Patent ID: 6075902
Filing Date: 2000-06-13
Classification: H04N

Abstract:
An area recognizing device for recognizing an edge area and a non-edge area of an image which is expressed by an N gradation level, said area recognizing device comprising:at least two edge detecting filters, each of which detects an edge component of a pixel in concern as referring to a plurality of pixels within an area including said pixel in concern and outputs an edge component value as a detecting result, wherein each of said edge detecting filters is placed to target a different pixel in said N-level gradation image as said pixel in concern;at least two comparing means, each of which corresponds to one of said edge detecting filters to have a one-to-one relation, compares said edge component value outputted from a corresponding edge detecting filter with a certain value, and judges said edge component value to be valid when said edge component value is equal to or greater than said certain value;an adding means for summing up each edge component value judged to be valid; anda judging means for judging a summed up result obtained from said adding means at a certain judgment level, and outputting a certain judgment result, wherein said edge area and said non-edge area of said N-level gradation image is recognized by said certain judgment result.