High grade edge self adaption interpolation method and system for interleave to inching change

Abstract

An improved method and system for edge adaptive interpolation. The method uses a "9x2" window to detect the edge direction with post-processing to remove any artifacts due to the possible false edge detection, and a hierarchical scheme is employed to reduce the computation required. The method detects if there is edge existing along the current pixel. If there is no edge, then the edge detection output will be 90 degrees (the interpolation will be performed along the vertical direction). If an edge does exist, the method determines whether the edge direction falls within a first or second direction group. Once the edge direction is assigned to a particular group (e.g., 0-90 degrees or 90-180 degrees), the edge direction will be detected among five (5) possible directions. To further improve the edge detection precision, and also to remove the possibility of false edge direction detection, a post-processing technique may be applied to the edge direction signal. After the edge signal post-processing, the edge direction information is then passed to an edge adaptive interpolation block to perform the interpolation along the edge direction detected. Still another post-processing technique may be applied to the edge adaptive interpolated signal to further remove the possible noise due to an incorrect edge direction detection.

Description

technical field [0001] The present invention relates generally to image processing methods and systems, and more particularly to an advanced edge-adaptive interpolation method and system for interlaced-to-progressive conversion, which can be used to improve the resolution of aberrant images. Background technique [0002] Interlacing schemes have been widely adopted in current display monitoring systems, including television systems. In a typical interlaced system, the sequence of video fields alternates between odd fields (eg, fields containing odd lines) and even fields (eg, fields containing even lines). A conventional display monitor that receives a sequence of fields reproduces each video field in the sequence. Each field is shown on a display screen, such as a television. For example, odd fields are first displayed using odd scan lines, then even fields are displayed using even scan lines, and so on. [0003] This interlaced scanning system has many drawbacks such as...

AI Technical Summary

Problems solved by technology

However, even though these improved methods perform detection around a single pixel or point, they do not effectively utilize neighborhood information that can increase the accuracy of the detection process.

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