Image processing method, image processing apparatus and recording medium
AssigneeCanon Kabushiki Kaisha
InventorsManabu Yamazoe, Kentaro Yano, Tetsuya Suwa, Okinori Tsuchiya
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Abstract
An image processing method, an image processing system and a recording medium capable of reproducing images in colors which are close to those memorized by man including a process to create a histogram of an original image, a process to adequately locate a highlight point on the histogram by comparing peaks of the histogram and setting image processing conditions dependently on a shape of a selected peak.
Claims10
An image processing method having a plurality of highlight point detecting methods, comprising the steps of:
- selecting a highlight point depending on characteristics of an original image;
- and
- setting a color processing condition for the original image depending on the highlight point,
- wherein the original image includes a plurality of images, and wherein a highlight point detection, said selecting and said setting are executed independently for each of the plurality of images, and
- wherein a shadow point is detected by a shadow point detecting method which is preliminarily set regardless of the characteristics of the original image by the color processing condition, and
- wherein said color processing condition is set on the basis of the selected highlight point and the detected shadow point.
An image processing method comprising the steps of:
- obtaining a first highlight on the basis of a first histogram on the basis of a luminance signal;
- obtaining a second highlight on the basis of a second histogram on the basis of a signal indicating brightness including a blue signal to which a heavy weight is imparted;
- comparing said first highlight with said second highlight;
- setting a highlight having a smaller value as a highlight point to be used to correct an image;
- and
- correcting the image on the basis of said set highlight point.
An image processing apparatus having a plurality of highlight point detecting methods, comprising:
- selecting means for selecting a highlight point according to characteristics of an original image;
- and
- setting means for setting a color processing condition for said original image according to said highlight point,
- wherein the original image includes a plurality of images, and
- wherein a highlight point detection, the selecting and the setting are executed independently for each of the plurality of images, and
- wherein a shadow point is detected by a shadow point detecting method which is preliminarily set regardless of the characteristics of the original image by the color processing condition, and
- wherein said color processing condition is set on the basis of the selected highlight point and the detected shadow point.
A recording medium in which a program is stored, said program comprising the steps of:
- preparing a plurality of highlight point detecting methods;
- detecting a highlight point according to characteristics of an original image;
- and
- setting a color processing condition for the original image according to the highlight point,
- wherein the original image includes a plurality of images, and
- wherein a highlight point detection, said selecting and said setting are executed independently for each of the plurality of images, and
- wherein a shadow point is detected by a shadow point detecting method which is preliminarily set regardless of the characteristics of the original image by the color processing condition, and
- wherein said color processing condition is set on the basis of the selected highlight point and the detected shadow point.
Dependencies are inferred from the claim text.