Patent ID: 7391930
Filing Date: 2008-06-24
Classification: G06K

Abstract:
1. 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; wherein the first accumulator circuit includes: an adder to accumulate the first offset and output the first accumulation results; a delay circuit to receive the first accumulation results from the adder and feed the first accumulation results back to the adder according to a control signal; a buffer to receive the first accumulation results from the delay circuit and output the first accumulation results into the image processing system according to the control signal.