A sixteen tree method of data compression of bilevel image is described.Thismethod has high efficiency,no information loss during compression,and easy to realize.
This paper presents a new edge detector using 5 ~ 5 mask, which can reduce noise efficientlybut not increase the width of the detected edge which always happens in the case of using the 5×5 windowedge detector. B...This paper presents a new edge detector using 5 ~ 5 mask, which can reduce noise efficientlybut not increase the width of the detected edge which always happens in the case of using the 5×5 windowedge detector. Besides, in order to handle the problem that the contrast decreases in the dark regioncaused by underexposure, this detector uses a self-adjusting threshold, so that it can detect the edge in re-gions of different grey background correctly.展开更多
文摘A sixteen tree method of data compression of bilevel image is described.Thismethod has high efficiency,no information loss during compression,and easy to realize.
文摘This paper presents a new edge detector using 5 ~ 5 mask, which can reduce noise efficientlybut not increase the width of the detected edge which always happens in the case of using the 5×5 windowedge detector. Besides, in order to handle the problem that the contrast decreases in the dark regioncaused by underexposure, this detector uses a self-adjusting threshold, so that it can detect the edge in re-gions of different grey background correctly.