使用Matlab於影像線性化後的灰階分布圖

Abstract

本次報告內容主要用於描述影像處理中灰階分布線性化的原理，使初學者或是對影像處理感興趣的人初步了解灰階值的應用，以及如何設計一個Matlab程式。先讀取影像圖檔後，將RGB轉換成灰階圖進行像素灰度統計，計算灰度分布密度與累計直方圖，再把累計分布取整數後對灰度值進行均衡化，並作圖出影像線性化後的灰階分布直方圖。

The content of this report is mainly used to describe the principle of gray-scale distribution linearization in image processing. It can let beginners or those who are interested in image processing have a preliminary understanding of the application of gray-scale values and how to design a Matlab program. After inputting the image file, convert the RGB into grayscale image for pixel grayscale statistics, calculate the grayscale distribution density and cumulative histogram, and then take the cumulative distribution to integers to equalize the grayscale values, and plot the result. The histogram of the grayscale distribution of the image is also presented after linearization.