画像の平均階調値保存を考慮した強調度が可変なヒストグラム平坦化

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  • Histogram Equalization with Variable Enhancement Degree for Preserving Mean Brightness

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The histogram equalization (HE) is one of the common methods used for improving contrast in digital images. However, this technique causes a fluctuation of mean brightness. The fluctuation leads to the flicker for video signal. In order to preserve the mean brightness, the dynamic histogram equalization (DHE) is proposed. In this letter, we propose a novel DHE which is called the DHE with variable enhancement degree (DHEwVED). This method can change from DHE to HE by turning one parameter. We also show the effectiveness of the proposed method.

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