Deinterlacing of video sources via image feature edge detection

Details Deinterlacing of video sources via image feature edge detection Deinterlacing of video sources via image feature edge detection

2006-04-04

2006-04-04

Yenke, Brian P. (Department: 2614)

Television

Format conversion

Line doublers type

C348S452000, C348S458000, C348S625000, C348S630000, C382S263000, C382S266000

Reexamination Certificate

active

07023487

ABSTRACT:
An interlaced to progressive scan video converter which identifies object edges and directions, and calculates new pixel values based on the edge information. Source image data from a single video field is analyzed to detect object edges and the orientation of those edges. A 2-dimensional array of image elements surrounding each pixel location in the field is high-pass filtered along a number of different rotational vectors, and a null or minimum in the set of filtered data indicates a candidate object edge as well as the direction of that edge. A 2-dimensional array of edge candidates surrounding each pixel location is characterized to invalidate false edges by determining the number of similar and dissimilar edge orientations in the array, and then disqualifying locations which have too many dissimilar or too few similar surrounding edge candidates. The surviving edge candidates are then passed through multiple low-pass and smoothing filters to remove edge detection irregularities and spurious detections, yielding a final edge detection value for each source image pixel location. For pixel locations with a valid edge detection, new pixel data for the progressive output image is calculated by interpolating from source image pixels which are located along the detected edge orientation.

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