Apparatus for and method of outputting image
First Claim
1. An apparatus for outputting an image by generating at least one of a print, a print proof, a printing plate, and a platemaking film directly from image data including at least one color element, comprising:
- preparing means for preparing a plurality of gradation conversion curves whose gradation characteristics are different stepwise from each other;
selecting means for selecting one of said gradation conversion curves with respect to at least one color element; and
gradation converting means for being supplied with image data, converting gradations of the supplied image data according to the selected gradation conversion curve, and outputting image data represented by the image data with the corrected gradations.
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Accused Products
Abstract
In a digital printing process employing a CTP device 14, hues can easily be changed in a process of generating printing plates without going back to a prior process. A plurality of gradation conversion curves whose gradation characteristics are different stepwise from each other, which are stored in a gradation conversion curve saving unit 22, are displayed on a display unit 36. The user selects a desired of the displayed gradation conversion curves with respect to at least one color element with a keyboard/mouse 34. The selected gradation conversion curve is set in an LUT converter 26. Input image data G can easily be converted into output image data Ga by converting the gradations of the input image data G according to the gradation conversion curve set in the LUT converter 26. The image data Ga is converted by a binarizing unit 30 into binary image data H, which is supplied to the CTP device 14. The CTP device 14 outputs printing plates each bearing a binary image represented by the binary image data H.
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Citations
28 Claims
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1. An apparatus for outputting an image by generating at least one of a print, a print proof, a printing plate, and a platemaking film directly from image data including at least one color element, comprising:
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preparing means for preparing a plurality of gradation conversion curves whose gradation characteristics are different stepwise from each other; selecting means for selecting one of said gradation conversion curves with respect to at least one color element; and gradation converting means for being supplied with image data, converting gradations of the supplied image data according to the selected gradation conversion curve, and outputting image data represented by the image data with the corrected gradations. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 17, 18)
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11. A method of outputting an image by generating at least one of a print, a print proof, a printing plate, and a platemaking film directly from image data including at least one color element, comprising the steps of:
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preparing a plurality of gradation conversion curves whose gradation characteristics are different stepwise from each other; selecting one of said gradation conversion curves with respect to at least one color element; and converting gradations of supplied image data according to the selected gradation conversion curve, and outputting image data represented by the image data with the corrected gradations. - View Dependent Claims (12, 13, 14, 15, 16)
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19. An apparatus for outputting an image by generating at least one of a print, a print proof, a printing plate, and a platemaking film directly from image data including at least one color element, comprising:
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a preparing unit preparing a plurality of gradation conversion curves whose gradation characteristics are different stepwise from each other; a selecting unit selecting one of said gradation conversion curves with respect to at least one color element; a gradation converting unit being supplied with image data, converting gradations of the supplied image data according to the selected gradation conversion curve; and an output device outputting image data represented by the image data with the corrected gradations. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26, 27, 28)
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Specification