Partial Data Decompression for Imaging Apparatus Display Latency
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Solution Overview
Problem
Imaging apparatuses face delays in processing and display responsiveness due to the need for decompressing and reading compressed data from memory, leading to increased circuit size and processing time.
Innovation Solution
An imaging apparatus that decompresses only designated partial data for immediate display, allowing for improved responsiveness by processing and displaying de-compressed data without the need for full decompression, while also enabling whole data decompression for complete image processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all pixels in a region are obtained before compression starts, then compression can be performed with accurate minimum and maximum values, but processing is delayed and another memory is necessary increasing circuit size
Solution Approach 1:
The patent divides the image processing into segments: compression is performed on pixel data groups as they arrive rather than waiting for complete regions, and only necessary statistics (minimum, maximum, average) are maintained separately from the compressed output data
Solution Approach 2:
The patent extracts only the essential statistical information (minimum value, maximum value, average value) needed for compression from the pixel data, separating these statistics from the main data flow to minimize memory requirements while maintaining compression accuracy
2Reliability
If compressed data is stored in memory and then read and de-compressed for display, then processing can be completed, but display responsiveness is reduced and processing time increases
Solution Approach 1:
The patent performs compression actions preliminarily as pixel data arrives, maintaining compressed data in a ready state without requiring subsequent read-decompress-display cycles, thus eliminating delays in the display pipeline
Solution Approach 2:
The patent establishes continuous compression processing that operates throughout data acquisition rather than batch processing after data collection, ensuring the compression function operates continuously without interruption or re-reading from memory
3Productivity
If a larger memory capacity is provided to handle increased data amounts, then processing can be completed, but circuit size and cost increase
Solution Approach 1:
The patent applies different data handling qualities to different parts of the system: compressed data with reduced bit depth is used for display purposes while maintaining full precision statistics separately, allowing optimized memory usage for each function
Solution Approach 2:
The patent changes the data representation parameters by using compressed formats with minimum/maximum/average statistics instead of full pixel data for display, reducing the memory capacity required while maintaining processing capability
Data Source
AI summary
An imaging apparatus includes the following processing units. An imaging device generates first image data according to incident light. A compression unit performs fixed length coding on the first image data to generate first compressed data. A storage unit stores the first compressed data. A de-compression unit de-compresses only first designated data that is a part of the first compressed data so as to generate first partial de-compressed data. A signal processing unit corrects image quality of the first partial de-compressed data to generate first partial corrected image data. A display unit displays the first partial corrected image data.