KR20010011383A - The Method to reventing the Reverse of Left and Right Image for Viewing Stereoscopic Image on CRT Monitor - Google Patents

Abstract

PURPOSE: A left/right field inversion preventing method is provided to prevent an inversion phenomenon of the left/right inversion in implementing 3 dimensional images on a CRT monitor of the PC by using an interlace scanning method so that it can offer better 3 dimensional image environment in the PC. CONSTITUTION: A left/right field inversion preventing method comprises steps of making one image by synthesizing a left stereoscopic image to an odd number line, and a right stereoscopic image to an even number line according to the dpi(dot per inch) of a graphic mode, displaying the synthesized image, displaying alternatively the left and the right stereoscopic image according to a cycle of a vertical frequency by performing an interlace scanning over the monitor, and displaying left/right LCD(Liquid Crystal Display) in synchronization with the vertical frequency.

Description

The method to reventing the Reverse of Left and Right Image for Viewing Stereoscopic Image on CRT Monitor}

An object of the present invention is a ROM for recording a method for preventing left and right field reversal when implementing interlaced stereoscopic image on a PC monitor.

[TECHNICAL FIELD OF THE INVENTION]

The present invention is a technology for preventing the reversal of the left and right when using the interlaced scanning method in the field of realizing stereoscopic images on a CRT monitor used by a computer.

[Private Technology]

The implementation of the stereoscopic image is expressed in various ways according to the method. In the case of the interlace method, the left and right image data on the right and left lines of the scanning line according to the resolution are monitored on the left and right two image data of the object, respectively. When the monitor is displayed, the odd and even fields are displayed alternately, and the left and right lenses of the electronic LCD shutter glasses are opened and closed according to the display sequence of each field. Three-dimensional image is implemented by using a method of making a three-dimensional image feel by looking at the bay. At this time, the image data inserted into the scanning line should always match the left and right images without changing with the monitor scan line, but there is a case that does not always match and the left and right images are reversed. The probability is 50%. Unlike in DOS, most programs based on Windows can move video data arbitrarily. In this case, 50% of left and right fields of stereoscopic images are reversed. For example, in a stereoscopic still image, a general image viewer has a 50% probability of reversing left and right fields of a stereoscopic image by moving or scrolling, and thus the user cannot feel a stereoscopic image with a 50% probability.

According to the present invention, the reference data are set and determined so that the image data inserted into the even scanning line is always located in the odd line and the right image data in the even line (or vice versa) according to the resolution of the graphic mode set in the PC. When image data is displayed according to a standard, a method of preventing the left and right images from being reversed when a stereoscopic image is implemented by always following the standard is recorded in a ROM.

There are several methods for representing 3D images according to the method. The stereoscopic image used in the interlacing method is produced by combining two images on the left and right sides into an odd line on the left side and an even line on the right side (or vice versa) according to the resolution of the graphic mode. When the image is displayed on the screen and the monitor is interlaced and the odd scan line field and the even scan line field are alternately displayed on the screen according to the period of the vertical frequency displayed on the monitor, the left and right images are alternately displayed on the screen by the synthesized image data. Is displayed. At this time, if the left and right LCDs of the LCD glasses are alternately displayed in accordance with the vertical frequency synchronization, only the image suitable for each eye is shown so that the user can feel the stereoscopic shape.

When creating one image, the left and right image data are alternately synthesized.

An interlaced stereoscopic image can be roughly classified into two types: one created with the left image as the head and one created with the right image as the head. These two methods are called left and right lines and right and right lines. In the case of left and right lines, the leading pixel of an image should be present in odd pixels of the entire window, and in the right and right lines, even pixels. If the image is left and right and you want to display it in a window, first display the image and then get its location information. At this time, after obtaining the y value of the head of the image, check the suitability of this position. If the position is not appropriate, subtract 1 from the original image and draw the image again. In case of left and right lines, the remaining value of y divided by 2 is 1, and in case of right-right line, the remaining value should be 0. Therefore, the program displays the stereoscopic image on the screen and prevents the left and right field inversion by correcting the position value of the image when the program is moved or scrolled.

A programming example of that implementation is shown below. This is the case of the window environment and the example using visual C ++.

Example 1) Still Image

int i; //One

if (m_rect.top% == 2) // 2

i = 0; // 3

else // 4

i = 1; // 5

StretchBlt (MemDC, // 6

0, i, // 7

m_width, m_height, // 8

PMemDC, // 9

0, 0, // 10

m_width, m_height / 11

SRCCOPY); // 12

In the case of a still image, it is determined whether the position is right before the image is spread on the screen (1 to 4 rows), and if the position is not in the correct position, the value of i is corrected.

Example 2) In case of video

After determining the location where the image data of each frame of the video is to be scattered, determine whether the location is corrected, and if the location is wrong, add 1 to correct the location.

if (m_pMvRect.top% 2 == 1) // Conditional statement to fit OL

{

// change MovieActive coordinate to fit OL

m_MovieControl.MoveWindow (0,1,

m_pMvRect.right-m_pMvRect.left,

m_pMvRect.bottom-m_pMvRect.top,

TRUE);

}

else

{

// change MovieActive coordinate to fit OL

m_MovieControl.MoveWindow (0,0,

m_pMvRect.right-m_pMvRect.left,

m_pMvRect.bottom-m_pMvRect.top,

TRUE);

}

The present invention prevents reversal of left and right images when implementing interlaced stereoscopic images on a PC, thereby providing an even stereoscopic image at all times.

Claims (1)

When implementing interlaced stereoscopic images on a computer monitor A method for displaying stereoscopic images synthesized in an interlaced manner on a monitor to prevent inversion of left and right images and a computer ROM that performs left and right inversion prevention functions.