Image Forming Apparatus Color Conversion Preview Consistency
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Solution Overview
Problem
Image forming apparatuses that perform color conversion twice may display previews with some objects color-converted and others not, causing a strange appearance to users due to inconsistent processing.
Innovation Solution
The apparatus includes an obtainment unit for print data, a first image processing unit for converting color information of non-image attributes, a command execution unit for generating raster image data, a storage unit for storing the data, and a control unit that performs output only when a predetermined condition is met, ensuring consistent color conversion across all objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If color conversion is performed twice (first on non-image attributes, then on picture attributes), then color conversion completeness is improved, but preview consistency deteriorates because some objects are color-converted while others are not
Solution Approach 1:
The patent applies preliminary action by performing the first color conversion on non-image attributes (such as graphics and text) before generating the raster image data for preview display. This ensures that these objects are color-converted in advance, improving processing efficiency while maintaining preview consistency by controlling which objects undergo color conversion at each stage.
Solution Approach 2:
The patent applies local quality by differentiating the treatment of different object types: non-image attributes (graphics, text) receive color conversion processing while picture attributes maintain their original color information for preview purposes. This selective approach ensures that each object type is processed according to its specific requirements, resolving the contradiction between conversion completeness and preview consistency.
2Manufacturing precision
If color conversion is performed on all objects, then color conversion completeness is improved, but processing time increases due to double conversion requirements
Solution Approach 1:
The patent performs color conversion on non-image attributes as a preliminary action before raster image generation, rather than performing conversion twice on all objects. This approach ensures that graphics and text are properly color-converted while picture attributes skip the conversion process, significantly reducing total processing time while maintaining complete color conversion where needed.
Solution Approach 2:
The patent applies partial action by selectively performing color conversion only on non-image attributes (graphics, text) that require it, while excluding picture attributes from conversion. This partial approach avoids the excessive processing time of converting all objects twice, while still achieving complete color conversion for the objects that actually need it.
Data Source
AI summary
Provided is an image forming apparatus including: an obtainment unit configured to obtain print data including drawing commands; a first image processing unit configured to perform conversion of color information for drawing an object having a non-image attribute among objects to be drawn by the drawing commands; a command execution unit configured to generate raster image data based on the drawing commands; a storage configured to store the generated raster image data to perform predetermined output; a second image processing unit configured to perform conversion of color information on an object having a picture attribute in the generated raster image data; and a control unit configured to perform the predetermined output in a case where a predetermined condition is met.