Abstract: A method and apparatus for reducing bloom in an output of a charge coupled device (CCD) image sensor is disclosed. The method includes the step of toggling at least two phases of said CCD after exposure of said CCD. The method and apparatus are particularly useful when a flash of light occurs during the exposure.

Abstract: A video camera includes a shading correction circuit in which a parabolic wave signal is generated and the level thereof is adjusted in accordance with zoom and iris settings of the camera's optical system. After adjustment, the parabolic wave signal is clipped in accordance with a reference level and the clipped parabolic wave signal is used for correcting the shading of the camera's image signal. The clipping of the parabolic correction signal allows for more accurate shading correction.

Abstract: A signal produced by a telecine suffers from losses and defects caused by differences in response to incident light between different areas of the screen area scanned. These differences may arise from burning of the screen, blemishes, dirt in the system, differences in grain size of phosphor particles, missing particles, and losses in the internal optical system of the machine. The invention divides the scanning area into a correction map and devises for each area a correction factor based on the response of that area to incident illumination. When a defect is detected, video data from an adjacent area is substituted. Correction factors are held in a look-up RAM and output to a multiplier where they are multiplied with video data. The video data input to the multiplier may be suppressed and a test pattern may be loaded into the multiplier.

Abstract: An improved electronic imaging device is provided that utilizes redundant sensor elements for defect compensation. In addition, the signal generated from the redundant sensor elements is used to improve the signal to noise response of the electronic imaging device. In an electronic color imaging device, the need for total redundancy of sensor elements is obviated by using a single luminance array of sensor elements to provide defect correction data for defective sensor elements located in red, green and blue arrays.

Abstract: A solid-state image sensing apparatus includes a solid state image sensing device having a characteristic that an output voltage thereof natural-logarithmically varies in accordance with light reception amount. An image sensing output signal is obtained with respect to each pixel when uniform light is irradiated to the solid-state image sensing device. The difference is then calculated between an image sensing output signal obtained with respect to each pixel in actual sensing and an image sensing output signal with respect to a pixel corresponding thereto which signal is stored, to form an image signal.

Abstract: A document scanner provides compensation for sensitivity nonuniformity that may exist between the individual sensor cells of the sensor array that is used to sense light reflected from a document being scanned. Compensated is provided for both dark (i.e. unilluminated) sensitivity variation and light (i.e. illuminated) sensitivity variation that may exist in the individual sensor cells of the sensor array.