| 摘要 |
PURPOSE:To prevent the occurrence of a notch without an abuse such as the thinning and the collapse of a fine line and to prevent the increase of code quantity at the time of compressing/encoding information quantity after binarization. CONSTITUTION:An contour judgement means 15 for detecting a part where the notch occurs is constituted of a means for obtaining a binary threshold from the density levels of plural picture element areas with an attentional picture element as a center, a means for binarizing the plural picture element areas by the threshold and a means for detecting whether the binary pattern is a specified pattern or not. Furthermore, a means 16 for selecting a slice level binarizing the attentional picture element by referring to adjacent binary data in vertical direction or lateral direction which are previously binarized by the signal sent from the means 15 is provided. |
