Image processing apparatus, image processing method, and image processing program
First Claim
Patent Images
1. An image processing apparatus comprising:
- an image data obtaining unit that obtains image data;
a sampling unit that samples the image data;
a statistic value determining unit that determines a statistic value based on statistic information in a histogram with respect to a grayscale value of image data that is obtained by performing rough quantization and linear interpolation on the sampled image data;
a correction-amount determining unit that determines a correction amount to be used for image processing based on the statistic value; and
an image processing unit that performs the image processing according to the correction amount.
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Abstract
An image processing apparatus includes the following elements. An image data obtaining unit obtains image data. A sampling unit samples the image data. A statistic value determining unit determines a statistic value based on statistic information in a histogram with respect to a grayscale value of image data that is obtained by performing rough quantization and linear interpolation on the sampled image data. A correction-amount determining unit determines a correction amount to be used for image processing based on the statistic value. An image processing unit performs the image processing according to the correction amount.
50 Citations
6 Claims
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1. An image processing apparatus comprising:
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an image data obtaining unit that obtains image data;
a sampling unit that samples the image data;
a statistic value determining unit that determines a statistic value based on statistic information in a histogram with respect to a grayscale value of image data that is obtained by performing rough quantization and linear interpolation on the sampled image data;
a correction-amount determining unit that determines a correction amount to be used for image processing based on the statistic value; and
an image processing unit that performs the image processing according to the correction amount. - View Dependent Claims (2, 3, 4)
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5. An image processing method comprising:
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obtaining image data;
sampling the image data;
determining a statistic value based on statistic information in a histogram with respect to a grayscale value of image data that is obtained by performing rough quantization and linear interpolation on the sampled image data;
determining a correction amount to be used for image processing based on the statistic value; and
performing the image processing according to the correction amount.
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6. An image processing program executed by an image processing apparatus including a control circuit to cause the image processing apparatus to function as:
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an image data obtaining unit that obtains image data;
a sampling unit that samples the image data;
a statistic value determining unit that determines a statistic value based on statistic information in a histogram with respect to a grayscale value of image data that is obtained by performing rough quantization and linear interpolation on the sampled image data;
a correction-amount determining unit that determines a correction amount to be used for image processing based on the statistic value; and
an image processing unit that performs the image processing according to the correction amount.
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Specification
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Current AssigneeSeiko Epson Corporation (Seiko Group)
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Original AssigneeSeiko Epson Corporation (Seiko Group)
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InventorsKurumisawa, Takashi, Ishida, Masanori
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Application NumberUS11/300,395Publication NumberTime in Patent OfficeDaysField of SearchUS Class Current382/169CPC Class CodesH04N 1/4074 using histogramsH04N 1/62 Retouching, i.e. modificati...
