Digital Zoom via Image Sensor Macroblocks
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Solution Overview
Problem
Remote sensing devices, such as Internet cameras, face challenges with power consumption and placement limitations due to high power requirements for image transmission and processing, especially in wireless installations, and lack aesthetically pleasing magnification capabilities.
Innovation Solution
A system enabling advanced optical magnification using image sensor macroblocks, where the number of imager pixels decreases with increased magnification, allowing for higher resolution images to be displayed with reduced power consumption and file size, enabling flexible zooming in any image area without the need for extensive power or data cables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If Internet cameras use wireless communication and high-resolution image transmission, then image quality and detail are improved, but power consumption increases substantially
Solution Approach 1:
The image is divided into multiple zones with different resolution levels. High-resolution areas contain important details while low-resolution areas provide contextual information. This segmentation allows selective transmission of only necessary high-detail regions, reducing overall data transmission power requirements while maintaining critical image quality.
Solution Approach 2:
Different regions of the image are assigned different quality levels based on their importance. Areas containing key subjects or details receive high resolution, while peripheral or less important areas use lower resolution. This local quality differentiation reduces total data volume for transmission without compromising the visibility of important features.
2Measurement precision
If optical zoom systems are implemented to focus on specific areas, then visible detail and resolution in selected areas are improved, but device complexity and power consumption increase
Solution Approach 1:
Instead of using physical optical zoom mechanisms, the system creates digital copies of specific image regions at higher resolution. The image is captured once at full resolution, then software generates zoomed views by extracting and enlarging specific areas. This eliminates mechanical complexity while achieving the same visual effect of focusing on particular subjects.
Solution Approach 2:
The mechanical optical zoom system is replaced with a digital processing approach. Rather than physically moving lenses or mirrors to change focal length, the system uses image processing algorithms to simulate zoom by selecting and enlarging specific regions of the captured image, thereby eliminating mechanical components and their associated complexity.
3Loss of information
If full-resolution images are transmitted continuously, then complete image data is available, but data transmission power and bandwidth requirements increase
Solution Approach 1:
The image data is segmented into multiple resolution layers or zones. Only the necessary portions at full resolution are transmitted, while other areas are transmitted at lower resolutions or compressed more aggressively. This segmentation allows the system to maintain important image information while significantly reducing total data transmission volume and associated power consumption.
Solution Approach 2:
Instead of transmitting complete full-resolution images continuously, the system transmits only the necessary portions at full resolution. Less critical areas are transmitted with reduced detail, providing partial action that satisfies the requirement for image data completeness in important regions while avoiding the excessive power consumption of transmitting all areas at maximum resolution.
Data Source
AI summary
A system and method is provided for enabling an advanced optical magnification (zooming) function for low-power sensors, such as a remote wireless camera, using electronic methods and enabling that magnification be performed in any part of the imager. An image sensor has a set of imager pixels that have a defined field of view. A display device is also provided, which has a far lower resolution than the imager. A magnification level is selected, which results in macroblocks being defined for the sensor. A display data value is generated for each macroblock, and the set of display data values is used to drive a data display. The area of magnification is flexibly selected on the imager. As the magnification level is increased, the number of imager pixels in each macroblock decrease, enabling the display to present increasingly higher resolution images. Accordingly, an aesthetically pleasing magnification function is provided for a low-power, battery operated mobile environment.