Image Adjustment Device Simultaneous Luminance Chrominance Control
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Solution Overview
Problem
Conventional image enhancement methods only adjust luminance, leading to loss of image saturation and blurs near pattern boundaries, failing to meet viewer requirements for both luminance and chrominance.
Innovation Solution
An image adjustment device and method that simultaneously adjusts luminance and chrominance by generating maximum, average, and minimum luminance signals, calculating contrast values, and using chrominance compensation to produce output signals that meet viewer requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If only luminance is adjusted using statistic histogram extracting device and luminance curve device, then image contrast is improved, but image saturation is lost and blurs occur near pattern boundaries
Solution Approach 1:
The patent combines luminance adjustment (through histogram extracting device and luminance curve device) with chrominance adjustment (through color compensating device) into a unified image processing system. This merging ensures that both luminance contrast enhancement and chrominance saturation preservation are achieved simultaneously, preventing the loss of image saturation that occurs when only luminance is adjusted.
Solution Approach 2:
The color compensating device acts as an intermediary that processes chrominance signals based on luminance distribution information. It receives input chrominance signals and adjusts them according to the luminance histogram and curve, thereby compensating for saturation loss and preventing blurs near pattern boundaries while maintaining the luminance contrast improvements.
2Device complexity
If conventional luminance adjustment methods are used, then processing complexity is reduced, but both luminance and chrominance viewer requirements cannot be met simultaneously
Solution Approach 1:
The color compensating device performs multiple functions: it adjusts chrominance saturation, prevents boundary blurs, and adapts to different luminance distributions. This multi-functionality allows the system to meet diverse viewer requirements for both luminance and chrominance without significantly increasing processing complexity, as the same device handles multiple adjustment tasks.
Data Source
AI summary
The present invention provides a device and an image adjustment method by simultaneously adjusting the luminance and the chrominance of an image. The device comprises a luminance analysis device, a contrast adjusting device, a luminance adjusting device, a chrominance compensation device and a luminance gain adjusting device. The method comprises steps of: generating a maximum input luminance signal, an average input luminance signal and a minimum input luminance signal according to an input luminance signal; generating a contrast value according to at least one of the maximum input luminance signal and the average input luminance signal; generating an input luminance offset according to the input luminance signal and the minimum input luminance signal; generating an output chrominance signal according to the contrast value and an input chrominance signal; and generating an output luminance signal according to the input luminance offset and the contrast value.