Histogram Equalization 概念
Histogram Equalization(直方圖均衡化)是一種影像增強技術,透過調整影像的灰階分佈,使影像的對比度提高。此方法特別適用於低對比度影像,例如過亮或過暗的照片,使其細節更加清晰。
步驟 1:計算影像的灰階直方圖
直方圖記錄每個灰階值(0~255)的像素數量 $h(r_k)$。
假設影像為 $M \times N$
範例影像:
$$
\begin{bmatrix}
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