Image Processing Apparatus Background Adjustment Gamma Curve
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional image processing apparatuses require significant memory capacity to store gradation adjustment data for various adjustments, limiting the number of combination patterns and complicating the processing flow, while also struggling to perform sensitive background adjustments without causing show-through or background fogging.
Innovation Solution
An image processing apparatus that uses multiple background adjustment γ curves to perform sensitive background adjustments, allowing for duplex recording on both sides of recording paper without the need for filters to remove show-through, and automatically selects the appropriate γ curve based on input image data characteristics to prevent uniform smoothing of background lightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple combination patterns of adjustments are stored in the storage section, then the adaptability of the image processing apparatus is improved, but the memory capacity requirement increases significantly
Solution Approach 1:
The invention segments the gradation adjustment data into separate storage for individual adjustment types (density, contrast, background, color adjustments) rather than storing all possible combination patterns. The processing unit dynamically combines these segmented adjustment data as needed, reducing memory requirements while maintaining versatility.
Solution Approach 2:
The invention introduces dynamic combination of adjustment data based on actual processing needs. The processing unit selectively combines adjustment data from different types depending on the specific adjustment requirements, allowing the system to adapt to various combination patterns without pre-storing all possibilities in memory.
2Quantity of substance
If the number of combination patterns is limited to reduce memory capacity, then the memory capacity requirement is reduced, but the adaptability of the image processing apparatus deteriorates
Solution Approach 1:
By segmenting adjustment data into separate storage units for each adjustment type, the system can store only the necessary individual adjustment data rather than all possible combinations. This segmentation allows flexible combination during processing without requiring extensive pre-stored combination data.
Solution Approach 2:
The system dynamically selects and combines adjustment data based on actual processing requirements. The processing unit can create various combination patterns on-the-fly by combining individual adjustment data, providing adaptability without requiring extensive pre-stored combination patterns.
3Manufacturing precision
If background adjustment is performed with high sensitivity to achieve detailed background control, then the background adjustment precision is improved, but the complexity of the processing flow increases
Solution Approach 1:
The background adjustment gamma curve serves multiple functions: it performs background lightening, highlight enhancement, and show-through removal simultaneously. This multi-functionality achieves detailed background control without requiring separate processing steps, thereby reducing overall processing complexity.
Solution Approach 2:
The invention uses parameter changes in the gamma curve (specifically making the gradient greater than 1 in certain ranges) to achieve high sensitivity background adjustment. By adjusting the gamma curve parameters rather than using complex multi-step processing, the system achieves precise background control with simpler processing flow.
4Reliability
If filters are used to remove show-through, then the show-through removal effectiveness is improved, but the device complexity and processing time increase
Solution Approach 1:
The invention replaces the mechanical filter approach with a computational gamma curve-based background adjustment. By using parameter changes in the gamma curve (making gradient > 1), the system achieves show-through removal through mathematical processing rather than physical filters, reducing device complexity and processing time.
Data Source
AI summary
An image processing apparatus capable of duplex recording on two faces of recording paper on a basis of input image data, includes: a background adjustment section for performing a background adjustment on a basis of a plurality of background adjustment γ curves; a setting section for setting one background adjustment γ curve from the plurality of background adjustment γ curves; an image processing section for processing the input image data with the background adjustment γ curve set by the setting section; and an image output section for performing duplex recording control to the two faces of the recording paper on a basis of output image data to which the background adjustment is performed by the image processing section.