Camera Device Zero Shutter Lag UHD Image Processing
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Solution Overview
Problem
Camera devices and portable terminal apparatuses face challenges in capturing high-definition (HD) or ultra-high-definition (UHD) resolution images as moving pictures due to shutter lag, which results in delayed image capture and difficulties in transmitting continuous UHD image data at the desired time.
Innovation Solution
The solution involves processing images from camera sensors to generate display and compression images for each frame, where every N-th frame is stored as a reference image, and remaining frames are compared to detect motion vectors. If the motion vector is significant, the frame is compression-coded and transmitted; otherwise, only the motion vector is coded, reducing data transmission and enabling efficient storage and display of UHD moving pictures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If image data of UHD resolution is transmitted from image processor to application processor, then image quality is improved, but transmission time delay increases
Solution Approach 1:
The patent segments the continuous stream of UHD image data into individual frame units, allowing the image processor to prepare and transmit discrete frames to the application processor. This segmentation enables the application processor to process and store each frame independently, reducing the cumulative transmission delay for entire video sequences while maintaining UHD quality.
Solution Approach 2:
The image processor performs preliminary processing and preparation of UHD image data before transmission to the application processor. By pre-processing frames and organizing data in advance, the system reduces the actual transmission and processing time delay, enabling near-real-time capture with minimal shutter lag.
2Productivity
If continuous UHD image data is processed and transmitted in real-time, then frame rate is improved, but processing complexity increases
Solution Approach 1:
The patent divides the complex task of real-time UHD video processing into discrete frame-level operations. Each frame is processed independently through standardized steps (capture, process, transmit, store), which simplifies the overall processing pipeline and enables higher frame rates by avoiding complex inter-frame dependencies.
Solution Approach 2:
The system changes processing parameters such as data format, resolution, and compression settings to optimize the balance between frame rate and processing complexity. By adjusting these parameters dynamically, the system can maintain high frame rates while managing the computational complexity of UHD processing.
3Measurement precision
If shutter delay is eliminated for instant capture, then capture timing precision is improved, but data transmission burden increases
Solution Approach 1:
The patent extracts only the essential capture timing information and critical frame data for immediate transmission and storage, while other less critical data can be processed or compressed. This extraction approach reduces the overall data transmission burden while preserving the precise capture timing information needed for zero shutter lag functionality.
Data Source
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AI summary
A method of shooting a moving picture in a camera device includes acquiring a frame image for each frame from a camera upon shooting a moving picture. The method also includes dividing and generating the acquired image to a display image and a compression image to transmit one frame, and configuring the compression image as a motion vector of a frame corresponding to a reference frame image or a compression image of a reference frame image. The method further includes displaying the display image and restoring and compressing the compression image to a moving picture, and storing the compressed moving picture.