Panoramic Image Color Correction for Smoother Stitching
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Solution Overview
Problem
Panoramic images stitched from multiple photos often exhibit unnatural stitching traces due to variations in brightness and color, resulting from environmental influences.
Innovation Solution
A color correction method that adjusts luminance and color values of overlapping images in the Lab color space to reduce luminance and color differences, using formulas to enhance the natural appearance of stitched panoramic images.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If multiple photos are stitched together to create panoramic images, then the field of view and coverage are improved, but stitching traces and unnatural appearance occur due to brightness and color variations
Solution Approach 1:
The patent converts images from RGB color space to Lab color space to separate luminance (L channel) and color information (a and b channels). This parameter transformation allows independent processing of brightness and color, enabling precise adjustment of luminance differences and color casts in overlapping regions to eliminate stitching traces while maintaining overall image quality
Solution Approach 2:
The patent divides the color correction process into distinct segments: luminance adjustment and color adjustment. By segmenting the correction tasks and applying different processing strategies to each, the method effectively addresses both brightness mismatches and color variations in stitched panoramic images
2Reliability
If environmental influences are captured in photos, then the realism and authenticity are improved, but brightness and color variations cause obvious stitching traces
Solution Approach 1:
The Lab color space serves as an intermediary representation that decouples luminance and color information. This intermediate format allows the patent to independently adjust brightness and color parameters in overlapping regions without affecting the overall image authenticity, effectively removing stitching traces while preserving environmental realism
Data Source
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AI summary
A color correction method for a panoramic image and an electronic device (100). The method comprises: acquiring a first fisheye image and a second fisheye image; expanding the first fisheye image and the second fisheye image respectively to obtain a first image and a second image in an RGB color space; calculating overlapping areas between the images; converting the first image and the second image from the RGB color space to a Lab color space; in the Lab color space, adjusting the brightness of the first image and the brightness of the second image; converting the first image and the second image from the Lab color space to the RGB color space; according to the mean color value of a first overlapping area and the mean color value of a second overlapping area, adjusting the color value of the second image by using the first image as a reference, or adjusting the color value of the first image by using the second image as a reference. Hence, according to the method, the transition of the panoramic image obtained after stitching is smoother and the panoramic image seems more nature.