Moving Image Processing Apparatus for Flicker and Clipping Suppression
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Solution Overview
Problem
Existing methods for increasing frame frequency to reduce moving blurring and flickers in display devices suffer from issues like high arithmetic complexity, estimation errors, and the negative-side clipping phenomenon of high-frequency components, which affect image quality and visibility.
Innovation Solution
A moving image processing apparatus that concentrates high-frequency components on one sub-frame and distributes low-frequency components across both sub-frames, adjusting distribution rates based on the level of low-frequency components to minimize flickers and clipping, thereby enhancing image visibility and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the frame frequency is doubled to reduce moving blurring, then moving blurring is nearly halved, but information of an image is missing every other frame
Solution Approach 1:
The patent applies motion compensation processing in advance to predict and generate intermediate images between original frames. By performing motion vector calculation and image synthesis beforehand, the system prepares missing image information prior to display, ensuring continuous visual information without gaps when frame frequency is doubled.
Solution Approach 2:
The patent introduces an intermediate image generation mechanism that acts as a mediator between original frames. The motion compensation processing creates synthetic intermediate images that fill information gaps, serving as a bridge that maintains visual continuity when the display frame rate exceeds the input frame rate.
2Ease of operation
If identical images are displayed twice to maintain frame frequency, then flickers are solved, but moving blurring problem remains the same as original image
Solution Approach 1:
The patent applies different processing strategies to different components of the image signal. By separating images into high-frequency components (edges, details) and low-frequency components (smooth areas), the system applies motion compensation selectively to high-frequency regions where moving blurring is most noticeable, while using simpler interpolation for low-frequency regions.
Solution Approach 2:
The patent changes the temporal distribution parameters of image components by concentrating high-frequency components on specific sub-frames and distributing low-frequency components across multiple sub-frames. This parameter adjustment optimizes the balance between flicker suppression and moving blurring reduction.
3Speed
If high-frequency components are concentrated on one sub-frame, then moving blurring is reduced, but negative-side clipping phenomenon occurs
Solution Approach 1:
The patent applies different distribution strategies to different frequency components and different luminance regions. By analyzing local image characteristics, the system concentrates high-frequency components on specific sub-frames in regions where it benefits moving blurring reduction, while distributing them more evenly in regions prone to negative-side clipping, thus optimizing the trade-off locally.
Solution Approach 2:
The patent implements partial concentration of high-frequency components rather than complete concentration on one sub-frame. By distributing high-frequency components partially across multiple sub-frames based on local image characteristics, the system achieves sufficient moving blurring reduction while avoiding the excessive action that causes negative-side clipping.
4Ease of operation
If low-frequency components are distributed evenly across sub-frames, then flickers are suppressed, but moving image visibility is affected
Solution Approach 1:
The patent applies different distribution rates to low-frequency components based on local image characteristics and luminance levels. In regions where flicker suppression is critical, low-frequency components are distributed evenly across sub-frames, while in regions where moving image visibility is paramount, the distribution is optimized to maintain temporal coherence and reduce visibility degradation.
Data Source
AI summary
In order to distribute low-frequency component image data L in image data for one frame to first and second sub-frames respectively as L1 and L2, a distribution of L2 in the low-frequency component image data L is decided. This decision is made based on a non-linear curve, so that when the low-frequency component image data L falls within a low-level region, a distribution rate of L2 is decreased, and when the low-frequency component image data L falls within a high-level region, the distribution rate of L2 is increased within a range that does not exceed 0.5. In this way, a negative-side clipping phenomenon of high-frequency components is suppressed in the low-level region, and flickers are suppressed in the high-level region.