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Updated: Feb 2, 2026
05:50
Contrast Enhanced Vessel Imaging using MicroCT
Published on: January 27, 2011
13.1K
A POSHE-Based Optimum Clip-Limit Contrast Enhancement Method for Ultrasonic Logging Images
Qingqing Fu1,2, Zhengbing Zhang3,4, Mehmet Celenk5
1Electronics and Information School, Yangtze University, Jingzhou 434023, China. jpufqq@yangtzeu.edu.cn.
Sensors (Basel, Switzerland)
|November 18, 2018
Summary
A new method enhances ultrasonic logging images, improving contrast and detail visibility. This technique aids in analyzing geologic features from piezoceramic transducer data.
Area of Science:
- Geophysics
- Image Processing
Background:
- Ultrasonic logging images from piezoceramic transducers often exhibit low contrast and poor local detail.
- This limits the accurate analysis and interpretation of geological features within the wellbore.
Purpose of the Study:
- To introduce a novel contrast enhancement method for ultrasonic logging images.
- To improve the visibility of local details and geologic features in these images.
Main Methods:
- A partially overlapped sub-block histogram equalization (POSHE)-based optimum clip-limit contrast enhancement (POSHEOC) method was developed.
- The method incorporates contrast limitation and a new quality index based on mean gradient and structural similarity to automatically determine the optimal clip-limit.
Main Results:
- The POSHEOC method significantly enhances image contrast and emphasizes local details.
- It effectively preserves image brightness and avoids over-enhancement, outperforming existing techniques.
- Both visual and quantitative evaluations confirm superior image quality.
Conclusions:
- The POSHEOC method offers a feasible and effective solution for enhancing ultrasonic logging images.
- This advancement is crucial for improving the interpretation accuracy of actual ultrasonic logging data.
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