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EP0751674A2
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Image reproducing method and apparatus
Assignee: Fujifilm Holdings Corp
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Filing: 1996-06-28
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Granted: —
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Expires: 2016-06-28
Abstract
Abstract In a method for reproducing a visible image from a digital image signal representing a color image, the digital image signal being made up of a series of image signal components, an unsharp image signal, which represents an unsharp image of the color image, is formed. The image signal components of the digital image signal and the unsharp image signal, which image signal components represent corresponding picture elements in the color image and the unsharp image, are then subtracted from each other, and a difference signal is thereby obtained. Predetermined image processing is carried out on the difference signal, and a processed image signal is thereby obtained. A visible image is reproduced from the processed image signal.
Inventors
- 👤 Kazuo Fuji Photo Film Co. Ltd. Shiota
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-10 00:57
CPC Classifications
H; H04; H04N; H04N1/00; H04N1/40; H04N1/409; H04N1/4092; H04N1/407; H04N1/4072
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
123 words
An image reproducing method, wherein a visible image is reproduced from a digital image signal representing a color image, the digital image signal being made up of a series of image signal components, the method comprising the steps of: i) forming an unsharp image signal, which represents an unsharp image of the color image, ii) subtracting the image signal components of the digital image signal and said unsharp image signal from each other, which image signal components represent corresponding picture elements in the color image and said unsharp image, a difference signal being thereby obtained, iii) carrying out predetermined image processing on said difference signal, a processed image signal being thereby obtained, and iv) reproducing a visible image from said processed image signal.
Claim 2
Dependent Claim
31 words
A method as defined in Claim 1 wherein the digital image signal is converted into a brightness signal, and said unsharp image signal is formed in accordance with said brightness signal.
Claim 3
Dependent Claim
36 words
A method as defined in Claim 1 wherein said unsharp image signal is formed by photoelectrically reading out a projected image of the color image, which projected image is obtained by optically blurring the color image.
Claim 4
Dependent Claim
56 words
A method as defined in Claim 1 wherein said unsharp image signal is formed by forming an unsharp signal of a thinned-out signal, in which the digital image signal has been thinned out at predetermined intervals, and interpolating signal components, which correspond to picture elements having been eliminated in the thinning-out operation, from said unsharp signal.
Claim 5
Dependent Claim
141 words
An image reproducing apparatus, wherein a visible image is reproduced from a digital image signal representing a color image, the digital image signal being made up of a series of image signal components, the apparatus comprising: i) an unsharp image signal forming means for forming an unsharp image signal, which represents an unsharp image of the color image, ii) a subtraction means for subtracting the image signal components of the digital image signal and said unsharp image signal from each other, which image signal components represent corresponding picture elements in the color image and said unsharp image, a difference signal being thereby obtained, iii) an image processing means for carrying out predetermined image processing on said difference signal, a processed image signal being thereby obtained, and iv) an image reproducing means for reproducing a visible image from said processed image signal.
Claim 6
Dependent Claim
43 words
An apparatus as defined in Claim 5 wherein said unsharp image signal forming means comprises a conversion means for converting the digital image signal into a brightness signal, and a means for forming said unsharp image signal in accordance with said brightness signal.
Claim 7
Dependent Claim
45 words
An apparatus as defined in Claim 5 wherein said unsharp image signal forming means comprises a means for forming said unsharp image signal by photoelectrically reading out a projected image of the color image, which projected image is obtained by optically blurring the color image.
Claim 8
Dependent Claim
70 words
An apparatus as defined in Claim 5 wherein said unsharp image signal forming means comprises a means for forming an unsharp signal from a thinned-out signal, in which the digital image signal has been thinned out at predetermined intervals, and an interpolating operation means for forming said unsharp image signal by interpolating signal components, which correspond to picture elements having been eliminated in the thinning-out operation, from said unsharp signal.
References Cited (Backward Citations)
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