Anaglyph Contrast Adjustment Reducing Ghosting Artifacts
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Solution Overview
Problem
Contrast adjustments in anaglyph imaging techniques introduce ghosting artifacts, degrading the imaging quality and causing distracting viewing issues due to the coupling of additional color components into the luma signal, which are not properly filtered by 3D spectacles.
Innovation Solution
A system and method that includes an anaglyph transformer and contrast adjusters to generate and apply contrast adjustments to anaglyph images, with upstream and downstream summing devices calculating and subtracting differences between adjusted and unadjusted signals to produce compensated image signals, reducing or eliminating ghosting artifacts by compensating the input images with these differences.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If contrast adjustment is applied to anaglyph images, then image quality and visibility are improved, but ghosting artifacts are introduced that degrade imaging quality
Solution Approach 1:
The patent segments the contrast adjustment process into separate channels: one for processing the anaglyph image and another for processing the reference image. By dividing the processing into distinct paths with separate summing devices, the system can apply contrast enhancement without allowing color component leakage that causes ghosting artifacts.
Solution Approach 2:
The patent introduces intermediary summing devices that combine the original image signal with the contrast-adjusted signal in a controlled manner. These summing devices act as mediators that allow contrast enhancement while preventing the harmful interaction between color components and the luma signal that would otherwise create ghosting artifacts.
2Ease of operation
If contrast adjustment is applied to anaglyph images, then viewing comfort is improved, but imaging precision is degraded due to unwanted color components
Solution Approach 1:
The patent applies local quality by treating different signal components differently: the luma signal receives contrast enhancement for viewing comfort, while the color components are kept separate and not subjected to the same processing. This localized processing ensures that contrast adjustment improves visibility without introducing unwanted color components that would degrade color filtering precision.
Data Source
AI summary
A system adjusts contrast of an anaglyph image and includes a contrast adjuster processor that generates a contrast-adjusted first luma signal and second luma signal and a contrast-adjusted third luma signal from a first input image signal and second input image signal. An upstream summing node determines a first difference between the first luma signal and third luma signal and a downstream summing node subtracts the first difference from the first signal component of the first input signal. A fine adjuster circuit receives a signal for the first difference and applies a fine adjustment as a gain adjustment, an offset adjustment, and a horizontal and vertical shift.