Motion self-adaptive de-interlacing method based on visual characteristics

Abstract

The invention provides a motion self-adaptive de-interlacing method based on visual characteristics, comprising the following steps of: (1) continuously storing five interlaced rows of videos, and joining a left point and a right point of each pixel point into motion detection to form an FIR (Finite Impulse Response) filter so as to obtain a motion detection value MV; (2) acquiring an interpolation coefficient alpha according to the motion detection value MV by adopting a dynamic double-threshold-value method; (3) acquiring an intra-field interpolation by adopting an edge difference value, and acquiring an inter-field interpolation by adopting an improved three-point median filtering method; (4) carrying out self-adaptive interpolation on a point to be interpolated according to the results of the interpolation coefficient alpha, the intra-field interpolation and the inter-field interpolation, and finally interlacing with existing lines of a current field to realize line-by-line output. According to the motion self-adaptive de-interlacing method provided with the invention, the low-pass FIR filter is added, and therefore, the motion loss inside a moving object is prevented and noises are effectively reduced; a double-threshold-value dynamic regulating method based on a brightness value is introduced according to the visual characteristics of human eyes, and therefore the subjective effect of de-interlacing is enhanced; and different inter-field interpolation methods are introduced for different pixel points, and therefore the interpolation accuracy of slowly moving pixels is enhanced.

Description

technical field [0001] The invention belongs to the technical field of video image processing, and in particular relates to a motion adaptive deinterlacing method based on visual characteristics by using intra-field interpolation and inter-field interpolation. Background technique [0002] Due to the lack of advanced technology in the early days, a lot of interlaced video technology was used, especially in television systems, the video frame was divided into two fields, and each field included interlaced scan lines. The current three major analog color TV systems PAL, NTSC and SECAM all use interlaced scanning. Digital TV, on the other hand, uses progressive scanning. [0003] At present, flat panel display technology has become the mainstream. Due to the disadvantages of interlaced scanning: flicker, picture jitter, edge jagged, etc., flat panel display technology basically adopts progressive scanning display devices, such as liquid crystal displays. When displaying inter...

AI Technical Summary

Problems solved by technology

[0005] At present, the above-mentioned de-interlacing algorithm basically does not consider human visual characteristics. In fact, the human eye is less sensitive to motion in areas with high and low brightness than areas with moderate brightness. Therefore, the pixels with higher and lower brightness Threshold should be smaller than moderately bright areas

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