected in a digital still camera;

5 is a flowchart illustrating an operation of obtaining a slim result from data photographed by a camera having the configuration of FIG. 1 and outputting the result through a video display device;

FIG. 6 is a flowchart illustrating an operation for obtaining a fat result from data photographed by a camera having the configuration of FIG. 1 and outputting the result through an image display device; FIG.

7 is a flowchart illustrating an operation of obtaining a slim result from data photographed by a camera having the configuration of FIG. 1 and storing the result in a memory for compression;

FIG. 8 is a flowchart illustrating an operation for obtaining a fat result from data photographed by a camera having the configuration of FIG. 1 and storing the result in a memory for compression.

* Description of Signs of Main Parts of Drawings *

1 control unit 2 key input unit

3: lens 4: CCD

5: timing generator 6: CDS / AGC

7: analog / digital converter 8: temporary memory

9 memory for compressed storage 10 JPEG processor

11 Encoder 12 CCD Driver

In the method for adjusting the horizontal size of the photographing data of the digital still camera according to the present invention for achieving the above object, the present invention has a format in which only the horizontal size is changed larger than the normal format of the photographing data input through the CCD, Or have a format in which only the horizontal size is changed to be smaller, and horizontal data is removed or added at regular intervals before converting the RGB data of the changed format into luminance and color difference data, so that the object is thinner or fatter than the original subject. It is characterized in that a subject having a size can be obtained.

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

In the present invention, since the configuration of the digital still camera has the same configuration as that shown in FIG. 1, a detailed description thereof will be omitted, so that the digital still camera may be operated by the digital still camera of the present invention instead of the general digital still camera. Only the control unit 1 with different functions will be described briefly.

When the key signal of the key input unit 2 for adjusting the size of the photographed subject is input, the controller 1 forms a format such that the photographing data input through the CCD 4 has a larger horizontal size than the normal format. Alternatively, the format may be formed to have a smaller horizontal size, and then horizontal data may be removed or added to have a normal format before being converted into the luminance Y and the color difference signal Cr or Cb. The entire system is controlled so that the compression data stored in the data or the data displayed on the image display device and displayed are converted into slim or fat as desired by the user.

The image size adjusting method of the digital still camera according to the present invention configured as described above will be described in more detail with reference to the accompanying drawings.

FIG. 5 is a flowchart illustrating an operation of obtaining a slim result from data photographed by a camera having the configuration of FIG. 1 and outputting the result through a video display device.

As illustrated, when a person who is photographing a subject using a digital still camera inputs a signal to display a subject photographed by the key input unit 2 on the image display device and looks slim, the controller 1 ) Recognizes this and receives the photographing data of the CCD 4 (S510), and if the normal format is X × Y, the vertical size is fixed and the horizontal size is converted to (X + α) × Y format so that the temporary memory ( 8) and store (S520).

Read the captured data stored in the temporary memory 8 in the above-described format to remove horizontal RGB data at predetermined intervals so as to have a normal format X × Y, and then convert it into luminance (Y) and color difference (Cr) (Cb) data. The memory is stored in the temporary memory 8 (S530).

Thus, the luminance Y and the color difference Cr (Cb) stored in the temporary memory 8 are synthesized and stored in the temporary memory 8, and the synthesized luminance Y and the color difference Cr and Cb are stored in the encoder ( 11) it is converted into an NTSC / PAL type television signal and transmitted to the video display device (S540).

At this time, the subject displayed by the image display device is thinner than the subject photographed by the digital still camera.

FIG. 6 is a flowchart illustrating an operation for obtaining a fat result from data photographed by a camera having the configuration of FIG. 1 and outputting the resultant image through an image display device.

As illustrated, when a person photographing a subject using a digital still camera inputs a signal to make the subject look fat when the subject photographed by the key input unit 2 is displayed on the image display device, the controller 1 ) Recognizes this and receives the photographing data of the CCD 4 (S610), and if the normal format is X × Y, the vertical size is fixed and the horizontal size is converted to (X-α) × Y format. The data is stored in the memory 8 (S620).

The photographed data stored in the temporary memory 8 is read in the above-described format, horizontal data is added at predetermined intervals to have a normal format X × Y, and then converted into luminance (Y) and color difference (Cr) (Cb) data. In operation S630, the temporary memory 8 is stored in the temporary memory 8.

Thus, the luminance Y and the color difference Cr (Cb) stored in the temporary memory 8 are synthesized and stored in the temporary memory 8, and the synthesized luminance Y and the color difference Cr and Cb are stored in the encoder ( 11) to convert to the NTSC / PAL type television signal to be transmitted to the video display device (S640).

At this time, the subject displayed by the image display device is outputted fatter than the subject photographed by the digital still camera.

7 is a flowchart illustrating an operation of obtaining a slim result from data photographed by a camera having the configuration of FIG. 1 and storing it in a compression memory.

As illustrated, when a person who is photographing a subject using a digital still camera captures a photographed subject and compresses a slim subject, through the key input unit 2, the controller 1 Recognizing this, the photographing data of the CCD 4 is input (S710), and if the normal format is X × Y, the vertical size is fixed, and the temporary memory 8 is formed to have a format of (X + α) × Y in which only the horizontal size is converted. Save to (S720).

The photographed data stored in the temporary memory 8 is read in the above-described format, and the horizontal data is removed at a predetermined interval so as to have a normal format X × Y, and then converted into luminance (Y) and color difference (Cr) (Cb) data. The memory is stored in the temporary memory 8 (S730).

The luminance (Y) and the color difference (Cr) (Cb) stored in the temporary memory 8 are input to the JPEG processor 10, converted into 8x8 pixel divided blocks, and compressed. (S740).

Therefore, the data compressed in the compression memory 9 is expanded by the JPEG processor 10, and then converted into an NTSC / PAL type television signal through the encoder 11 and transmitted to the video display device.

As a result, a much thinner subject may be viewed through the image display device than the subject photographed by the digital still camera.

FIG. 8 is an operation flowchart for obtaining a fat result from data photographed by a camera having the configuration of FIG. 1 and storing the result in a memory for compression, as shown in FIG. 8. A person photographing a subject using a digital still camera as shown. When the signal to capture the subject to be photographed and compress the subject in the slim state is input through the key input unit 2, the controller 1 recognizes this and receives the photographing data of the CCD 4 (S810) to receive the normal data. If the format is X × Y, the vertical size is fixed and stored in the temporary memory 8 so as to have a format of (X-α) × Y in which only the horizontal size is converted (S820).

The photographed data stored in the temporary memory 8 is read in the above-described format, horizontal data is added at predetermined intervals to have a normal format X × Y, and then converted into luminance (Y) and color difference (Cr) (Cb) data. The data is stored in the temporary memory 8 (S830).

The luminance (Y) and the color difference (Cr) (Cb) stored in the temporary memory 8 are inputted by the JPEG processor 10, converted into units of 8x8 pixel blocks, compressed, and compressed. Save to (S840).

Therefore, the data compressed in the compression memory 9 is expanded by the JPEG processor 10, and then converted into an NTSC / PAL type television signal through the encoder 11 and transmitted to the video display device.

As a result, a much fatter subject can be viewed through the image display device than a subject photographed with a digital still camera.

Accordingly, as described above, in order to adjust the horizontal size of the data captured by the digital still camera, the present invention generally receives the compressed data that is processed by the digital still camera and is received in the form of a file from the PC to the PC. Using the image editing application to convert the horizontal size of the subject in a software way, the digital still camera itself has the effect of adjusting the horizontal size of the subject in hardware to obtain the result. have.

Claims (6)

Fixing the vertical size in the normal format of the photographing data input through the CCD, converting the horizontal size, and storing the photographing data having a predetermined format in a temporary memory; Read shooting data of a predetermined format stored in the temporary memory to convert the variable horizontal size to the original horizontal size to have a normal format, and convert the shooting data of the normal format into luminance and color difference data to have respective formats. Storing in a temporary memory; Synthesizing luminance and chrominance data having respective formats in the temporary memory and storing them in the temporary memory; And And converting the synthesized luminance and chrominance data of the temporary memory into a television signal and outputting the converted television signal. The digital still image of claim 1, wherein when the variable horizontal size is larger than the horizontal size of the normal format, the horizontal data is removed and converted to the normal format at a predetermined interval before conversion into luminance and color difference data. How to resize the camera image. The digital still image of claim 1, wherein when the variable horizontal size is smaller than the horizontal size of the normal format, horizontal data is added to the normal format at a predetermined interval before conversion into luminance and color difference data. How to resize the camera image. Fixing the vertical size in the normal format of the photographing data input through the CCD, converting the horizontal size, and storing the photographing data having a predetermined format in a temporary memory; Read shooting data of a predetermined format stored in the temporary memory to convert the variable horizontal size to the original horizontal size to have a normal format, and convert the shooting data of the normal format into luminance and color difference data to have respective formats. Storing in a temporary memory; And And converting the luminance and chrominance data stored in each of the formats into the temporary memory in units of divided blocks and compressing the compressed data. The digital still image of claim 4, wherein when the variable horizontal size is larger than the horizontal size of the normal format, the horizontal data is removed and converted to the normal format at a predetermined interval before conversion to luminance and color difference data. How to resize the camera image. The digital still image of claim 4, wherein when the variable horizontal size is smaller than the horizontal size of the normal format, horizontal data is added to the normal format at a predetermined interval before conversion into luminance and color difference data. How to resize the camera image.