KR20010036217A - Method of displaying three-dimensional image and apparatus thereof - Google Patents

Abstract

PURPOSE: A method and apparatus for displaying a three-dimensional image are provided to convert a two-dimensional image signal into a three-dimensional image signal and display the three-dimensional image signal through a screen or store the three-dimensional image signal in a recording medium. CONSTITUTION: An A/D converting unit(18) converts an analog image signal into a digital image signal. A control and clock generating unit(20) is synchronized to a horizontal and vertical synchronous signal for generating various clocks and a control signal. First and second memories(26,28) is alternately operated according to odd and even field periods under a control of the control and clock generating unit(20) for storing the digital image data of the A/D converting unit(18) by one field. Left and right image converting units(32,34) receive the digital image data stored in the first memory(26) and performs a left image conversion process, and receives the digital image data stored in the second memory(28) and performs a right image conversion process. A multiplexer(36) synthesizes the digital image data output from the left and right image converting units(32,34) according to the odd and even field. A D/A converting unit(38) converts the digital image data output from the left and right image converting units(32,34) into an analog image signal. A monitor(42) displays an output of the D/A converting unit(38) as a pseudo three-dimensional image signal on a screen.

Description

Method for displaying three-dimensional images and apparatus thereof

The present invention relates to a three-dimensional image display, in particular, a three-dimensional image display method for converting a general video signal consisting of a two-dimensional image to a three-dimensional image of a three-dimensional image to be displayed on the screen or recorded on the recording medium and the stereoscopic image accordingly It relates to an implementation device.

Techniques for recording and reproducing three-dimensional images have been steadily advanced in this field because three-dimensional stereoscopic images are much more real than two-dimensional images commonly seen on the screens of conventional television receivers. Although certain and typical three-dimensional images are obtained as a result of photographing and editing through two or more cameras, the cost increases three to seven times as compared to the case of two-dimensional image production. Various attempts have been made in various prior arts to obtain three-dimensional images from two-dimensional images taken with one camera to solve such a problem of cost increase.

Referring to FIG. 1, which shows a representative prior art principle, a circle of solid lines, shown as reference numeral 50 in the screen border P, is shown. The reference numeral 50 denotes the primary image and is captured at the left time, and the reference numeral 51 indicating the circle indicated by the dotted line denotes the secondary image and is captured at the right time. Therefore, the difference between the left and the right view causes a phenomenon to feel the virtual depth, and thus a stereoscopic image is implemented using the afterimage effect and the difference in time. In addition, as shown by reference numerals A, B, and C, the difference between the left and right views increases and decreases depending on the distance. The principle of the prior art for showing the image as shown in Figure 1, by separating the video signal into the odd field and even field through the delay and amplification of the synchronization signal separated in the two-dimensional video signal, and delayed each separated field It will be synthesized later. However, as shown in FIG. 1, the method of implementing the stereoscopic image as described above is difficult to feel the stereoscopic feeling because the delay amounts of the delay periods T1, T2, and T3 are all the same. That is, since the above-described conventional technology synthesizes each field by delaying a predetermined time, the viewer who wears a clairvoyant mirror does not substantially feel the perspective, the stereoscopic feeling, and the sense of presence.

Figure 2 showing another prior art also has the same problems as the prior art described above. That is, since the first and second memories have the technical principle of making a three-dimensional image pseudo-scanned by making the left and right overscans of the screen, the viewer wearing a clairvoyant glasses with respect to the displayed image lacks perspective processing. You will not actually feel the three-dimensional, perspective and presence.

Therefore, when the 2D image is processed and the 3D image is reproduced through a screen such as a TV, an improved and advanced technology that makes it possible to reproduce the image more realistically by making a sense of stereoscopic and perspective with respect to the displayed image. This is desperately desired.

Accordingly, it is an object of the present invention to provide a method and apparatus that can solve the above problems of the prior art.

Another object of the present invention is to provide a stereoscopic image display method for converting a general image signal consisting of a two-dimensional image into a three-dimensional image signal, which is a three-dimensional image to display on a screen or to record on a recording medium, and an apparatus for implementing a stereoscopic image accordingly. have.

It is still another object of the present invention to receive a 3D image by processing a 2D image to display a 3D image through a screen such as a TV, and to display a 3D image that can reproduce the image more faithfully by making a 3D image and a perspective sense with respect to the displayed image. A method and apparatus are provided.

Still another object of the present invention is to receive a two-dimensional image signal or a television broadcast signal recorded on a conventional video tape and to display a pseudo three-dimensional image signal on the screen so that the three-dimensional processed three-dimensional image signal can be seen through the viewing glasses An improved method and apparatus for displaying is provided.

According to the present invention for achieving the above object, a method for converting a two-dimensional composite video signal into a three-dimensional stereoscopic video signal, the digital image data separated from the composite video signal to the odd field and even field Dividing and storing in a memory; Performing left image conversion processing on the digital image data of the odd field stored in the memory and performing right image conversion processing on the digital image data of the even field; And converting the left and right image-converted digital image data into analog image signals for each field and then recording them on a recording medium or displaying them on a screen.

According to the technical principle of the present invention, an apparatus for converting a two-dimensional composite image signal into a three-dimensional stereoscopic image signal, by digitally processing the analog image signal separated from the synchronization signal and the chrominance signal from the two-dimensional composite image signal An A / D converter for providing digital image data; A control and clock generator for generating various clocks and control signals necessary therein in synchronization with the horizontal and vertical synchronization signals separated from the two-dimensional composite image signal; First and second memories under the control of the control and clock generators and alternately operating in odd and even field periods, and storing digital image data of the A / D converter applied during operation one field in an internal storage area, one field each; ; Receiving digital image data stored in the first memory to perform a left image conversion processing perspective based on the left eye, and receiving the digital image data stored in the second memory to perform a right image conversion processing perspective based on the right eye A left and right image conversion unit to perform; A multiplexer for synthesizing the left and right image converted digital image data respectively output from the left and right image converters according to odd and even fields; A D / A converter for converting left and right image converted digital image data output from the multiplexer into an analog image signal; In order to display the 3D stereoscopic image signal through the viewing glasses, display means for displaying the output of the D / A conversion unit alternately for each field on the screen as a pseudo stereoscopic image signal.

According to the configuration of the present invention described above, the image displayed by the left and right image conversion processing, which is processed based on the left eye and the right eye, can be reproduced with more sense of presence by making the stereoscopic sense and the perspective sense.

The above and other objects, features and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings.

1 and 2 are views for explaining the prior art,

3 is a block diagram of a stereoscopic image display device according to an embodiment of the present invention;

4 and 5 are diagrams for explaining the function of the specific block of FIG.

6 is a block diagram of a stereoscopic image recording apparatus according to another embodiment of the present invention.

Hereinafter, a preferred embodiment of the present invention for a stereoscopic image display method for converting a two-dimensional image into a three-dimensional image signal, which is a three-dimensional image, to be displayed on a screen or to be recorded on a recording medium, and an apparatus for implementing the stereoscopic image according to the same, will be described in detail.

First, FIG. 3 is a block diagram of a stereoscopic image display device according to an embodiment of the present invention. Referring to FIG. 3, the input processing unit 12, the color demodulation circuit 14, the synchronization signal separation unit 16, the A / D conversion unit 18 for digitally converting the analog output, the control and clock generation unit 20 ), The first and second memories 26 and 28, the left and right image converters 32 and 34, the depth adjuster 30, and the multiplexing, which perform left and right image conversion processing so as to feel a three-dimensional sense and perspective. Multiplexer (36), D / A converter (38) for outputting an analog video signal, vertical synchronization generator (22), infrared transmission for transmitting infrared rays for switching the liquid crystal shutter of viewing glasses in synchronization with the vertical synchronization A stereoscopic image display including a unit 24, a mode switching switch 40 for providing two-dimensional and three-dimensional viewing modes, liquid crystal shutter glasses 50 for viewing, and a monitor 42 for displaying an image on a screen. The device is shown.

In the apparatus of FIG. 3, the monitor 42 is called a cathode ray tube of a color television receiver having a typical 3: 4 or 16: 9 aspect ratio, and an input signal IN applied to the input terminal 10 is applied to a conventional video tape. Assuming that it is a recorded two-dimensional video signal or television broadcast signal, each block and overall operation of FIG. 3 will be described below. First, a viewer who was watching a television broadcast through the monitor 42 wants to view the television broadcast in a stereoscopic image, or a user inserts a normal video tape into a video tape recorder to view the stereoscopic image. Press the 3D mode key by remote controller or manual operation. Then, the control and clock generator 20 of FIG. 3 recognizes this and applies the switching control signal CON to the mode switching switch 40. Accordingly, the mode switching switch 40 is switched to connect the output terminal of the D / A converter 38 and the input terminal of the monitor 42. This is the three-dimensional viewing mode. In this case, the viewer can watch a three-dimensional processed stereoscopic signal by wearing viewing glasses and looking at the monitor. This is because a pseudo stereoscopic image signal according to the present invention is displayed on the screen with a perspective, and the functions and roles of the functional blocks of FIG. 3 will be described below to thoroughly understand the image processing method.

The input processor 12 adjusts a gain to stabilize the composite video signal IN applied through the input terminal 10, and the synchronization signal separator 16 inputs the input composite video signal output from the input processor 12. The horizontal and vertical synchronization signals are separated from each other. The color demodulation circuit 14 separates the luminance (luminance) signal and the color difference (chrominance) signal from the input processed composite video signal. The A / D converter 18 digitally converts the analog output output from the color demodulation circuit 14 in response to an applied sampling clock CLK0 and outputs it as digital image data. The control and clock generator 20 generates various clocks CLK0 and CLK1 to n and a control signal CON necessary therein in synchronization with the horizontal and vertical synchronization signals output from the synchronization signal separator 16. do. The various clocks CLK0 and CLK1 to n and the control signal CON are applied to each block corresponding to the connection. The first and second memories 26 and 28, which are odd field and even field memories, are alternately operated according to odd and even field periods under the control of the control and clock generator 20, and are applied during an enable operation. The digital image data of the A / D converter 18 is stored one field each in an internal storage area. The left and right image converters 32 and 34 receive the digital image data stored in the first memory 26 and perform a left image conversion process, which is processed in perspective based on the left eye, and stored in the second memory 28. The digital image data is received to perform a right image conversion process that is processed in perspective based on the right eye. For example, when the left image converting unit 32 receives the digital image data stored in the first memory 26 and performs the left image converting process, which is processed based on the left eye, the lower left part of the screen is the largest and closest image. The highlighted image is displayed, and the upper right portion is the smallest and the farthest image is displayed. This left image conversion process will be more clearly understood with reference to FIG. 4, which is shown in contrast to the prior art screen of FIG. FIG. 4 illustrates the image separation between fields represented by the image conversion processing of the left and right image converters 32 and 34 of FIG. 3, and the delay amounts of the delay periods D1, D2, and D3 are perspectively processed to be different. Here, the delay amount of the delay section D1 is the largest among the delay sections D1, D2, and D3, and the delay amount of the delay section D3 is the smallest. The left and right image conversion processing may be processed in software or hardware in a processing program such as a digital signal processing processor (DSP). Software processing is more preferably used in an environment equipped with a computer or the like. Here, the controller 30 may be connected to the left and right image converters to adjust perspective depths related to viewing the left and right images as desired within a set range. According to the adjustment of the adjusting unit 30, the viewer can make the depth of perspective very large or small, which will be more apparent with reference to FIG. 5 is a view showing that the depth of perspective changes according to the adjustment of the control unit 30, the narrowest perspective angle is given as the length L connecting the point E and E ', the widest point and point E2 and The length connecting E2 'is L + 2 (K1 + K2). 3, the multiplexer 36 synthesizes the left and right image converted digital image data output from the left and right image converters 32 and 34 according to odd and even fields. The multiplexer 36 outputs the odd and even fields in response to the delayed vertical synchronization signal DV-sync from the vertical synchronization generator 22. The D / A converter 38 converts the left and right image converted digital image data output from the multiplexer 36 into an analog image signal. Accordingly, as the output of the D / A converter is alternately displayed on the screen as a pseudo stereoscopic image signal on the screen, the viewer displays the three-dimensional stereoscopic image signal on the monitor 42 to the liquid crystal shutter glasses 50 for viewing. You will see through. Here, the viewing liquid crystal shutter glasses 50 is composed of an infrared receiver 51 for receiving infrared light from the infrared transmitter 24 and liquid crystal shutters 52 and 53 alternately operated according to a vertical synchronization signal.

6 is a block diagram of a stereoscopic image recording apparatus according to another embodiment of the present invention. The configuration of FIG. 6 is almost the same as that of FIG. 3 except for the recording mechanism control unit 60 and the recording medium 62. Therefore, the configuration of FIG. 6 is a modification of FIG. 3, which is an output of the D / A converter 38 so that the 3D stereoscopic image signal can be viewed later through the glasses for viewing regardless of whether or not the real time processing is performed. Are alternately recorded on a recording medium such as a video tape or a compact disc. In addition, if the memory capacity is sufficiently secured, the digital image data subjected to left and right image conversion processing may be directly stored on a hard disk or the like without having to replace the analog signal.

Therefore, when displaying a two-dimensional image as a three-dimensional image, a three-dimensional and a perspective feeling can be reliably sensed with respect to the image displayed in three-dimensional by performing left and right image conversion processing which is processed in perspective based on the left and right eyes.

As described above, according to the present invention, the image displayed by the left and right image conversion processing, which is processed based on the left eye and the right eye, has a merit of making a sense of three-dimensional and perspective and reproduce the image more gracefully.

Although the above-described invention has been described with reference to the drawings and limited by way of example, various changes and modifications are possible within the scope without departing from the spirit of the invention according to the matter. For example, the three-dimensional change technology of the present invention can be easily applied and applied to cable television and large outdoor televisions, commercial displays, computer monitors, and future high-definition televisions.

Claims (9)

In the method for converting a two-dimensional composite video signal into a three-dimensional stereoscopic video signal: Dividing the digital image data separated from the composite image signal into an odd field and an even field and storing them in a memory; Performing left image conversion processing on the digital image data of the odd field stored in the memory and performing right image conversion processing on the digital image data of the even field; And converting the left and right image converted digital image data into an analog image signal for each field and recording the same on a recording medium or displaying on a screen. A method for receiving a two-dimensional image signal or a television broadcast signal recorded on a conventional video tape and displaying a pseudo three-dimensional image signal on a screen so that the three-dimensional processed three-dimensional image signal can be viewed through viewing glasses. Dividing the digital image data separated from the 2D image signal into an odd field and an even field and storing the digital image data in a field memory; Performing left image conversion processing for perspective processing of the odd field digital image data stored in the field memory based on the left eye, and performing right image conversion processing for perspective processing of the even field digital image data with respect to the right eye; ; And converting the left and right image converted digital image data into an analog image signal for each field and displaying the same as a pseudo stereoscopic image signal on the screen. The method of claim 2, wherein the left and right image conversion processing is performed in hardware. The method according to claim 2, wherein the left and right image conversion processing is performed in software by a processing program such as a digital signal processing processor. An apparatus for converting a two-dimensional composite video signal into a three-dimensional stereoscopic video signal: An A / D converter for digitally processing the analog image signal separated from the synchronous signal and the chrominance signal from the two-dimensional composite image signal to provide digital image data; A control and clock generator for generating various clocks and control signals necessary therein in synchronization with the horizontal and vertical synchronization signals separated from the two-dimensional composite image signal; First and second memories under the control of the control and clock generators and alternately operating in odd and even field periods, and storing digital image data of the A / D converter applied during operation one field in an internal storage area, one field each; ; Receiving digital image data stored in the first memory to perform a left image conversion processing perspective based on the left eye, and receiving the digital image data stored in the second memory to perform a right image conversion processing perspective based on the right eye A left and right image conversion unit to perform; A multiplexer for synthesizing the left and right image converted digital image data respectively output from the left and right image converters according to odd and even fields; A D / A converter for converting left and right image converted digital image data output from the multiplexer into an analog image signal; And display means for alternately displaying outputs of the D / A conversion unit on a screen as a pseudo stereoscopic image signal so that the 3D stereoscopic image signal can be viewed through viewing glasses. Device. The apparatus of claim 5, further comprising an adjusting unit connected to the left and right image converters to adjust a perspective depth related to viewing of the left and right images as desired within a set range. The apparatus of claim 5, further comprising switching means for switching the output of the D / A converter and the analog video signal output to selectively view a two-dimensional image and a three-dimensional stereoscopic image signal through the display means. And further having. 6. The apparatus of claim 5, wherein the two-dimensional composite video signal is obtained from a tuner of a conventional video tape, camcorder, compact disc, or television receiver. A device for converting and recording a two-dimensional composite image signal into a three-dimensional stereoscopic image signal: An input processing unit for adjusting a gain to stabilize the composite video signal applied through an input terminal; A sync signal separator for separating a horizontal sync signal and a vertical sync signal from an input processed composite video signal output from the input processor; A color demodulation circuit for separating a luminance signal and a color difference signal from the input processed composite image signal; An A / D converter for digitally converting the analog output output from the color demodulation circuit and outputting the digital image data; A control and clock generator for generating various clocks and control signals necessary therein in synchronization with the horizontal and vertical synchronization signals output from the synchronization signal separator; First and second memories under the control of the control and clock generators and alternately operating in odd and even field periods, and storing digital image data of the A / D converter applied during operation one field in an internal storage area, one field each; ; Receiving digital image data stored in the first memory to perform a left image conversion processing perspective based on the left eye, and receiving the digital image data stored in the second memory to perform a right image conversion processing perspective based on the right eye A left and right image conversion unit to perform; A multiplexer for synthesizing the left and right image converted digital image data respectively output from the left and right image converters according to odd and even fields; A D / A converter for converting left and right image converted digital image data output from the multiplexer into an analog image signal; And recording means for alternately recording the output of the D / A converter on a recording medium for each field so that the 3D stereoscopic image signal can be viewed through glasses for viewing.