Image Shift Correction for MR Display Lag and Stability
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Solution Overview
Problem
In Mixed Reality (MR) and Virtual Reality (VR) systems, the delay between head movement and image processing causes discomfort due to lag in displaying images, with existing solutions like shifting the timing of synchronizing signals leading to image disturbances.
Innovation Solution
An image processing device that includes an input unit for receiving image signals and synchronizing signals, an acceptance unit for vertical image shift instructions, and a correction unit that adjusts the synchronizing signal based on the shift amount, ensuring the image shift does not exceed a predetermined limit to prevent image disturbance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the timing of a synchronizing signal is shifted to reduce display delay, then the image can follow head direction more quickly, but image disturbance such as image discontinuation or deviation occurs
Solution Approach 1:
The patent applies partial action by shifting the synchronizing signal timing only within a controlled range that does not exceed one horizontal scanning period. This partial shift is sufficient to reduce display delay and improve responsiveness to head movements, while remaining within bounds that prevent image disturbance and maintain image stability.
2Loss of time
If image processing and CG rendering are performed simultaneously to reduce delay, then the system complexity increases
Solution Approach 1:
The patent implements preliminary action by performing image processing on the captured camera image before CG rendering. The processed image is stored in a buffer, and CG rendering is subsequently performed using this pre-processed image as a background. This sequencing allows simultaneous operation of image processing and CG rendering without increasing system complexity, while still reducing overall display delay.
Data Source
AI summary
Enabling generation of a display image giving less uncomfortable feeling. An image processing device comprises: an input unit configured to receive, as an image signal and a synchronizing signal, a frame image constituting a moving image; an acceptance unit configured to accept an image shift instruction instructing a change of a display position of the frame image in a vertical direction of a given display unit; a correction unit configured to correct the synchronizing signal on the basis of the image shift instruction; and an output unit configured to output the image signal and the corrected synchronizing signal in association with each other. If an image shift amount in the vertical direction included in the image shift instruction exceeds a predetermined amount, the correction unit performs correction corresponding to an image shift amount not more than the predetermined amount.