Angle de-skew device and method thereof
AssigneePrimax Electronics Ltd.
InventorsYu-Ting Shih, Ching-Lung Mao
Life of this patent
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Abstract
An angle de-skew device and the method thereof are used in an image processing system to rotate a skewed image with respect to a reference point as a rotated center. First and second accumulator circuits respectively are used to accumulate first and second offsets for the X coordinates and Y coordinates of the first pixel in the skewed image, and respectively output the sums into the image processing system. A counter is connected to the two accumulator circuits to control the number of accumulation times.
Claims8
An angle de-skew device used in an image processing system to rotate a skewed image according to a reference point as rotated center, comprising:
- a first accumulator circuit to accumulate X coordinate value of a first pixel of the skewed image by a first offset and to output one and upward first accumulation results into the image processing system;
- a second accumulator circuit to accumulate Y coordinate value of a first pixel of the skewed image by a second offset and to output one and upward second accumulation results into the image processing system;
- and
- a counter connected with the first and second accumulator circuit to control the number of accumulation times of the first and second accumulator circuits.
An angle de-skew method used in an image processing system to rotate a skewed image according to a reference point as a rotated center, comprising the steps of:
- accumulating a X coordinate value of a first pixel of the skewed image by a first offset and accumulating a Y coordinate value of a first pixel of the skewed image by a second offset;
- computing the number of accumulation times of the first and second offsets according to the angle that the skewed image is to be rotated;
- and
- outputting accumulation results in sequence to the image processing system, wherein the image processing system rotates the skewed image according to the accumulation results.
Dependencies are inferred from the claim text.