KR101244909B1 - Digital image processing apparatus for converting magnification and method for converting magnification of digital image processing apparatus - Google Patents

Abstract

The present invention relates to a digital image processing apparatus and a method of operating the same, and more particularly, a magnification conversion for reducing the number of operations by enlarging or reducing an image in an intermediate magnification state after initial magnification at an intermediate magnification during image magnification and reproduction. The present invention relates to a digital image processing and a magnification conversion method of a digital image processing apparatus. The magnification conversion image display apparatus is a digital image processing apparatus that displays an image obtained after photographing a subject. When a zoom key and a first zoom key signal input to enlarge or reduce an image to be displayed for playback are received, the original image is randomized. And controlling the display to enlarge and reduce the image at an intermediate magnification thereof, and to enlarge or reduce the image to be enlarged at the intermediate magnification when the zoom key signal is received.

Description

Digital image processing apparatus for converting magnification and method for converting magnification of digital image processing apparatus

1A to 1C are diagrams for explaining stepwise enlargement of an image in a conventional digital image processing apparatus.

FIG. 2 is a rear view illustrating a rear shape of a digital camera as a digital image processing apparatus according to the present invention.

3 is a diagram illustrating the overall configuration of the digital camera of FIG. 2.

4 is a flowchart illustrating a method of converting a magnification of a digital image display device according to the present invention.

FIG. 5 is a diagram for describing a magnification conversion in FIGS. 3 and 4.

The present invention relates to a digital image processing apparatus and a method of operating the same, and more particularly, a magnification conversion for reducing the number of operations by enlarging or reducing an image in an intermediate magnification state after initial magnification at an intermediate magnification during image magnification and reproduction. The present invention relates to a digital image processing and a magnification conversion method of a digital image processing apparatus.

When an image stored in a digital camera as a conventional digital image processing apparatus is enlarged and reproduced, it is increased from a low magnification to a high magnification step by step.

In the reproducing mode of the digital camera, when the magnification button is input once to enlarge the original image (× 1.0), as shown in FIG. 1A, an image (× 1.1) which has been enlarged in one step is displayed as shown in FIG. Thereafter, each time the magnification button is operated, the magnification is displayed at an interval of x 0.1 to display an image as shown in FIG. 1C.

As described above, the enlarged playback function in the conventional playback mode is selected as the initial minimum magnification (for example, x 1.1) when the user inputs the zoom in button, and the user inputs the zoom button several times to change to the desired magnification. If you press the Zoom In button continuously, the magnification is gradually increased and displayed.

In addition, the magnification is generally increased linearly at intervals of × 0.1 for a natural magnification and trimming function. However, as the high resolution of the digital camera continues, the maximum magnification interval can be divided into 90 steps because the deterioration of the image quality is not high even when the 8 million pixel image is enlarged and reproduced up to a maximum x10 magnification. That is, a user who wants to search the image at the maximum magnification has an inconvenience of having to press the zoom button 90 times or wait until the image is displayed at a desired magnification for a long time.

SUMMARY OF THE INVENTION A technical problem to be solved by the present invention is to perform an initial magnification at an intermediate magnification during image magnification and then magnify a magnification conversion digital image processing and digital image processing apparatus to reduce the number of operations by enlarging or reducing an image in an intermediate magnification state. To provide a conversion method.

According to an aspect of the present invention, there is provided a digital image processing apparatus for displaying an image obtained after photographing a subject, including: a zoom key input to enlarge or reduce an image to be displayed and reproduced; And when the first zoom key signal is received, the original image is enlarged and displayed at an arbitrary intermediate magnification, and when the zoom key signal is received, the magnified image is enlarged or reduced at the intermediate magnification and displayed. It is preferred to include control means.

In the present invention, the control means is characterized in that the intermediate magnification is set to (maximum magnification-minimum magnification) / 2.

In the present invention, when the zoom key signal is received, the control means is characterized in that to enlarge or reduce the image magnified by the minimum magnification unit (x0.1) to display the image.

According to an aspect of the present invention, there is provided a method of converting a magnification of an image display apparatus, the method of converting a magnification of a digital image processing apparatus for displaying an image obtained after photographing a subject. When the signal is received, expanding and displaying the original image at an arbitrary intermediate magnification; And (b) enlarging or reducing the image magnified at the intermediate magnification when the signal for enlarging or reducing the image is received.

In the present invention, in the step (a), the intermediate magnification is characterized in that (maximum magnification-minimum magnification) / 2.

In the present invention, in the step (b), when a signal for enlarging or reducing the image is received, the image enlarged to the intermediate magnification is displayed by being enlarged or reduced in the minimum magnification unit (× 0.1). .

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

FIG. 2 is a rear view illustrating a rear shape of a digital camera as a digital image processing apparatus according to the present invention.

The shutter release button 21 opens and closes to expose the CCD or film to light for a predetermined time, and records the image on the CCD by properly exposing the subject in conjunction with an aperture (not shown).

The eyepiece unit 23 of the viewfinder is a small window of a camera for setting a composition by looking at a subject to be photographed.

The function button 25 is a key input to execute various menus related to digital camera operation. In particular, the function button 25 is a button used to activate or select an exposure area for controlling exposure or to move an exposure area.

The wide-angle zoom button 27w or the tele-zoom button 27t increases the angle of view or narrows the angle of view depending on the input, particularly when the size of the selected exposure area is to be changed. When the wide-zoom button 27w is input, the size of the selected exposure area is reduced, and when the tele-zoom button 27t is input, the size of the selected exposure area is increased.

3 is a diagram illustrating the overall configuration of the digital camera of FIG. 2.

The optical system OPS including the lens unit and the filter unit optically processes light from a subject. The lens unit of the optical system OPS includes a zoom lens, a focus lens, and a compensation lens.

When the user presses the wide-angle zoom button 27w or the telephoto-zoom button 27t included in the user input unit INP, a corresponding signal is input to the microcontroller 512. Accordingly, as the microcontroller 512 controls the lens driver 510, the zoom motor M _Z is driven to move the zoom lens. That is, when the wide angle-zoom button 27w is pressed, the focal length of the zoom lens is shortened to widen the angle of view, and when the telephoto-zoom button 27t is pressed, the focus of the zoom lens is pressed. The longer the length, the narrower the angle of view. Here, since the position of the focus lens is adjusted while the position of the zoom lens is set, the angle of view is hardly influenced by the position of the focus lens.

Meanwhile, in the auto focus mode, the focus motor M _F is driven by the main controller embedded in the digital signal processor 507 controlling the lens driver 510 through the micro controller 512. As a result, the focus lens is moved from the front to the rear, and in this process, the position of the focus lens where the high frequency component of the image signal is the largest, for example, the number of driving steps of the focus motor M _F is set.

The compensation lens compensates for the overall refractive index and is not driven separately. Reference numeral M _A denotes a motor for driving an aperture (not shown).

In the filter portion of the optical system OPS, an optical low pass filter removes optical noise of high frequency components. Infra-red cut filter blocks the infrared component of incident light.

A photoelectric conversion unit (OEC) of a charge coupled device (CCD) or a complementary metal-oxide-semiconductor (CMOS) converts light from an optical system (OPS) into an electrical analog signal. Here, the digital signal processor 507 controls the timing circuit 502 to control the operations of the photoelectric conversion unit (OEC) and the analog-digital conversion unit 501. A CDS-ADC (Correlation Double Sampler and Analog-to-Digital Converter) element 501 as an analog-to-digital conversion section processes an analog signal from the photoelectric conversion section OEC to remove high frequency noise, And then converted into a digital signal.

The real-time clock 503 provides time information to the digital signal processor 507. The digital signal processor 507 processes digital signals from the CDS-ADC device 501 to generate digital image signals classified into luminance and chrominance signals.

Although not shown, the light emitting unit LAMP driven by the microcontroller 512 under the control of the main controller embedded in the digital signal processor 507 may include a self-timer lamp, an auto-focus lamp, a mode indicating lamp, and Flash standby lamp is included. The user input unit INP includes a shutter release button 11, function buttons 21, a wide-angle zoom button 25w, a telephoto-zoom button 25t, and the like.

A digital image signal from the digital signal processor 507 is temporarily stored in a DRAM (Dynamic Random Access Memory) 504. The EEPROM (Electrically Erasable and Programmable Read Only Memory) 505 stores algorithms and setting data necessary for the operation of the digital signal processor 507. In the memory card interface 506, a user's memory card is detached.

The digital image signal from the digital signal processor 507 is input to the LCD driver 514, whereby the image is displayed on the color LCD panel 29.

On the other hand, the digital image signal from the digital signal processor 507 can be transmitted by serial communication via a universal serial bus (USB) connection portion 31a or an RS232C interface 508 and the connection portion 31b, and a video filter ( 509 and the video output unit 31c may be transmitted as a video signal. Here, the digital signal processor 507 incorporates a microcontroller therein.

The audio processor 513 outputs the audio signal from the microphone MIC to the digital signal processor 507 or the speaker SP and outputs the audio signal from the digital signal processor 507 to the speaker SP.

The magnification conversion digital image processing and magnification conversion method of the digital image processing apparatus according to the present invention may be performed in a control apparatus for the digital image processing apparatus as shown in FIG. 4. The main algorithm may be executed inside the digital signal processor 507 or the microcontroller 512 with the help of peripheral components in the controller.

The magnification conversion digital image processing and the magnification conversion method of the digital image processing apparatus will be described with reference to FIGS. 4 and 5.

When the function button 21 for reproducing the image stored in the camera is input from the user, as a control means, the digital signal processor 507 reproduces the image stored in the camera (step 401).

Thereafter, the digital signal processor 507 determines whether an enlarged button, that is, a telephoto-zoom button 27t input signal is received from the user (step 403).

When the telephoto-zoom button 27t signal is received, the digital signal processor 507 checks whether the image currently displayed on the color LCD panel 29 is in the original image state (× 1.0) (step 405).

As a result of the determination by the digital signal processor 507, when the image displayed on the color LCD panel 29 is in the original image state (x1.0), the resolution of the original image is checked (step 407).

After confirming the resolution of the original image, the digital signal processor 507 sets the magnification of the original image to an arbitrary initial intermediate magnification (step 409). The digital signal processor 507 sets the initial intermediate magnification to a magnification of (maximum magnification-minimum magnification) / 2 provided by the camera.

When the initial intermediate magnification is set, the digital signal processor 507 enlarges the original image according to the set intermediate magnification and displays it on the color LCD panel 29 (step 411). FIG. 5A shows the original image displayed on the color LCD panel 29. FIG. 5B shows the original image in the initial intermediate magnification state when the telephoto-zoom button 27t signal is input in FIG. 5A. It shows a magnified display.

As described above, when the user inputs a telephoto-zoom button 27t in the reproduction mode, the display magnification corresponding to the intermediate magnification is initially displayed unlike the beginning of the minimum magnification. For the purpose of the user, the intention of the user to enlarge the reproduction tends to check the focus state and the contents of the narrow portion of the image by enlarging the detailed portion, and therefore, when implementing a function such as the present invention, the desired enlargement is faster than before. You can access the magnification.

When the enlarged image is displayed on the color LCD panel 29 at the initial medium magnification, the digital signal processor 507 receives the wide-angle zoom button 27w or the tele-zoom button 27t input signal input to the user ( Step 413). The digital signal processor 507 receives a wide-zoom button 27w signal to reduce an image enlarged at an initial medium magnification, and receives a telephoto-zoom button 27t signal to enlarge an image enlarged at an initial medium magnification. .

Each time the digital signal processor 507 receives the wide-zoom button 27w, it linearly reduces the image enlarged at the initial intermediate magnification at intervals of 0.1, and the digital signal processor 507 causes the tele-zoom button ( Each time 27t) is received, an image enlarged at an initial intermediate magnification is linearly enlarged and displayed at an interval of x0.1 (step 415).

In FIG. 5B, an image enlarged at an initial intermediate stage is displayed on the color LCD panel 29. FIG. 5C shows an image enlarged at an initial intermediate magnification × 0.1 each time the telephoto-zoom button 27t is input in FIG. 5B. Shows linear expansion at intervals. In addition, FIG. 5D shows that the image enlarged at an initial intermediate magnification is linearly reduced at intervals of 0.1 by each time the wide-zoom button 27w is input in FIG. 5B.

The above operation is repeatedly performed until an image of a magnification desired by the user is displayed (step 417).

So far I looked at the center of the preferred embodiment for the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. Therefore, the disclosed embodiments should be considered in an illustrative rather than a restrictive sense. The scope of the present invention is defined by the appended claims rather than by the foregoing description, and all differences within the scope of equivalents thereof should be construed as being included in the present invention.

As described above, according to the present invention, after performing initial magnification at an intermediate magnification at the time of image magnification and reproduction, the desired magnification ratio is increased more quickly by reducing the number of operations than the conventional magnification or reduction by enlarging or reducing the image at an intermediate magnification state. It is convenient to have access to.

Claims (6)

A digital image processing apparatus for displaying an image obtained after photographing a subject, A zoom key input to enlarge or reduce the displayed image; And Control means for enlarging and displaying the original image at an arbitrary intermediate magnification when the first zoom key signal is received, and thereafter expanding or reducing the magnified image at the intermediate magnification and displaying the original image if the zoom key signal is received. Magnification conversion digital image processing apparatus comprising a. The method of claim 1, wherein the control means And the intermediate magnification is set to (maximum magnification-minimum magnification) / 2. The method of claim 1, wherein the control means Thereafter, when the zoom key signal is received, the magnification-converting digital image processing apparatus is further configured to display an enlarged or reduced process of the image magnified at the intermediate magnification by a minimum magnification unit (× 0.1). A magnification conversion method of a digital image processing apparatus that displays an image obtained after photographing a subject, (a) when an input zoom key signal is first received to enlarge or reduce an image to be reproduced and displayed, expanding and displaying the original image at an arbitrary intermediate magnification; And and (b) afterwards, when the zoom key signal is received, enlarging or reducing the image magnified at the intermediate magnification. The method of claim 4, wherein in step (a), And the intermediate magnification is (maximum magnification-minimum magnification) / 2. The method of claim 4, wherein in step (b), When the zoom key signal is received, the magnification conversion method of the image display apparatus, characterized in that the image enlarged to the intermediate magnification is magnified or reduced by the minimum magnification unit (x0.1).

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