KR101015813B1 - Method for zooming in visual presenters camera - Google Patents

Abstract

The present invention relates to a zooming method for a captured image of a camera, which has a mouse interface function, comprising: a first step of outputting and displaying a camera captured image on a signal-connected external device; A second step of moving the optical lens to a position of an enlargement area set by a user in the full screen displayed on the output; And a third step of performing a digital zoom-in operation based on the center point of the magnification area when the optical lens is moved, so that the user can enlarge and reduce the image with only a simple operation of the mouse pointer. By increasing the convenience of the user, for the set magnified area, first move the optical lens to the magnified area and then perform the digital zoom-in operation based on the center point of the set magnified area to view the magnified image without deterioration in image quality. It is a very useful invention.

Camera, Mouse Pointer, MPU, Zoom-In

Description

Method for zooming in visual presenters camera}             

1 illustrates an example in which a captured image of a camera is output on a monitor connected to a signal;

2 illustrates an example of a full screen output on a monitor and an enlarged area set in the full screen;

3 is a diagram showing the configuration of an embodiment of a camera according to the present invention, the real imager implemented a zoom method,

4 is a flowchart illustrating an exemplary embodiment of a zooming method in a camera according to the present invention.

[Description of Drawings]

10: imaging unit 20: A / D converter

30: Digital Signal Processing Unit (DSP) 40: MPU

50: memory

The present invention relates to a zooming method for a captured image of a real image camera having a mouse interface function.

In accordance with the situation in which the convenience of supplementary teaching materials is required to deliver more information in a limited time, in recent years, a physical burner is used for a more vivid and accurate information transfer centering on a presentation hall or a lecture hall. As shown in FIG. 1, a real image camera including an image pickup unit and a light box on which a subject is placed are included, and a control panel for operating the real image camera is provided at one side of the main body.

The physical imager configured as described above is an apparatus for photographing a subject (real) placed in the light box and transferring the image pickup unit of the physical imager camera to a connected display apparatus or recording the image on a recording medium.

For example, as illustrated in FIG. 1, when the physical imager camera is directly connected to a monitor, a book content photographed through an imaging unit of the physical imager camera may be viewed as a high resolution clear image through the monitor.

Meanwhile, the real image camera may display small letters on documents, maps, dictionaries, etc. on the display device through a zoom-in function, hereinafter, a conventional zoom made by the real image camera. The method will be briefly described.

In the related art, the zoom-in (or zoom-out) of the real image camera is performed based on the center point (1 (FIG. 1)) of the currently captured image.

Therefore, if the user's region of interest is outside the center of the photographed image, the user directly selects the region of interest in the photographed image, and then zooms in or zooms in on the selected region of interest with a key button or OSD provided on the control panel. There was a cumbersome problem of performing the zoom out directly.

Another conventional zooming method includes a digital zoom-in method using correlation between adjacent pixels through geometric transformation of a digital image. In this method, the distance between adjacent pixels when zooming-in is increased. This is farther than before zoom-in, resulting in a hole between adjacent pixels.

Therefore, this hole is filled with pixels of the average value of adjacent pixels or through various other algorithms. Until now, no matter which algorithm is used to fill the hole, there is a difference from the original pixel. The difference increases as the magnification of the enlargement increases.

As a result, when zoom-in is performed by the conventional method, a problem arises that the image quality is degraded.

Therefore, the present invention was created to solve the above problems, in the real-image camera having a mouse interface function to enable the user to enlarge and reduce the image by a simple operation of the mouse pointer, by the mouse pointer For the set magnified area, first, the optical lens is moved to the magnified area, and then the digital zoom operation is performed based on the center point of the set magnified area, thereby providing a zooming method in the real image camera so that the magnified image can be enjoyed without deterioration of image quality. The purpose is to.

According to an aspect of the present invention, there is provided a zoom method of a camera, including: a first step of outputting and displaying a camera photographed image on a signal-connected external device; A second step of moving the optical lens to a position of an enlargement area set by a user in the full screen displayed on the output; And a third step of performing a digital zoom-in operation based on the center point of the enlarged area when the optical lens is moved.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment of a zooming method in a real-image camera according to the present invention will be described in detail.

FIG. 3 is a block diagram of an embodiment of a real image camera including a zoom method according to the present invention, and converts and outputs an analog image captured from an image capturing unit (eg, a CCD camera) 10 to a digital image. An A / D converter 20; A digital signal processor 30 for analyzing and signal processing the digitally converted image; An MPU 40 for transmitting the signal-processed digital image to a signal-connected external device and controlling and performing a zoom operation according to the present invention; And a memory 50 which stores a predetermined position value with respect to the optical lens installed in the imaging unit 10.

On the other hand, the real picture camera of Figure 3 is basically provided with a plurality of input / output ports, analog video output port, PS / 2 port, USB port, RGB port is basically provided, the analog video output A TV is connected to the port, a mouse is connected to the PS / 2 port, a PC is connected to the USB port, and a monitor or a projector is connected to the RGB port.

4 is a flow chart illustrating a preferred embodiment of a zooming method of a physical imager camera according to the present invention. Hereinafter, the zooming method of FIG. 4 according to the present invention will be described in detail with reference to the configuration of FIG. 3. Shall be.

First, the physical image camera of FIG. 3 is connected to a mouse through the PS / 2 port and a monitor through an RGB port, and in this state, the imaging unit 10 is placed on the stage of the physical imager. The subject is photographed and the photographed image is output to the A / D converter 20. The imaging unit 10 outputs an image of about 25 frames per second.                     

When the photographed image is input, the A / D converter 20 converts and outputs the input analog image into a digital image, and the digital signal processor 30 analyzes and signals the digital image to be converted and output. The MPU 30 outputs the signal-processed digital image on a connected external device (monitor) (S10), thereby allowing a user to watch the captured image of the subject through a monitor, where the current mouse is connected. In this state, the mouse pointer is also displayed on the output image of the monitor.

In this state, in order to zoom-in a part of the captured image (S20), the user moves the captured image, that is, the entire screen on the monitor (A of FIG. If the start point (3 () of FIG. 2) and the end point ((4) of FIG. 2) of the magnification are specified, the MPU 40 is first set to a preset position with respect to the optical lens of the imaging unit 10. A value is stored in the memory 50 (S21), and then an enlarged area (B of FIG. 2) of a rectangle ((5) of FIG. 2) is set based on the specified points.

The MPU 40 may include four vertices of the entire screen (A of FIG. 2) among four vertices (3, 4, 6, and 7) of the enlarged rectangular region. 2 (8) to (11)) and the first vertex (Fig. 2 (6)), that is, the vertex with the shortest distance between the vertices ((12) in Fig. 2) is detected (S22), the detection Optical zoom is performed to move the optical lens of the imaging unit 10 to a vertex (S23). At this time, since the MPU 40 accurately knows the position of the optical lens, the optical lens moves more quickly. Will be done.                     

When the optical lens is moved to the detected vertex of the magnified area through the optical zoom, the MPU 40 stops the optical lens, and then the center point of the set magnified area ((13) of FIG. 2) By performing a zoom-in operation on the basis of the reference (S24), the user can enjoy the enlarged image of the enlarged area.

As described above, in the present invention, since the optical lens is first moved to the enlarged area and then digital zoom-in is performed based on the center point of the moved enlarged area, the number of holes between adjacent pixels is increased. Significantly reduced, it is possible to minimize the deterioration of the quality of the magnified image.

On the other hand, during the zoom-in operation, when the right button of the mouse is clicked (S30), the MPU 40 stops the zoom-in operation and advances the optical lens from the position value stored in the memory 50. After moving back to the set position (S31), the operations before the zoom-in, that is, outputting the captured image to the external monitor are normally performed.

As mentioned above, preferred embodiments of the present invention described above are disclosed for the purpose of illustration, and those skilled in the art can improve other various embodiments within the spirit and technical scope of the present invention disclosed in the appended claims below. Changes, substitutions or additions will be possible.

The zooming method of the real image camera according to the present invention as described above enables the user to enlarge and reduce the image with a simple operation of the mouse pointer, thereby increasing the convenience of the user, and for the set magnified area, By moving the optical lens to the magnification area and performing a digital zoom-in operation based on the center point of the set magnification area, it is a very useful invention that can enjoy the magnified image without deterioration of image quality.

Claims (6)

In the operating method of the real-time imager camera providing a mouse interface function, A first step of outputting and displaying a camera photographed image on a signal-connected external device; A second step of performing optical zoom to compare four vertices of the full screen displayed on the output screen with four vertices of a magnified area set by the user in the full screen, so that vertices having the shortest distance match with each other; And And a third step of performing a digital zoom-in operation based on the center point of the magnified area when the optical zoom is completed. The method of claim 1, In the second step, before performing the optical zoom, the zooming method of the camera according to claim 1, wherein the position value of the optical lens is stored in a memory. 3. The method of claim 2, And a fourth step of moving the optical lens back to a previous position with reference to the position value of the optical lens stored in the memory. The method of claim 3, wherein The fourth step is a zooming method of a real-image camera, characterized in that the right button of the mouse is clicked. delete delete

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