Panoramic Image Splicing Exposure Control Using Overlap Brightness
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Solution Overview
Problem
Panoramic image splicing is adversely affected by significant differences in scene brightness between images captured with different lenses, leading to uneven brightness and reduced image quality due to improper exposure parameters.
Innovation Solution
An image analyzing device adjusts exposure parameters by determining brightness ratios and differences across overlapping areas of multiple images, updating parameters to minimize brightness discrepancies, thereby improving splicing quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple images are captured with different lenses to create panoramic images, then the coverage area and field of view are improved, but significant differences in scene brightness between images cause uneven brightness in overlapping areas, deteriorating splicing quality
Solution Approach 1:
The patent adjusts exposure parameters (exposure time and gain) of different lenses based on brightness analysis of overlapping areas. By dynamically changing these parameters, the system equalizes brightness across images with different scene luminance, enabling high-quality splicing while maintaining wide panoramic coverage
Solution Approach 2:
The system performs preliminary brightness analysis on overlapping areas before final splicing. By pre-calculating brightness ratios and adjusting exposure parameters in advance, the system prevents brightness mismatches from occurring, ensuring uniform brightness distribution across all overlapping regions in the final panoramic image
2Productivity
If exposure parameters are not properly adjusted, then image capture speed is maintained, but the panoramic image develops splicing lines at splicing points due to uneven brightness, reducing overall image quality
Solution Approach 1:
The system implements a feedback mechanism where brightness values of overlapping areas are analyzed and used to adjust exposure parameters for subsequent image capture. This closed-loop control ensures that brightness consistency is maintained across all images while preserving rapid capture speed, preventing splicing lines from forming in the final panoramic image
Data Source
AI summary
A method for adjusting exposure parameters of images to be spliced and an image analyzing device are provided. The method includes: obtaining N images to be spliced into a panoramic image; obtaining a first brightness value of a first overlapping area and a second brightness value of a second overlapping area of each of the N images, and accordingly determining a first brightness ratio value and a second brightness ratio value of each of the N images; and determining a brightness ratio difference of each of the N images based on the first brightness ratio value and the second brightness ratio value of each of the N images, and accordingly updating an exposure parameter corresponding to each of the N images.