Macro uniformity correction for x-y separable non-uniform
First Claim
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1. A system for correcting raster data for spatial non-uniformities within an image, comprising:
- a sensor for detecting a plurality of the raster data as a function of respective positions within the image;
a processor, which receives the raster data from the sensor, for processing the raster data to correct the spatial non-uniformities in the image; and
a memory device for storing a set of tone reproduction curves, respective ones of the tone reproduction curves being accessed by the processor as a function of the positions of the raster data for generating respective correction values to compensate for the non-uniformities, the processor applying the correction values to the respective raster data for generating corrected raster data.
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Abstract
A method for rendering a raster output level determines an image position of a pixel of interest (POI) within an image. An intended raster output level, which corresponds to the POI, is received into a processing device. A final raster input level is determined as a function of the image position and the intended raster output level. The final input level and the image position are transmitted to an output device. An actual raster output level is rendered, via the output device, at a position on an output medium corresponding to the image position. The actual raster output level substantially matches the intended raster output level.
43 Citations
6 Claims
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1. A system for correcting raster data for spatial non-uniformities within an image, comprising:
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a sensor for detecting a plurality of the raster data as a function of respective positions within the image; a processor, which receives the raster data from the sensor, for processing the raster data to correct the spatial non-uniformities in the image; and a memory device for storing a set of tone reproduction curves, respective ones of the tone reproduction curves being accessed by the processor as a function of the positions of the raster data for generating respective correction values to compensate for the non-uniformities, the processor applying the correction values to the respective raster data for generating corrected raster data. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification