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مقدمة لمعالجة الصور الرقمية باستخدام الماتلاب 6 عمليات العرض- العمليات الحسابية - الهيستوجرام

Display and plotting Figure Dividing the figure Plot and plot3 Axis on ,off,equal,… Help …. Arithmetic operations Do your operation to each pixel value : 1 -Converting to double 2 – Do your operations. 3 -If new pixel value more than 255 then set pv =255 4 -If pixel value less than 0 then set pv =0 Arithmetic operations Add - imadd(img,v) Subtract - imsubtract(img,v) Multiply – immultiply(img,v) Division – imdivide(img,v) Arithmetic operations Complements The complement of a greyscale image is its photographic negative. Using - imcomplement(img) Histogram Histogram : for gray level image histogram is a graph indicating the number of times each gray level occurs in the image . In a dark image, the gray levels (and hence the histogram) would be clustered at the lower end In a uniformly bright image, the gray levels would be clustered at the upper end In a well contrasted image, the gray levels would be well spread out over much of the range Technique to make histogram Using for loop Easily Using :imhist(gray) Histogram equalization The idea is to change the histogram to one which is uniform. Using histeq(gray)