Image processing apparatus
AssigneeCanon Kabushiki Kaisha
InventorAkira Hirai
Life of this patent
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Abstract
A system for performing gain correction of the image of an object obtained by image capture. A first white image is obtained by image capture at a first time with no object present, and a second white image is obtained by image capture at a second time later than the first image, with no object present. The first and second white images are then compared to determine if they meet predetermined criteria. If the predetermined criteria is met, a third white image is provided based on the comparison of the first and second white images, and the image of the object obtained by image capture is gain corrected based on the third white image.
Claims37
An image processing apparatus comprising:
- a correction means for performing a correction process on an image of an object, obtained through image capturing, with a second correction image also obtained through image capturing;
- and
- a determination means for determining a fitness of the second correction image for the correction process,
- wherein the determining means determines the fitness of the second correction image for the correction process based on a result of a comparison of a first correction image obtained through image capturing and the second correction image.
An imaging device for capturing an image of an object with a ray transmitted through the object using an imaging means having a plurality of pixels, the imaging device comprising:
- a correction means for performing a correction process on an image of an object, obtained through image capturing, with a second correction image also obtained through image capturing;
- and
- a determination means for determining a fitness of the second correction image for the correction process,
- wherein the determining means determines the fitness of the second correction image for the correction process based on a result of a comparison of a first correction image obtained through image capturing and the second correction image.
An image processing system comprising a plurality of apparatuses which are adapted to mutually communicate, with at least one of the apparatuses comprising:
- a correction means for performing a correction process on an image of an object, obtained through image capturing, with a second correction image also obtained through image capturing;
- and
- a determination means for determining a fitness of the second correction image for the correction process,
- wherein the determining means determines the fitness of the second correction image for the correction process based on a result of a comparison of a first correction image obtained through image capturing and the second correction image.
An image processing method for an image processing apparatus, comprising:
- a step of performing a correction process on an image of an object, obtained through image capturing, with a second correction image also obtained through image capturing;
- and
- a step of determining a fitness of the second correction image for the correction process,
- wherein the determining step determines the fitness of the second correction image for the correction process based on a result of a comparison of a first correction image obtained through image capturing and the second correction image.
A processing software program for performing a function of an image processing apparatus performing a correction process on an image of an object, obtained through image capturing, with a second correction image also obtained through image capturing, the program comprising program code for a step of determining a fitness of the second correction image for the correction process,
- wherein the determining step determines the fitness of the second correction image for the correction process based on a result of a comparison of a first correction image obtained through image capturing and the second correction image.
A storage medium storing a processing software program for performing a function of an image processing apparatus having a function of performing a correction process on an image of an object, obtained through image capturing, with a second correction image also obtained through image capturing, the program comprising program code for a step of determining a fitness of the second correction image for the correction process,
- wherein the determining step determines the fitness of the second correction image for the correction process based on a result of a comparison of a first correction image obtained through image capturing and the second correction image.
An image processing method comprising:
- obtaining by image capture with no object present a first white image at a first time;
- obtaining by image capture with no object present a second white image at a second time which is later than the first time;
- comparing the first white image and the second white image to determine if a predetermined criteria is met;
- providing a third white image based on the comparison of the first white image and the second white image, if the predetermined criteria is met;
- obtaining by image capture an image of an object;
- and
- gain correcting the image of the object based on the third white image.
Dependencies are inferred from the claim text.