Image display apparatus, image display method and computer-readable recording medium storing image display program
AssigneeSeiko Epson Corporation
InventorShohei Yoshida
Life of this patent
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Abstract
An image display apparatus in which image signals of a plurality of primary colors are transformed by an image processing section into color space that includes lightness and chromaticity. When the chromaticity (color vividness) in this color space is being corrected, the correction method is changed in accordance with the optical modulation state of the display apparatus. If optical modulation is performed, then correction is made to lower the chromaticity, while correction is made to raise the chromaticity when there is no optical modulation.
Claims6
An image display apparatus that adjusts a displayed image by changing a flux of light, comprising:
- an image signal transformation device that transforms brightness level of image signals of a plurality of primary colors of a displayed image into color space that includes chromaticity and lightness;
- a correction device that corrects chromaticity in the color space;
- an expansion device that expands lightness in color space that has been transformed by the image signal transformation device;
- and
- a color space transformation device that transforms color space that includes a color value expanded by the expansion device and the corrected chromaticity into image signals of a plurality of primary colors.
An image display apparatus that adjusts a displayed image by changing a flux of light, comprising a correction device that performs correction of chromaticity and expansion of brightness level of image signals based on a predetermined calculation formula for each image signal of a plurality of primary colors of a displayed image.
An image display method that adjusts a displayed image by changing a flux of light, comprising:
- a first step of transforming image signals of a plurality of primary colors of a displayed image into color space that includes chromaticity and lightness;
- a second step of correcting chromaticity in the color space;
- a third step of expanding lightness in color space that has been transformed in the first step;
- and
- a fourth step of transforming color space that includes a lightness expanded in the third step and the corrected chromaticity into image signals of a plurality of primary colors.
An image display method that adjusts a displayed image by changing a flux of light, comprising the step of correcting expansion and chromaticity on image signals based on a predetermined calculation formula for respective image signals of a plurality of primary colors of a displayed image.
A computer-readable recording medium storing an image display program for adjusting a displayed image by changing a flux of light, the program executable on a computer and performing:
- an image signal transformation function that transforms image signals of a plurality of primary colors of a displayed image into color space that includes chromaticity and lightness;
- a correction function that corrects chromaticity in the color space;
- an expansion function that expands lightness in color space that has been transformed by the image signal transformation function;
- and
- a color space transformation function that transforms color space that includes a lightness expanded by the expansion function and the corrected chromaticity into image signals of a plurality of primary colors.
A computer-readable recording medium storing an image display program for adjusting a displayed image by changing a flux of light, the program executable on a computer and performing:
- a correction function that performs expansion and chromaticity correction on image signals based on a predetermined calculation formula for respective image signals of a plurality of primary colors of a displayed image.
Dependencies are inferred from the claim text.