Digital Image Shake Blur Correction via Multi-Exposure Pixel Alignment
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Solution Overview
Problem
Digital cameras face challenges in preventing and correcting image blur caused by hand shake during shooting, as existing hardware and software solutions either introduce noise or are costly and bulky.
Innovation Solution
A digital image processing method that adjusts aperture value and ISO speed to determine a safe shutter time, shoots multiple images if the shutter time exceeds this threshold, and performs image compensation by aligning pixels from similar images to generate a clear composite image.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical anti-shake means with movement detecting element is used, then image blur is corrected, but device complexity and cost increase
Solution Approach 1:
The patent replaces mechanical anti-shake mechanisms with a software-based image processing method. The system captures multiple images at different shutter speeds and uses image registration and blending algorithms to correct blur, eliminating the need for mechanical movement detecting elements and lens shifting mechanisms.
Solution Approach 2:
The patent captures multiple copies of the same scene at different shutter speeds. By taking several images with varying exposure times and combining them through image processing, the system creates a final image that is less susceptible to hand shake blur without requiring complex mechanical stabilization components.
2Reliability
If aperture is enlarged to shorten shutter time, then hand shake blur is reduced, but lens cost and volume increase
Solution Approach 1:
The patent changes the shutter speed parameter across multiple captured images rather than relying on a single fast shutter speed that would require a large aperture. By varying shutter time and combining multiple exposures, the system achieves blur reduction without needing a large-aperture lens.
3Reliability
If multiple digital images are shot and processed, then image clarity is improved, but processing time increases
Solution Approach 1:
The patent captures more images than strictly necessary (excessive action) to ensure sufficient quality material for blending. By taking multiple images with varying shutter speeds and selecting/combining the best portions, the system achieves good results while managing processing complexity through selective blending rather than processing every possible parameter combination.
Data Source
AI summary
A digital image processing method for correcting a shaking blur corrects a blurred image caused by a shake when a user shoots an image with a digital camera, which includes the following steps obtaining a safe shutter time of the digital camera; performing an exposure adjustment procedure, for adjusting an aperture and a ISO speed of the digital camera respectively, and obtaining a shutter time of the digital camera after being adjusted; performing a shooting procedure; shooting a plurality of digital images, if the shutter time of the digital camera is greater than the safe shutter time; and then performing an image compensation procedure according to the digital images, to align the same image object in the digital images and then to overlay each pixel of the digital images one by one, thereby outputting an output image.