Stereoscopic Display Crosstalk Correction via Gamma Conversion
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Stereoscopic display devices experience crosstalk due to stray light and liquid crystal response delay, leading to deteriorated visibility and contrast, with existing correction methods unable to effectively handle complex crosstalk amounts.
Innovation Solution
A method that detects crosstalk ranges and amounts in both bright and dark displays, applies smoothing filters to create lower and upper limit data, and gamma-converts images to reduce crosstalk, considering liquid crystal response delay.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If time division system with directional backlight is used for stereoscopic display, then stereoscopic viewing capability is improved, but crosstalk occurs due to stray light and liquid crystal response delay
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correction values for crosstalk in lookup tables before actual display operation. The correction data is prepared in advance based on predetermined gradation values, allowing the system to compensate for crosstalk effects without real-time complex calculations, thus maintaining stereoscopic viewing capability while reducing visible crosstalk
Solution Approach 2:
The patent changes parameters by adjusting luminance values through gamma conversion using correction data. The system modifies the luminance parameters of displayed images by applying correction values that account for crosstalk, thereby transforming the display characteristics to reduce the visibility of crosstalk while preserving the stereoscopic effect
2Object-affected harmful factors
If existing crosstalk correction method is applied, then constant crosstalk can be reduced, but display quality deteriorates and contrast is remarkably deteriorated
Solution Approach 1:
The patent applies local quality by implementing different correction strategies for different luminance regions. Instead of uniform correction, the system uses gamma conversion with correction data that is tailored to specific luminance ranges, applying appropriate correction only where needed. This localized approach reduces constant crosstalk while preserving display quality and contrast in different regions of the image
Solution Approach 2:
The patent uses copying by creating correction data tables that store pre-calculated correction values for different gradation levels. These correction tables serve as templates that are applied to correct crosstalk in actual display content, allowing the system to replicate the correction effect across different images without re-calculating from scratch, thus maintaining display quality while correcting crosstalk
3Object-affected harmful factors
If lowest luminance of input image is raised to maximum crosstalk amount, then crosstalk is eliminated, but entire contrast is remarkably deteriorated
Solution Approach 1:
The patent applies parameter changes by using gamma conversion to adjust luminance values according to correction data. Instead of uniformly raising the lowest luminance, the system transforms luminance parameters selectively based on the correction tables, which contain pre-calculated values that account for crosstalk while preserving contrast relationships between different luminance levels in the image
4Object-affected harmful factors
If smoothing filter is applied to correction data, then luminance transitions are smoothed and crosstalk becomes less noticeable, but processing complexity increases
Solution Approach 1:
The patent applies preliminary action by pre-calculating smoothed correction values and storing them in lookup tables before actual display operation. The smoothing filter is applied in advance to the correction data, creating pre-smoothed correction tables that can be directly applied during display without real-time filtering. This reduces visible crosstalk while avoiding the processing complexity of real-time smoothing operations
Data Source
AI summary
An object of the invention to provide a method for maintaining display quality as much as possible and reducing a crosstalk amount. A method for correcting stereoscopic images according to the present invention has (a) at least one of a step of detecting a range of crosstalk and a crosstalk amount occurring on a left image or a right image as black-side correction data, and a step of detecting the range of crosstalk and the crosstalk amount as white-side correction data, based on crosstalk characteristic data, (b) at least one of a step of making the black-side correction data into lower-limit data, and a step of making the white-side correction data into upper-limit data; and (c) a step of gamma-converting the left image or the right image based on at least one of the lower-limit data and the upper-limit data.