Piecewise histogram equalization based image enhancement
Piecewise histogram equalization（Piecewise HE） was proposed,which combines the benefits of contrast stretching and existing histogram equalization.The swallow of saturation and brightness is avoided in the enhanced image by a piecewise linear mapping function,which combines with the mean and standar...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | zho |
| Published: |
Editorial Department of Journal on Communications
2011-01-01
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| Series: | Tongxin xuebao |
| Subjects: | |
| Online Access: | http://www.joconline.com.cn/zh/article/74420065/ |
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| Summary: | Piecewise histogram equalization（Piecewise HE） was proposed,which combines the benefits of contrast stretching and existing histogram equalization.The swallow of saturation and brightness is avoided in the enhanced image by a piecewise linear mapping function,which combines with the mean and standard deviation of the histogram,and the parameters selection of Piecewise HE is explored when over-enhancement existed.The experimental results have demonstrated that the proposed method can enhance the images effectively,which avoids the swallow and over-enhancement problems of the existing histogram equalization methods.The proposed method not only preserves the original details,but also has a more natural visual effect in the enhanced image. |
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| ISSN: | 1000-436X |