Research Article
Application of Histogram Equalization for Image Enhancement in Corrosion Areas
Table 1
Information entropy of each image before and after enhancement.
| | Enhanced method | Corrosion image 1 | Corrosion image 2 | Corrosion image 3 |
| | Original image | 5.7852 | 5.3078 | 5.6116 | | Dark detail enhancement [24] | 6.3003 | 6.3114 | 6.4265 | | Defogging algorithm [17] | 7.3792 | 7.1280 | 7.2139 | | Homomorphic filtering [15] | 7.2913 | 6.8900 | 7.1972 | | Histogram [26] | 7.4714 | 7.3978 | 7.4569 | | Proposed algorithm | 7.4185 | 7.6196 | 7.3890 |
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