| 摘要 |
PURPOSE:To obtain an isolated black dot point eliminating device for an image reader or the like with a simple configuration independently of the resolution of the reader by selecting a set pixel area to be an area in question and counting black pixels in the area in question so as to discriminate black level isolating points. CONSTITUTION:Parameters are set by X1, X2, Y1, Y2 setting section 23 in advance depending on the resolution of a reader or the like. After image data being a sequential processing object are given to a matrix generating section 22 in this state, a black level data count section 24 counts number of black level pixels in the given area in a center of a matrix NXM decided by parameters X1, X2, Y1, Y2. Then all of lots of patterns whose number of black level pixels is 4 or below and rotated around a center pixel are discriminated to be isolated black dots by discriminating data whose number of black level pixels is, e.g. 4 or below to be isolated black dots as the result of count. Furthermore, in this case, number of matrix pixels in the area given is made variable. |
