Method and system for black bar identification

摘要

Black bars are determined by lines of pixels. Steps include: for each line (or subset), determining standard deviation (or product value) and a difference value, product value being proportional to M·σ, where M is pixel values mean for the line, σ standard deviation of pixel values for the line, and the difference value a difference between the standard deviation (or product) value for the line and the standard deviation (or product) value for one of the lines adjacent to the line, and determining whether any of the lines satisfies the criterion that the difference value for the line exceeds a threshold but the difference value for each other one of the lines to be displayed nearer to a first edge of the image than is the line does not exceed the threshold. Other aspects are a system or device configured (e.g., programmed) to perform any embodiment of the method.

主权项

1. A method for identifying a boundary of at least one black bar in an image determined by lines of pixels, where the pixels determine the black bar and at least one non-black image region, and said black bar is between the non-black image region and an edge of the image, said method including steps of:
(a) for each line of at least a subset of the lines, determining a standard deviation value and a difference value, where the standard deviation value is indicative of the standard deviation of pixel values for the line, and the difference value is the absolute value of the difference between the standard deviation value for said line and the standard deviation value for one of the lines adjacent to said line; (b-1) determining whether any line of the at least a subset of the lines satisfies a criterion that its difference value exceeds a predetermined threshold but the difference value for each other line of the at least a subset of lines to be displayed nearer to a first edge of the image does not exceed the threshold; and (b-2) identifying one of the lines as a black bar boundary in response to the step of determining.