Diagonal Pixel Offset Image Pickup Device Correcting Modulation Depth
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional image pickup devices face challenges in enhancing diagonal contour and modulation depth, particularly in diagonal directions, due to reduced resolution and modulation depth during diagonal interpolations, which affects image quality.
Innovation Solution
A four-plate camera system with red, green, and blue image pickup elements performing diagonal pixel offset, generating and adding diagonal contour correction signals from specific pixel combinations, and using a screen position control unit to calculate correction amounts based on distance from the screen center, thereby improving diagonal contour correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If diagonal pixel offset is performed with two green image pickup elements, then color resolution is improved, but modulation depth in diagonal direction is reduced
Solution Approach 1:
A contour correction signal is introduced as an intermediary element to mediate between the diagonal pixel offset structure and the final image output. This correction signal, generated from neighboring pixel data, compensates for the modulation depth reduction caused by diagonal interpolation, allowing the system to maintain both color resolution improvement and adequate modulation depth
Solution Approach 2:
The system changes the parameter of pixel arrangement by implementing diagonal pixel offset specifically for green image pickup elements. This parameter change enables better color resolution by allowing more precise color sampling, while the accompanying contour correction mechanism compensates for the resulting modulation depth reduction
2Measurement precision
If diagonal interpolation is used to increase pixel density, then resolution is improved, but modulation depth and signal quality deteriorate
Solution Approach 1:
The contour correction signal serves as a mediator that bridges the gap between interpolated pixel data and high-quality output. By calculating correction values from reliable neighboring pixels and adding them to the interpolated signal, the system maintains signal quality while achieving improved resolution through diagonal interpolation
Solution Approach 2:
The system implements a feedback mechanism where contour correction signals are generated based on the actual pixel data from surrounding areas. This feedback loop allows the system to detect and correct deviations in the interpolated signal, ensuring that resolution enhancement does not come at the cost of signal quality
Data Source
AI summary
The purpose of the present invention is to correct the reduced degree of modulation in a diagonal direction in a four-plate camera having a frame memory and R, G1, G2, and B image pickup elements among which two green image pickup elements (G1, G2) shift pixels diagonally. This image pickup method is provided for an image pickup device having two green image pickup elements, a red image pickup element, and a blue image pickup element among which the two green image pickup elements shift pixels diagonally. The method includes, with respect to a contour correction target pixel, generating a diagonal contour correction signal from respective image signals of two diagonally upper left pixels, two diagonally upper right pixels, two diagonally lower left pixels, and two diagonally lower right pixels, and adding the diagonal contour correction signal to an image signal of the contour correction target pixel.