Image processor
View Patent ↗Disclosed is an image processor that reduces or eliminates the effects of a flash band regardless of performing a shutter operation or not. An imaging device includes a flash band detector configured to determine whether each image of the consecutive images shown by image signals output from an imager is a flash band image a part of which is affected by a flash, and a flash band compensator configured to, if a first image is determined as the flash band image, generate a third image which is supposed where the third image is fully affected by a flash by using a second image which is not determined as the flash band image, and output the third image instead of the first image.
1. An image processor processing consecutive images, the image processor comprising:
circuitry configured to:
determine whether each image of the consecutive images is a flash band image having a part affected by a flash; and
if a first image of the consecutive images is determined as the flash band image,
generate a new third image which simulates being fully affected by the flash, wherein the new image is based on a second image of the consecutive images which is not affected by the flash, and
output the new image in place of the first image.
2. The image processor of claim 1 , wherein the circuitry has
a memory configured to record the second image of the consecutive images which is not affected by the flash, and
a generator configured to generate the new image by using the second image recorded in the memory.
3. The image processor of claim 1 , wherein
the circuitry generates the new image by at least multiplying a gain value by the second image or adding an offset value to the second image.
4. The image processor of claim 3 , wherein
at least one of the gain value or the offset value is variable depending on a pixel value of each pixel.
5. The image processor of claim 3 , wherein
at least one of the gain value or the offset value is variable depending on a degree of an effect of the flash.
6. The image processor of claim 1 , wherein
the circuitry generates the new image from the second image by using a lookup table.
7. The image processor of claim 1 , wherein
after the number of consecutive flash band images reaches a predetermined number, the circuitry further outputs consecutive flash band images without any change after compensating for the predetermined number of the consecutive flash band images.