US 8,526,500 B2 · System and method for global inter-frame motion detection in video sequences

Abstract

Methods and systems for detecting and compensating for motion depicted in a sequence of frames are disclosed. One example method includes converting video frames to monochrome. Conversion of an image to monochrome includes sampling luminance data of a portion of pixels in the image to identify the image as being of a particular image type, selecting a bit plane of the image based on the identified image type, and converting the image to a monochrome image using the selected bit plane. After conversion of video frames to monochrome, a pixel subset in a monochrome image corresponding to a first frame is compared to candidate matching pixel subsets within a search area of a monochrome image corresponding to a second, consecutive frame. The frames are processed to compensate for perceived motion blur based on the detected inter-frame motion.

Claims15

Dependent claims

A method for estimating global inter-frame motion between two video frames in a digital video sequence, comprising:

comparing luminance data of a reference pixel subset of a first one of the video frames to luminance data of candidate pixel subsets within a search area in a second one of the video frames to determine a preliminary matching pixel subset from the candidate pixel subsets;
determining an actual matching pixel subset from the other video frame based on a location of the preliminary matching pixel subset relative to said search area;
calculating a global inter-frame motion vector characterizing global inter-frame motion based on a location of the actual matching pixel subset;
checking the reliability of the actual matching pixel subset;
and
only calculating the global motion vector if the actual matching pixel subset is deemed to be reliable;
wherein reliability of the actual matching pixel subset is based on at least one of a sum of absolute difference error calculated for the actual matching pixel subset and a ratio of a minimum to average sum of absolute difference error.

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Dependencies are inferred from the claim text.

System and method for global inter-frame motion detection in video sequences

Life of this patent

System and method for global inter-frame motion detection in video sequences

Life of this patent

Abstract

Claims15