Print Controller Gamma Adjustment Separation
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Solution Overview
Problem
Conventional print controllers face inefficiencies in throughput and color reproduction accuracy during reprinting due to repeated rasterizing processes and loss of tone information when gamma adjustment data changes, leading to resource consumption and reduced color accuracy.
Innovation Solution
An image processing system that includes a print controller and print engine, where the controller outputs new color adjustment data for gamma adjustments based on input data, and the engine performs gamma adjustments using stored color and correction data, allowing for efficient reprinting and improved color reproduction by avoiding redundant image data processing and preserving original tone information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the print controller performs rasterizing processing again when color adjustment data changes, then new color-adjusted image data can be generated, but throughput decreases and resource consumption increases
Solution Approach 1:
The patent separates the rasterizing function from the color adjustment function. The print controller performs rasterizing once to generate image data, then stores it. The print engine performs color adjustment separately using stored image data and color adjustment data, avoiding repeated rasterizing while maintaining color accuracy.
Solution Approach 2:
The patent implements preliminary rasterizing by the print controller before the print job is executed. The image data is generated in advance and stored, so when color adjustment data changes, only the color adjustment step needs to be repeated, not the entire rasterizing process, thus improving throughput.
2Manufacturing precision
If gamma adjustment is applied during rasterizing processing, then color adjustment can be performed, but original tone information is lost
Solution Approach 1:
The patent inverts the conventional order by having the print engine perform color adjustment on already-rasterized image data, rather than having the print controller apply color adjustment during rasterizing. This allows the original tone information to be preserved in the stored image data while still enabling accurate color adjustment when needed.
Solution Approach 2:
The patent extracts the color adjustment function from the rasterizing process. The print controller focuses only on rasterizing and storing image data, while the print engine handles color adjustment separately using stored color adjustment data, preventing loss of tone information.
3Productivity
If the print controller stores image data and color adjustment data separately, then reprinting efficiency can be improved, but device complexity increases
Solution Approach 1:
The patent uses copying by storing image data and color adjustment data separately in storage units. During reprinting, the print engine can efficiently retrieve and combine these stored copies without requiring the print controller to regenerate image data, improving reprinting efficiency while keeping the data management structure relatively simple.
Data Source
AI summary
Disclosed is an image processing system, comprising: an image processing apparatus to output image data based on an input of a print job; and an image forming apparatus to form an image based on the image data, wherein the image processing apparatus comprises a first control section to output color adjustment data so as to perform a gamma adjustment for the image data, and wherein the image forming apparatus comprises an adjustment section to perform the gamma adjustment for the image data based on the input color adjustment data.