Dual Lens Image Capture with Exposure Adjustment
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Solution Overview
Problem
Digital zoom techniques in image capturing devices often decrease exposure time and increase light sensitivity, leading to noise and degraded image quality due to vibration reduction challenges.
Innovation Solution
The method involves using a first lens module with a larger view angle and a second lens module with a smaller view angle, adjusting exposure time and light sensitivity accordingly, extracting image features, and merging images to generate an output image with improved quality, while correcting for geometric correlations between the lenses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital zoom technique decreases exposure time and increases light sensitivity value, then vibration reduction effect is improved, but image quality deteriorates due to noise generation
Solution Approach 1:
The patent divides the image capturing process into two separate stages using two different lens modules: the first lens module captures a first image with longer exposure time and lower light sensitivity for stable baseline capture, while the second lens module captures a second image with shorter exposure time and higher light sensitivity for detail enhancement. This segmentation allows each module to optimize for its specific function without compromise
Solution Approach 2:
The patent merges the first image and the second image through image merging processing to generate the final output image. By combining the stable baseline information from the first image with the detailed information from the second image, the system achieves both vibration reduction and high image quality in the final result
2Productivity
If exposure time is decreased and light sensitivity value is increased, then capturing speed is improved, but noise in images increases
Solution Approach 1:
The patent segments the image capturing function across two different lens modules with different exposure time and light sensitivity settings. The first lens module uses longer exposure time for noise-free capture, while the second lens module uses shorter exposure time for rapid detail capture, allowing the system to achieve both high capturing speed and high image quality through subsequent image merging
3Manufacturing precision
If exposure time is increased and light sensitivity value is reduced, then image quality is improved, but vibration reduction effect deteriorates
Solution Approach 1:
The patent assigns different exposure parameters to two separate lens modules: the first lens module captures with longer exposure time and lower light sensitivity to achieve high image quality with minimal noise, while the second lens module captures with shorter exposure time to freeze motion and reduce vibration effects. The combination of these two segmented captures produces the final optimized image
Data Source
AI summary
The present invention discloses a method of capturing images and an image capturing device using the method. The image capturing device has a first lens module and a second lens module having a view angle which is smaller than that of the first lens module. The method comprises: increasing an exposure time and reducing a light sensitivity value of the first lens module and capturing a first image by using the first lens module; reducing the exposure time and increasing the light sensitivity value of the first lens module and capturing a second image by using the second lens module; extracting a plurality of image features from the first image and the second image respectively and determining a region corresponding to the second image in the first image; and merging the second image into the region in the first image to generate an output image.