3D Image Tone Conversion for Height Information Preservation
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Solution Overview
Problem
Existing three-dimensional image processing systems face challenges in accurately converting high-tone distance images to low-tone distance images, leading to loss of height information and reduced inspection accuracy, especially when using fixed tone conversion parameters.
Innovation Solution
A three-dimensional image processing apparatus and method that includes a light projecting part for structured illumination, an image capturing part, a distance image generating part, and a tone conversion part with an automatic setting mechanism to adjust tone conversion parameters based on height information, allowing for dynamic tone conversion and improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If fixed tone conversion parameters are used to convert high-tone distance images to low-tone distance images, then the conversion process is simple and fast, but height information is lost and inspection accuracy deteriorates
Solution Approach 1:
The patent applies dynamics by making the tone conversion parameters adjustable and adaptable rather than fixed. The system dynamically determines optimal conversion parameters based on the specific characteristics of the distance image being converted, allowing the conversion process to adapt to different inspection scenarios while maintaining both speed and accuracy
Solution Approach 2:
The patent implements parameter changes by modifying the tone conversion parameters based on the actual height information distribution in the distance image. The system analyzes the distance image characteristics and adjusts conversion parameters accordingly, transforming the static conversion process into a dynamic one that preserves height information while maintaining conversion efficiency
2Measurement precision
If tone conversion parameters are manually adjusted to preserve height information, then inspection accuracy improves, but the operation becomes complex and time-consuming
Solution Approach 1:
The patent applies self-service by enabling the system to automatically determine and set optimal tone conversion parameters without requiring manual intervention. The system autonomously analyzes the distance image characteristics and configures the conversion parameters itself, eliminating the need for complex manual parameter adjustment while preserving inspection accuracy
Solution Approach 2:
The patent implements feedback by using the analyzed characteristics of the distance image to automatically adjust the tone conversion parameters. The system evaluates the height information distribution and uses this feedback to optimize the conversion process, replacing manual parameter setting with an automated feedback-driven approach
3Adaptability or versatility
If high-tone distance images are converted to low-tone distance images, then compatibility with existing image processing systems is improved, but necessary height information is lost
Solution Approach 1:
The patent applies parameter changes by optimizing the tone conversion process to preserve critical height information while reducing the tone range. By dynamically adjusting conversion parameters based on the distance image characteristics, the system maintains essential height data even when converting to a lower tone format, thereby preserving information while achieving compatibility
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 solution enables accurate tone conversion of high-tone distance images to low-tone distance images, preserving necessary height information and enhancing inspection accuracy by automatically setting tone conversion parameters, thus avoiding errors in defect detection.
Implementation Method 1
the principle of triangulation will be described based on FIG. 160. In the head section, an angle α between an optical axis of incident light emitted from a light projecting section 110 and an optical axis of reflected light that is incident on a light receiving section 120 (optical axis of the light receiving section 120) is previously set.
Implementation Method 2
when the workpiece is mounted on the workpiece mounting place, the incident light emitted from the light projecting section 110 is reflected by a point A on the surface of the workpiece and is incident as reflected light on the light receiving section 120
Data Source
AI summary
A three-dimensional image processing apparatus includes: an image capturing part for acquiring reflected light to capture a plurality of pattern projected images; a distance image generating part capable of generating a distance image based on the plurality of pattern projected images; a tone conversion part for tone-converting the distance image generated in the distance image generating part to a low-tone distance image that has a lower number of tones than the number of tones of the distance image and is obtained by replacing height information in the distance image with a shade value of the image; and a tone conversion condition automatic setting part for automatically setting, based on the height information in the distance image, a tone conversion parameter for prescribing a tone conversion condition at the time of tone-converting the distance image to the low-tone distance image in the tone conversion part.