Image Detecting Device Using Segmented Sensor for Distance Measurement
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Solution Overview
Problem
Current image sensors face challenges in accurately detecting identification images while simultaneously capturing images and performing functions like face recognition and iris recognition, especially in low-illuminance environments and at varying distances, due to limitations in illuminance measurement and distance calculation without separate sensors.
Innovation Solution
An image detecting device comprising a color image sensor, a mono image sensor, and an image signal processor that uses synchronized infrared lighting to measure distance and illuminance values, generating identification images based on infrared and color image data, allowing for accurate detection in various lighting conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single image sensor is used for both color image capture and identification image detection, then device complexity is reduced, but measurement precision of illuminance and distance values deteriorates
Solution Approach 1:
The patent segments the image sensing function by dividing the image sensor array into multiple regions, where different regions are specialized for different functions: color image capture, infrared sensing for distance measurement, and identification image detection. This segmentation allows each region to be optimized for its specific purpose while using a single integrated sensor device.
Solution Approach 2:
The patent implements multi-functionality by enabling the image sensor to perform multiple functions simultaneously using different spectral bands. The same sensor device captures visible light for color images and infrared light for distance and identification detection, allowing one device to replace what would traditionally require separate sensors.
2Measurement precision
If separate sensors are used for color imaging, infrared distance measurement, and identification detection, then measurement precision improves, but device complexity increases
Solution Approach 1:
The patent merges multiple sensing functions into a single image sensor device. By integrating color imaging, infrared distance measurement, and identification detection capabilities into one unified sensor array, the system achieves precise measurements while reducing the number of separate components needed.
Solution Approach 2:
The patent extends the sensing capability into the infrared dimension, allowing the sensor to detect wavelengths beyond the visible spectrum. This dimensional extension enables simultaneous color imaging (visible light) and distance measurement (infrared) using the same sensor infrastructure.
3Measurement precision
If infrared lighting is continuously provided for distance measurement, then measurement precision improves, but power consumption increases
Solution Approach 1:
The patent employs periodic action by providing infrared lighting in pulsed intervals rather than continuously. The infrared light source is activated only when distance measurement is required, and the sensor captures reflections during these brief pulses, significantly reducing power consumption while maintaining measurement precision.
Solution Approach 2:
The system performs preliminary determination of whether distance measurement is needed based on operational context, and only activates the infrared lighting when actually required. This preliminary assessment prevents unnecessary energy consumption while ensuring measurement precision is maintained when needed.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate detection of identification images with reduced power consumption and improved image processing efficiency, enabling effective face and iris recognition across different illuminance levels and distances without the need for separate sensors.
Implementation Method 1
a mono image sensor configured to sense the first infrared light or the second infrared light reflected from the subject and output infrared image data based on the sensing of the first infrared light or the second infrared light
Implementation Method 2
a color image sensor configured to sense visible light and to output color image data based on the sensed visible light
Implementation Method 3
sense the first infrared light or the second infrared light reflected from the subject
Data Source
AI summary
An image detecting device includes a color image sensor configured to sense visible light and to output color image data based on the sensed visible light; a first infrared lighting source configured to provide first infrared rays to a subject; a second infrared lighting source configured to provide second infrared rays to the subject; a mono image sensor configured to sense a first infrared light or a second infrared light reflected from the subject and output infrared image data; andan image signal processor configured to, measure an illuminance value based on the color image data, measure a distance value of the subject based on a portion of the infrared image data corresponding to the first infrared light, and obtain an identification image of the subject based on the illuminance value, the distance value, and a portion of the infrared image data corresponding to the second infrared light.