公开(公告)号：US08988562B2

公开(公告)日：2015-03-24

申请号：US13683207

申请日：2012-11-21

申请人： Hitachi, Ltd.

发明人： Akira Irinouchi ,  Makoto Asuka

IPC分类号： H04N9/64 ,  H04N5/367 ,  H04N5/357

CPC分类号： H04N5/367 ,  H04N5/3572

摘要： Defective pixels are to be selected so as not to cause image degradation. A defective pixel correction unit 13 in an image processing apparatus 1 obtains an imaging signal a12 from an imaging sensor 16 via a gain adjustment unit 12, and calculates an absolute value for the pixel value difference between a pixel to be tested for a defect of the imaging sensor 16 and each of its surrounding pixels, respectively. Next, the defective pixel correction unit 13 compares the differential with a defective pixel determination threshold value and determines the pixel being tested as defective, if the differential is greater than the threshold value. It should be noted that the threshold value is changed according to the magnitude of an image transition, by detecting the image transition of a video signal a14 in an image transition detection unit 15.

摘要翻译： 要选择不良像素，以免引起图像劣化。 图像处理装置1中的缺陷像素校正单元13经由增益调整单元12从成像传感器16获得成像信号a12，并且计算出被检测像素之间的像素值差异的绝对值 成像传感器16及其每个周围像素。 接下来，缺陷像素校正单元13将差分与缺陷像素确定阈值进行比较，并且如果差值大于阈值，则将被测试的像素确定为有缺陷。 应当注意，通过检测图像转换检测单元15中的视频信号a14的图像转变，阈值根据图像转变的大小而改变。