Image Processor Sub-Image Segmentation for Bandwidth Reduction
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Solution Overview
Problem
IP cameras with limited viewing angles require mechanical adjustments for panning and tilting, leading to inefficiencies and potential damage, while using wide-angle lenses results in unclear images and high bandwidth requirements for multi-megapixel sensors.
Innovation Solution
An image capturing and transmission device that includes an image processor which converts image data into sub-images with different cutting areas and shrink ratios, reducing transmission traffic and allowing for clear image transmission over ordinary networks, and an image receiving and reconstruction device that decodes and reconstructs these sub-images for enhanced viewing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a wide-angle lens is used to increase the viewing angle, then the viewing angle is improved, but the image clarity deteriorates
Solution Approach 1:
The image is divided into multiple sub-images with different cutting areas and shrink ratios. The area of interest is segmented to maintain high resolution, while other areas use lower resolution, thus resolving the contradiction between wide viewing angle and image clarity.
Solution Approach 2:
Different regions of the image are assigned different quality levels. The area of interest maintains high resolution and clarity, while peripheral areas use lower resolution, allowing the system to achieve both wide viewing angle coverage and preserved clarity where needed.
2Measurement precision
If a multi-megapixel sensor is used to improve image quality, then the image clarity is improved, but the bandwidth requirement increases
Solution Approach 1:
The high-resolution image data is segmented into multiple sub-images with different resolution requirements. Only the area of interest is transmitted at full multi-megapixel resolution, while other areas are transmitted at lower resolutions, significantly reducing total bandwidth consumption.
Solution Approach 2:
Instead of transmitting the entire high-resolution image, only the necessary portion (area of interest) is transmitted at full resolution. This partial action approach maintains image clarity where needed while avoiding the excessive bandwidth consumption of transmitting the complete high-resolution image.
3Adaptability or versatility
If mechanical rotation mechanisms are used to change lens angle, then the viewing angle coverage is improved, but the device reliability deteriorates due to friction and damage
Solution Approach 1:
The mechanical rotation system is replaced with an electronic/image processing system. Instead of physically rotating the lens to change viewing angles, the system uses image cropping and processing to achieve the same effect, eliminating friction and mechanical wear while maintaining viewing angle coverage.
4Measurement precision
If the entire high-resolution image is transmitted to maintain clarity, then the image clarity is improved, but the transmission time increases
Solution Approach 1:
The area of interest is extracted from the full high-resolution image and transmitted separately. This allows the system to maintain high clarity for the important region while reducing the total data volume and transmission time by excluding unnecessary peripheral areas from high-resolution transmission.
Data Source
AI summary
An image capturing and transmission device includes an image capturing module, an image processor, an image encoder, and a network transmission module. The image capturing module is used for capturing a scene of an area to be displayed and outputting image data. The image processor converts the image data according to a first and a second cutting areas and a first and a second shrink ratio values, and outputs a first and a second sub-images. The first cutting area includes the second cutting area, and the first shrink ratio value is greater than the second shrink ratio value. The image encoder encodes the first and the second sub-images according to first and second encoding information, and outputs a first and a second streaming images. The network transmission module is used for transmitting the first and the second streaming images.