Hitachi, Ltd.

Hitachi Industry & Control Solutions, Ltd.

Akira Irinouchi

Hirotomo Sai

Haruhiko Miyao

Makoto Asuka

Shinichi Nonaka

Defective pixels are to be selected so as not to cause image degradation. A defective pixel correction unitin an image processing apparatusobtains an imaging signal afrom an imaging sensorvia a gain adjustment unitand calculates an absolute value for the pixel value difference between a pixel to be tested for a defect of the imaging sensorand each of its surrounding pixels, respectively. Next, the defective pixel correction unitcompares 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 ain an image transition detection unit

Image processing apparatus and image processing method

An imaging device includes an imaging unit having an imaging element to conduct photoelectric conversion on incident light from a subject and output an electric signal, a signal gain control unit for controlling an output signal level of the imaging unit, a plurality of defective pixel correction units for correcting defective pixels contained in a signal output from the signal gain control unit, an image signal processing unit for generating an image signal from a signal which is output from the defective pixel correction units, a temperature measurement unit for measuring temperature in the vicinity of the imaging element, and a system control unit for generally controlling the imaging unit, the signal gain control unit, the correction units, and the image signal processing unit. The system control unit uses the plurality of defective pixel correction units jointly and causes them to operate according to occurrence causes of defective pixels.

Imaging device

An image pickup device and image pickup method are disclosed, wherein an image is picked up by changing the shutter speed in accordance with the illuminance of an object in the case where the rate at which the object moves in the whole image is smaller than a predetermined value, and an image is picked up without changing the shutter speed regardless of the illuminance of the object in the case where the rate at which the object moves in the whole image is not smaller than the predetermined value.

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Hitachinaka, Japan

Akira Irinouchi