Image processing
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Accused Products
Abstract
Noise adding unit 700 reads the downloaded target JPEG image from memory and adds designated noise to that JPEG image. Reverse DCT transformation unit 710 performs reverse discrete cosine transformation on the noise-added JPEG image, and transforms it from space frequency to spatial coordinates. Binarization unit 720 binarizes the image that has been expanded to spatial coordinates. This makes it possible to achieve the same processing as half-tone processing on images that have undergone normal orthogonal transformation without putting a large burden on the CPU, etc. and with a small data volume even when transferring via a communication path.
9 Citations
37 Claims
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1-8. -8. (canceled)
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9. An image processing apparatus that performs designated processes on a normal orthogonally transformed image, said image processing apparatus comprising:
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a noise adding unit configured to generate a designated noise based on a dither matrix and configured to add the designated noise to said image that has undergone said normal orthogonal transformation;
a reverse transformation unit configured to perform a reverse normal orthogonal transformation, which is a reverse transformation of said normal orthogonal transformation, on said noise-added image; and
a binarization unit configured to binarize said image, which has undergone said reverse normal orthogonal transformation, using a designated threshold value. - View Dependent Claims (10)
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11. An image processing apparatus that performs designated processing on an image for which high frequency components have been removed, said image processing apparatus comprising:
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a memory unit configured to store a predetermined designated noise;
a noise adding unit configured to receive the predetermined designated noise from the memory unit and configured to add the predetermined designated noise to the image with said high frequency components removed. - View Dependent Claims (32, 33)
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12. (canceled)
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13. An image processing system comprising:
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a sending device, and a receiving device, wherein said sending device includes, a first memory unit including a first computer program, a noise adding unit configured to add designated noise to an image, which has undergone normal orthogonal transformation, based on the first computer program, and a sending unit configured to send said image to which said noise has been added via a communication path, and wherein said receiving device includes, a second memory unit including a second computer program, a receiving unit configured to receive said sent image, and a reverse transformation unit configured to perform reverse normal orthogonal transformation on said received image based on the second computer program, the reverse normal orthogonal transformation being a reverse transformation of said normal orthogonal transformation. - View Dependent Claims (15, 16)
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14. (canceled)
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17-22. -22. (canceled)
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23. An image processing method for performing designated processing on a normal orthogonally transformed image, comprising:
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generating a designated noise based on a dither matrix;
adding the designated noise to said image that has undergone said normal orthogonal transformation;
performing reverse normal orthogonal transformation, which is a reverse transformation of said normal orthogonal transformation, on said image with said noise added; and
binarizing said image, which has undergone said reverse normal orthogonal transformation, using a designated threshold value. - View Dependent Claims (24)
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25-27. -27. (canceled)
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28. A computer program product that causes a computer to perform designated processes on a normal orthogonally transformed image, said computer program product comprising:
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a first program code that causes said computer to add non-random designated noise to said image that has undergone said normal orthogonal transformation;
a second program code that causes said computer to perform a reverse normal orthogonal transformation, which is a reverse transformation of said normal orthogonal transformation, on said noise-added image;
a third program code that causes said computer to binarize said image, which has undergone said reverse normal orthogonal transformation, using a designated threshold value; and
a computer readable medium, in which said first program code, said second program code, and said third program codes code are stored. - View Dependent Claims (34, 35)
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29. A computer readable medium comprising:
an area configured to store an image which is obtained by adding designated noise generated using a dither matrix to a normal orthogonally transformed image.
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30. (canceled)
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31. A data signal embodied in a carrier, said data signal representing a computer program that causes a computer to perform designated processes on a normal orthogonally transformed image, said data signal comprising:
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a first program code that causes said computer to add non-random designated noise to said image that has undergone said normal orthogonal transformation;
a second program code that causes said computer to perform a reverse normal orthogonal transformation, which is a reverse transformation of said normal orthogonal transformation, on said noise-added image; and
a third program code that causes said computer to binarize said image, which has undergone said reverse normal orthogonal transformation, using a designated threshold value. - View Dependent Claims (36, 37)
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Specification