Image Sensor Test Image Generator for Accurate Performance Evaluation
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Solution Overview
Problem
The existing methods for evaluating the performance of image sensors are inadequate as they do not accurately replicate the operational environment, leading to inconsistent and unreliable performance assessments.
Innovation Solution
An image processing method that adjusts the capacity and speed of pixel data transmission to an image sensor test device through an interface, allowing for the generation and transmission of test image data based on divided column regions of pixel data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel data is transmitted at full capacity and speed through the interface, then the transmission completeness is improved, but the interface bandwidth requirement increases
Solution Approach 1:
The pixel data is divided into multiple packet groups, where each packet group contains a specific number of pixel data packets. This segmentation allows the data to be transmitted in manageable chunks, reducing the instantaneous bandwidth requirement while ensuring complete transmission through systematic packet grouping and tracking
2Reliability
If all column regions are processed together, then the processing completeness is improved, but the processing complexity increases
Solution Approach 1:
The pixel array's column regions are divided into multiple groups, with each group containing a specific number of columns (e.g., 2n columns per group). This segmentation enables the processing system to handle smaller, more manageable portions of data at a time, reducing processing complexity while maintaining completeness through systematic group-by-group processing
Solution Approach 2:
The pixel data is pre-organized into packet groups with predetermined column region assignments before transmission and processing. This preliminary organization allows the processing device to immediately begin systematic processing without requiring complex dynamic allocation, thereby reducing processing complexity while ensuring all column regions are eventually processed
Data Source
AI summary
An image sensor includes a test image generator configured to receive pixel data of a group of pixels including channel that corresponds to a size of a plurality of row regions of a pixel array that includes the plurality of row regions and a plurality of column regions, and is configured to generate test image data based on the pixel data, and an interface configured to transmit the test image data from the test image generator to a test device. The test image generator is configured to divide the pixel data into a first column region corresponding to 2n-th column region of the column regions of the pixel data and a second column region corresponding to 2n−1-th column region of the column regions of the pixel data and configured to generate a test image based on the first column region.