Blur Correction for Moving Images on External Displays
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Solution Overview
Problem
Video recording/reproducing apparatuses lack a blur correction function, resulting in blurred images when recording and replaying broadcast programs, which are not compensated for during hand-held use, leading to incomplete image correction and poor display quality on external devices.
Innovation Solution
An image processing device with a blur correction function that connects to external devices, obtains and processes moving image frames, calculates motion compensation information, and applies blur correction sequentially to output clear frames to external displays, utilizing a combination of frame processing, macroblock selection, and interpolation to correct motion vectors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If video recording/reproducing apparatuses record broadcast programs without blur correction function, then the device complexity is reduced and ease of operation is improved, but the image quality deteriorates due to hand movement blur
Solution Approach 1:
The patent applies preliminary action by performing blur correction processing on the reproduced moving image frames before outputting them to the external display device. The motion compensation information is obtained and blur correction is applied in advance to compensate for hand movement blur, so that when the image is displayed externally, it appears clear and sharp rather than blurred.
2Manufacturing precision
If blur correction is applied to moving images recorded without correction, then image quality is improved, but processing time increases and productivity decreases
Solution Approach 1:
The patent performs blur correction processing on reproduced moving image frames in advance before output to external display devices. By obtaining motion compensation information and applying correction algorithms beforehand, the system prepares corrected frames that can be displayed immediately without requiring real-time correction during playback, thus improving processing efficiency.
Solution Approach 2:
The patent uses motion compensation information as an intermediary to enable blur correction. This intermediary parameter (motion vectors) allows the system to calculate and apply appropriate correction amounts without processing every pixel individually, significantly reducing computational complexity and processing time while still achieving effective blur correction.
3Measurement precision
If motion compensation information is obtained for each frame, then blur correction accuracy is improved, but device complexity and processing load increase
Solution Approach 1:
The patent uses motion compensation information (motion vectors) as an intermediary to achieve accurate blur correction with reduced complexity. Instead of analyzing every pixel and calculating correction for each frame independently, the system extracts motion compensation information from the encoded video stream and uses this intermediary data to apply corrections efficiently, achieving high accuracy without proportional increases in processing complexity.
Data Source
AI summary
An imaging device that is connectable to an external display device includes a decoder that, based on an instruction to reproduce coded moving image data recorded in any one of an internal recorder, a memory card and an external recording device, decodes data and sequentially obtains a plurality of frames in a predetermined order. The imaging device also includes a blur estimator that sequentially obtains a total motion vector of each frame corresponding to an obtaining speed and a predetermined order of frames, a blur correction processor that sequentially corrects the blur of the frames based on respective total motion vectors, and a second display processor that sequentially outputs the blur corrected frames to the external display. Blur correction processing for moving images output to the external display is performed suitably.