JP2005167485A5 - - Google Patents

Claims (9)

An image quality degradation component caused by the diffractive optical element of an electronic image obtained by forming an image of a subject on the image sensor surface via an optical system including a diffractive optical element is converted into the electronic image. A luminance saturation pixel detection unit for detecting a position of a high luminance pixel whose luminance is equal to or higher than a certain value, and detecting a generation amount of the generated image quality degradation component based on the pixel detected by the luminance saturation pixel detection unit, or The image degradation component generation amount detection unit to be estimated, and the image degradation component generation amount detection unit that detects or estimates the image quality degradation component generated in the peripheral area of the pixel detected by the luminance saturation pixel detection unit. An image processing apparatus that performs correction using an image deterioration detection and correction unit that includes an image deterioration correction processing unit that removes or reduces the generated amount based on the generated amount. The image processing apparatus according to claim 1, wherein a constant value in pixels in which the luminance in the electronic image is equal to or higher than a predetermined value is a saturation luminance value of the image sensor. 3. The imaging characteristic data of an optical system including the diffractive optical element is used when detecting or estimating an image degradation component in the image degradation component generation amount detection unit. Image processing apparatus. A memory unit that holds imaging characteristic data of an optical system including the diffractive optical element, wherein the image deterioration detection correction unit accesses the memory unit and refers to the imaging characteristic data. Item 4. The image processing apparatus according to Item 3. With respect to an electronic image obtained through a means for forming an image of a subject on an image sensor via an optical system including a diffractive optical element, an image quality degradation component caused by the diffractive optical element is A luminance pixel detection step for detecting the position of a high-luminance pixel whose luminance is equal to or higher than a certain value in the image, and the generation amount of the generated image quality degradation component is detected or estimated based on the pixel detected by the luminance pixel detection step. Image degradation component generation amount detection step, and image quality degradation component generated in the peripheral area of the pixel detected by the luminance pixel detection step is detected or estimated by the image degradation component generation amount detection step. An image processing method , wherein correction is performed through an image deterioration correction processing step that is removed or reduced based on the amount. The image processing method according to claim 5, wherein a constant value in a pixel whose luminance in the electronic image is equal to or higher than a predetermined value is a saturation luminance value of the image sensor. The imaging characteristic data of an optical system including the diffractive optical element is used when detecting or estimating an image degradation component in the image degradation component generation amount detection step. Image processing method . 8. The image processing method according to claim 7, further comprising a step of accessing a memory unit holding the imaging characteristic data and referring to the imaging characteristic data. 5. An imaging unit having an optical system including a diffractive optical element and an imaging device that converts an image obtained by the optical system into an electrical signal, and processing and outputting an image signal obtained by the imaging unit. An image pickup apparatus comprising the image processing apparatus according to claim 1.