Multi-Picture Video Image Processing with Luminance Equalization
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Solution Overview
Problem
In videoconferencing systems, the integration of multi-picture video images from different conference halls often results in uneven luminance and color characteristics due to varying environmental conditions and equipment, leading to a suboptimal visual experience for participants.
Innovation Solution
The method involves obtaining image characteristics from sub-picture video images from multiple channels, calculating independent adjustment coefficients, and applying identical control parameters to equalize these images before forming a multi-picture video image, ensuring uniform luminance and chroma adjustments across all sub-pictures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If pictures from different conference halls are separately adjusted at the source terminal to optimize their individual effects, then each sub-picture achieves optimal local quality, but the luminance and color characteristics of various sub-pictures become starkly different when spliced into a multi-picture, deteriorating visual experience
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting luminance and chroma parameters of sub-pictures based on their individual characteristics. The system calculates adjustment coefficients for each sub-picture's luminance and chroma components, then applies these parameter transformations to achieve uniform visual effects across the multi-picture display, resolving the contradiction between local optimization and global uniformity
Solution Approach 2:
The patent implements equipotentiality by equalizing the luminance and color characteristics of all sub-pictures to a common reference level. Through calculating and applying adjustment coefficients, the system creates a uniform visual potential across different conference hall pictures, eliminating the stark differences that would otherwise deteriorate the overall visual experience
2Manufacturing precision
If output modes of display devices are uniformly adjusted to satisfy one sub-picture's effect, then that sub-picture achieves excellent visual experience, but the effects of other sub-pictures are affected and cannot all be satisfied
Solution Approach 1:
The patent applies segmentation by processing each sub-picture independently through separate adjustment coefficient calculations. Each sub-picture's luminance and chroma are adjusted individually based on its own characteristics, allowing each segment to achieve optimal visual quality without compromising others, thereby resolving the contradiction between satisfying one sub-picture and maintaining compatibility with others
Solution Approach 2:
The patent implements local quality by applying different adjustment coefficients to different sub-pictures based on their individual luminance and chroma characteristics. Each region (sub-picture) receives customized parameter adjustments tailored to its specific needs, enabling each to achieve excellent visual experience while maintaining overall multi-picture harmony
Data Source
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AI summary
The embodiments of the present invention provide a method and device relating to multi-picture video image processing, which solve the problem in related art of the deterioration of the vision experience of the conventioneer as the characteristics of each sub-picture can not be satisfied simultaneously. Said method includes: receiving the data code stream of the sub-picture video images from several channels; equalizing the effect of said sub-picture video images with control parameters respectively according to the image characteristics of the sub-picture video images; synthesizing said equalized sub-picture video images to a multi-picture video image. This invention can uniformly adjust each sub-picture video image to the effect with the same image characteristics, which enables the sub-picture video images exhibit the same picture characteristic when be displayed. The display of the multi-picture video image constituted by sub-picture video images achieves whole style harmony and the vision experience of the conventioneer is improved.