Method for frame frequency doubling based on image profile matching

Abstract

The invention relates to a method for frame frequency doubling method based on image contour matching. The inventive method compares present frame with reference frame, and determines movement area and static area of present frame; edge detection of the movement area is performed to determine present contour of image in movement area; generating present block containing the contour according to determined present contour, matching search area of reference frame, and searching block similar to present block in search area by matching rule; executing interpolation by adopting frame repetition or black frame insertion; calculating image data of present block in interpolation frame; generating frame frequency doubling time sequence and outputting interpolation frame image data of present frame and then image data of present frame in a frame time according to time sequence. The invention processes 50 frame / second and 60frame / second non-interlaced signal based on image contour matching, provides better visual effect at 100Hz / 120 Hz liquid crystal screen, achieves goal for removing movement blurring.

Description

technical field [0001] The invention relates to a frame frequency doubling technology, in particular to a frame frequency doubling method based on image contour matching. Background technique [0002] The current TV signals are divided into 50Hz (50 fields per second) and 60Hz (60 fields per second), and an interlaced scanning method is adopted (each frame signal is composed of odd field and even field). [0003] LCD technology, as one of the representative technologies of flat-panel TVs, adopts progressive scanning technology. Therefore, the interlaced TV signal needs to go through de-interlace (De-interlace) technology to convert the 50 field / 60 field signal into 50 frame / 60 frame per second. [0004] LCD technology, compared to other flat-panel TVs, also has disadvantages. Its main disadvantage is that it will produce motion blur when displaying high-speed moving pictures. The reason for this phenomenon is that the response time of the liquid crystal is relatively low ...

AI Technical Summary

Problems solved by technology

[0015] In the patent document whose patent number is 200410032889.8 (frame interpolation method and device thereof during frame rate conversion), it is recorded "a frame interpolation method for processing repetitive or periodically repeated video during frame rate conversion and its device to avoid video quality degradation”

[0016] However, for more non-repetitive and non-periodically repeated video signals, such as object movement and linear motion in the image, when the frame rate is doubled, a clear interpolated image cannot be obtained.

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