Image processing with reduced influence of image show-through by conversion processing into one of an achromatic color and a designated chromatic color
AssigneeCanon Kabushiki Kaisha
InventorMasato Kobayashi
Life of this patent
Estimating the term…
Abstract
An image processing apparatus comprises a reading unit configured to read an image of an original; a correction unit configured to correct, based on variance values acquired for a pixel, the pixel in a region where a show-through has occurred, in the image read by the reading unit; a designation unit configured to designate a chromatic color; and a conversion unit configured to convert a pixel included in an image including the pixel corrected by the correction unit into one of a chromatic color and an achromatic color designated by the designation unit.
Claims10
An image processing apparatus comprising:
- a user interface that designates a chromatic color;
- a scanner that scans an image of a document;
- and
- a controller or a circuit that specifies, from among pixels in the image scanned by the scanner, a pixel at which a show-through has occurred,
- wherein the controller or the circuit increases a luminance value of the specified pixel, and
- wherein the controller or the circuit converts, based on the increased luminance value, a color of the specified pixel into one of an achromatic color and the chromatic color designated by the user interface.
A method of controlling an image processing apparatus, the method comprising:
- designating a chromatic color;
- scanning an image of a document;
- specifying, from among pixels in the scanned image, a pixel at which a show-through has occurred;
- increasing a luminance value of the specified pixel;
- and
- converting, based on the increased luminance value, a color of the specified pixel into one of an achromatic color and the designated chromatic color.
A non-transitory computer-readable storage medium storing a computer program to cause a computer to execute steps in a method of controlling an image processing apparatus, the method comprising:
- designating a chromatic color;
- scanning an image of a document;
- specifying, from among pixels in the scanned image, a pixel at which a show-through has occurred;
- increasing a luminance value of the specified pixel;
- and
- converting, based on the increased luminance value, a color of the specified pixel into one of an achromatic color and the designated chromatic color.
An image processing apparatus comprising:
- a scanner that scans an image of a document;
- and
- a controller or a circuit that specifies, from among pixels in the image scanned by the scanner, a pixel at which a show-through has occurred,
- wherein the controller or the circuit increases a luminance value of the specified pixel, and
- wherein the controller or the circuit converts, based on the increased luminance value, a color of the specified pixel into one of an achromatic color and a predetermined chromatic color.
Dependencies are inferred from the claim text.