IMAGING DEVICE AND IMAGE PROCESSING METHOD

专利名称：IMAGING DEVICE AND IMAGE PROCESSING

METHOD

发明人：Yoshiki AGATA,Muneaki YAMAGUCHI申请号：US157367申请日：20160525

公开号：US20180205867A1公开日：20180719

专利附图：

摘要：In a method for determining upper and lower limit values for a targetbrightness when image contrast is extended, an upper and lower limit value searchprocessing unit establishes two adjacent areas in accordance with brightness of a

grayscale histogram, and, while scanning the positions of those areas, compares thefrequency of those areas to a threshold, and if one frequency value is greater than orequal to the threshold value and the other frequency value is lower than the threshold,performs upper and lower limit value search processing wherein a brightness value at theboundary of the two areas is determined as an upper or lower limit value. Thresholds forupper and lower limit value search start position and frequency are established based onthe shape of the grayscale histogram of an image to be processed. The shape of thegrayscale histogram is identified according to preset classifications.

申请人：HITACHI KOKUSAI ELECTRIC INC.

地址：Tokyo JP

国籍：JP

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