Integrated Color Chart for Image-Pickup Device Adjustment
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Solution Overview
Problem
Conventional imaging systems require unnecessary replacement of white and color charts for adjustment, leading to increased adjustment time and potential inaccuracies due to field angle dispersion affecting exposure.
Innovation Solution
An image-pickup system with a mode switching unit and a color chart comprising an achromatic and chromatic color, allowing for partial photometry in an adjustment mode to control exposure and improve accuracy, reducing adjustment time and eliminating field angle effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional imaging systems use separate white chart and color-bar chart for adjustment, then white balance and color balance can be adjusted, but adjustment time increases and operational complexity increases
Solution Approach 1:
The patent combines the white chart and color-bar chart into a single integrated color chart that includes both achromatic (white) and chromatic (color bar) regions. This merging eliminates the need to replace charts during adjustment, reducing adjustment time while maintaining the ability to perform both white balance and color balance adjustments simultaneously.
Solution Approach 2:
The integrated color chart serves multiple functions: it provides reference for white balance adjustment through its achromatic region and for color balance adjustment through its chromatic regions. This multi-functional design allows a single chart to replace two separate charts, improving operational efficiency.
2Ease of operation
If conventional systems use center-weighted average photometry for exposure control, then exposure can be controlled, but field angle dispersion affects measurement accuracy
Solution Approach 1:
The patent introduces separate photometric regions (first photometric region and second photometric region) that are specifically positioned to avoid field angle dispersion effects. By localizing photometry to these specific regions rather than using center-weighted average across the entire image, the system maintains ease of exposure control while improving measurement accuracy.
3Adaptability or versatility
If the color chart is replaced during adjustment, then different adjustment stages can be performed, but adjustment time increases
Solution Approach 1:
The patent merges the functionality of multiple adjustment charts into a single integrated color chart that contains both achromatic and chromatic regions. This allows the system to perform different adjustment stages (white balance and color balance) without physically replacing the chart, thereby maintaining adaptability while eliminating replacement time.
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
The system enables precise white balance and color balance adjustments with reduced time and improved accuracy by using a color chart with achromatic and chromatic colors, eliminating the need for chart replacement and minimizing exposure errors from field angle dispersion.
Implementation Method 1
a light ray incident on the lens 301 is photo-electrically converted by the imaging element 303
Data Source
AI summary
When switching a mode between an imaging mode imaging an object and an adjustment mode adjusting an image produced by the imaging, in accordance with the switched mode, one photometric region is selected from at least two photometric regions to an image signal obtained from incident light, and exposure of the incident light is controlled on the selected photometric region based on photometric information, thereby achieving accuracy in adjusting the image produced by imaging an object by preventing effect on exposure due to dispersion in field angle.