Image Analysis Device Attitude-Compensated Color Measurement
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Solution Overview
Problem
Existing colorimeter devices face challenges in accurately measuring subject color when the device's attitude changes relative to the subject during image capturing, particularly when used in non-controlled environments like home settings, and require pre-prepared color profiles for specific illumination conditions.
Innovation Solution
An image analysis device with an image capturing unit, a light emitting unit, a sensor unit to detect inclination, and a control unit that adjusts light emission to determine a measurement region spaced apart from the reflection region of the illumination light, allowing for accurate color measurement regardless of device attitude changes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If color profiles are prepared in advance for multiple illumination conditions, then color measurement accuracy under specific lighting is improved, but device complexity and preparation time increase
Solution Approach 1:
The device automatically captures images of color samples and performs color profile creation without user intervention. The control unit autonomously processes the captured images to generate appropriate color profiles for the current illumination conditions, eliminating the need for manual preparation of color profiles for multiple lighting conditions.
Solution Approach 2:
The device captures images of color samples in advance under various illumination conditions and stores the captured data. When a measurement is needed, the system retrieves and applies the pre-captured color sample data corresponding to the current lighting conditions, enabling quick adaptation without real-time profile creation.
2Measurement precision
If color samples are used for color measurement, then measurement accuracy is improved, but ease of operation deteriorates due to requirement of light-shielding members
Solution Approach 1:
The invention extracts only the essential function of color measurement by using color samples that are already present in the measurement environment (such as printed materials or objects with known colors). The complex light-shielding apparatus is removed, and the system relies on capturing images of these color samples along with the subject to perform colorimetric correction.
Solution Approach 2:
The image capturing device serves multiple functions: it captures both the subject image and the color sample image in the same field of view, eliminates the need for separate light-shielding equipment, and performs both color measurement and color profile creation. This multi-functionality simplifies the overall measurement process while maintaining accuracy.
3Ease of operation
If the device attitude changes relative to the subject during image capturing, then ease of operation is improved, but measurement precision deteriorates
Solution Approach 1:
The system dynamically adapts to changes in device attitude by capturing multiple images at different orientations and positions. The control unit processes these multiple captured images to determine the optimal measurement region, compensating for attitude changes. This dynamic approach allows flexible device positioning while maintaining measurement precision through post-capture image processing.
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 easy and accurate color measurement of subjects even when the device's attitude changes during image capturing, without the need for color samples or pre-prepared profiles, by controlling light emission and determining a measurement region based on the positional relationship and inclination.
Implementation Method 1
a light from the light emitting unit regularly reflects at the subject
Data Source
AI summary
An image analysis device according to the present invention includes: an image capturing unit that captures a subject; a light emitting unit that emits light to the subject; a sensor unit that senses an inclination of the image capturing unit relative to the subject; a control unit that causes the image capturing unit to capture an image of the subject while controlling light emission of the light emitting unit; and a determination unit that, based on a positional relationship of the image capturing unit and the light emitting unit and the inclination, determines a measurement region spaced apart by a predetermined distance from a reflection region corresponding to a position in the image where a light from the light emitting unit regularly reflects at the subject.