Image Capturing Device Dynamic Exposure Histogram Synthesis
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Solution Overview
Problem
Current image capturing devices struggle to produce high dynamic range images effectively due to limitations in processing capability, requiring multiple images with fixed exposure compensation, which often results in inadequate exposure selection and suboptimal image quality.
Innovation Solution
An image capturing device comprising an image capturing module, exposure module, and processing module that captures and analyzes scene images by generating histograms for different exposure conditions, calculating discrete values, and synthesizing temporary images in varying brightness conditions to produce high dynamic range images efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple images with fixed exposure compensation are used for synthesis, then high dynamic range image can be produced, but processing time increases and image quality may be suboptimal
Solution Approach 1:
The patent applies dynamics by making the exposure compensation values adaptive rather than fixed. The processing module dynamically selects exposure compensation values based on histogram analysis of the captured images. This allows the system to adjust the number and exposure parameters of images to be synthesized according to the actual brightness distribution in the scene, thereby reducing unnecessary processing while maintaining high dynamic range image quality.
2Adaptability or versatility
If general camera processing capability is used, then device complexity is limited, but inability to handle more than three images in short time results in insufficient exposure compensation selection
Solution Approach 1:
The patent applies preliminary action by performing histogram analysis and discrete value calculation on captured images before the actual synthesis process. The exposure module pre-calculates the brightness distribution and determines the optimal number of images and exposure compensation values needed. This preliminary analysis enables the camera to adaptively plan the synthesis process, improving exposure compensation selection without requiring excessive processing power during the actual synthesis.
Data Source
AI summary
An image capturing device and an image synthesis method thereof are disclosed. The image capturing device includes an image capturing module, an exposure module, and a processing module. The image capturing module captures a scene image corresponding to a scene. The exposure module meters the light of scene to generate a plurality of histograms. The processing module calculates a plurality of discrete values of the scene image in different exposure conditions according to the histograms. Further, based upon at least two highest discrete values, the processing module processes the scene image to generate at least two temporary images in at least two different brightness conditions, and synthesizes the temporary images to generate a high dynamic range image.