Anaglyph Ghost Cancellation via Display Filter Compensation
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Solution Overview
Problem
Conventional anaglyph techniques suffer from ghosting, a phenomenon where an image intended for one eye is viewed by the other, causing distortion due to filtering applied by standard 2D displays like monitors or televisions.
Innovation Solution
A method and apparatus that generate anaglyph image information and produce a ghost cancellation signal to combine with the anaglyph image information, specifically using ghost cancellation processing to counteract the effects of filtering by 2D displays, such as sharpness filters, thereby reducing or eliminating ghosting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional anaglyph techniques are used to produce stereoscopic images on 2D displays, then the images can be viewed with color-filtered spectacles, but ghosting occurs where an image intended for one eye is viewed by the other eye causing distortion
Solution Approach 1:
The patent applies preliminary anti-action by calculating a ghost cancellation signal that predicts and counteracts the ghosting effect before it occurs. The system pre-computes what the ghosting artifact will look like based on the left and right eye images, then subtracts this predicted ghosting from the final anaglyph image, thereby eliminating the distortion before display.
Solution Approach 2:
The patent converts the harmful ghosting effect into a benefit by using the same filtering operation that causes ghosting to generate a cancellation signal. The system applies the display's sharpness filter to create a ghosting prediction, then uses this predicted ghosting as the cancellation signal to remove actual ghosting, thereby turning the harmful filtering effect into a useful tool for ghost removal.
2Measurement precision
If sharpness filters are applied by 2D displays to improve image appearance, then image clarity is enhanced, but ghosting is produced in anaglyph images
Solution Approach 1:
The patent performs preliminary action by applying the sharpness filter early in the processing pipeline to generate both the enhanced image and the ghosting prediction. By performing this filtering action beforehand, the system can extract the ghosting component from the filtered signal and use it to create a cancellation signal that removes ghosting from the final anaglyph image.
Solution Approach 2:
The patent segments the image processing into distinct components: the original anaglyph image, the ghosting prediction signal, and the ghost cancellation signal. By separating these components and processing them independently, the system can selectively remove only the harmful ghosting artifact while preserving the beneficial sharpness enhancement.
Data Source
AI summary
Ghosting of images can be produced by the use anaglyph techniques to produce stereoscopic images. Ghost effects can be produced when filtering is applied to images by displays such as televisions or monitors. Techniques and apparatus are described for reducing or cancelling ghost effects. Anaglyph ghost reduction information can be produced to reduce or cancel ghost effects.