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US 8,009,338 B2Granted
Image processing apparatus
AssigneeMurata Machinery, Ltd.
InventorKenji Dokuni
Life of this patent
Estimating the term…
Abstract
An image processing apparatus that reduces a color of a document image to be printed. An image generation unit scans a document to generate image data. A hue determination unit determines a specific hue included in the image data and a hue becoming a complementary color of the specific hue. A color reduction unit reduces a color of the image data based on the specific hue and the hue becoming the complementary color of the specific hue. An output unit outputs the image data whose color is reduced on a recording medium. Image data that is of a hue in a predetermined range from the hue becoming the complementary color is replaced with the hue becoming the complementary color, and image data that is outside of the predetermined range is replaced with the specific hue.
Claims18
An image processing apparatus comprising:
- an image generation unit that scans a document to generate image data;
- a hue determination unit that determines a specific hue included in the image data and a hue becoming a complementary color of the specific hue;
- a color reduction unit that retains the specific hue and the hue becoming the complementary color to reduce a color of the image data;
- and
- an output unit that outputs the image data whose color is reduced by the color reduction unit, wherein
- the color reduction unit replaces image data that is of a hue in a predetermined range of angles α on both sides of the complementary color hue with the complementary color hue, and
- the color reduction unit replaces image data that is of a hue outside of the predetermined range with the specific hue.
4 more elements
An image processing apparatus comprising:
- an image generation unit that scans a document to generate image data;
- a hue determination unit that determines a specific hue included in the image data and a hue becoming a complementary color of the specific hue;
- a color reduction unit that retains the specific hue and the hue becoming the complementary color to reduce a color of the image data;
- and
- an output unit that outputs the image data whose color is reduced by the color reduction unit, wherein
- the color reduction unit replaces image data that is of a hue in a predetermined first range of angles β on both sides of the specific hue with the specific hue,
- the color reduction unit replaces image data that is of a hue in a predetermined second range of angles α on both sides of the complementary color hue with the complementary color hue, and
- chroma saturation of image data that is of a hue outside of the predetermined first and second ranges is set to be zero.
5 more elements
An image processing apparatus comprising:
- an image generation unit that scans a document to generate image data;
- a hue determination unit that determines a specific hue included in the image data and a hue becoming a complementary color of the specific hue;
- a color reduction unit that retains the specific hue and the hue becoming the complementary color to reduce a color of the image data;
- and
- an output unit that outputs the image data whose color is reduced by the color reduction unit,
- wherein the hue determination unit sets a hue having a highest chroma saturation of hues included in the image data to be the specific hue.
3 more elements
An image processing apparatus comprising:
- an image generation unit that scans a document to generate image data;
- a hue determination unit that determines a specific hue included in the image data and a hue becoming a complementary color of the specific hue;
- a color reduction unit that retains the specific hue and the hue becoming the complementary color to reduce a color of the image data;
- and
- an output unit that outputs the image data whose color is reduced by the color reduction unit,
- wherein the hue determination unit sets a hue having a highest appearance frequency in hues included in the image data to be the specific hue.
3 more elements
An image processing apparatus comprising:
- an image generation unit that scans a document to generate image data;
- a hue determination unit that determines a specific hue included in the image data and a hue becoming a complementary color of the specific hue;
- a color reduction unit that retains the specific hue and the hue becoming the complementary color to reduce a color of the image data;
- an output unit that outputs the image data whose color is reduced by the color reduction unit;
- and
- an input accepting unit that accepts an input operation from the outside,
- wherein the hue determination unit determines the specific hue based on the input operation accepted by the input accepting unit, and the hue determination unit determines the hue becoming the complementary color based on the determined specific hue.
4 more elements
An image processing method comprising the steps of:
- scanning a document to generate image data;
- determining a specific hue included in the image data and a hue becoming a complementary color of the specific hue;
- retaining the specific hue and the hue becoming the complementary color to reduce a color of the image data;
- and
- outputting the color-reduced image data, wherein
- image data that is of a hue in a predetermined range of angles α on both sides of the complementary color hue is replaced with the complementary color hue, and
- image data that is of a hue outside of the predetermined range is replaced with the specific hue.
4 more elements
An image processing method comprising the steps of:
- scanning a document to generate image data;
- determining a specific hue included in the image data and a hue becoming a complementary color of the specific hue;
- retaining the specific hue and the hue becoming the complementary color to reduce a color of the image data;
- and
- outputting the color-reduced image data, wherein
- image data that is of a hue in a predetermined first range of angles β on both sides of the specific hue is replaced with the specific hue,
- image data that is of a hue in a predetermined second range of angles α on both sides of the complementary color hue is replaced with the complementary color hue, and
- chroma saturation of image data that is of a hue outside of the predetermined first and second ranges is set to be zero.
5 more elements
An image processing method comprising the steps of:
- scanning a document to generate image data;
- determining a specific hue included in the image data and a hue becoming a complementary color of the specific hue;
- retaining the specific hue and the hue becoming the complementary color to reduce a color of the image data;
- and
- outputting the color-reduced image data,
- wherein a hue having a highest chroma saturation of hues included in the image data is set to be the specific hue.
3 more elements
An image processing method comprising the steps of:
- scanning a document to generate image data;
- determining a specific hue included in the image data and a hue becoming a complementary color of the specific hue;
- retaining the specific hue and the hue becoming the complementary color to reduce a color of the image data;
- and
- outputting the color-reduced image data,
- wherein a hue having a highest appearance frequency in hues included in the image data is set to be the specific hue.
3 more elements
An image processing method comprising the steps of:
- scanning a document to generate image data;
- determining a specific hue included in the image data and a hue becoming a complementary color of the specific hue;
- retaining the specific hue and the hue becoming the complementary color to reduce a color of the image data;
- outputting the color-reduced image data;
- and
- accepting an input operation from the outside,
- wherein the specific hue is determined based on the accepted input operation, and the hue becoming the complementary color is determined based on the determined specific hue.
4 more elements
Dependencies are inferred from the claim text.