Point Processing(2)

Histogram Equalization: :Histogram Equalizationhisteq() : pixel: img= imread(); img1=histeq(img);

imhist (2/1)imhist pixel : img = imread(); TABLE = imhist(img);

3Imhist(2/2)imhist show(Histogram) : img= imread(); h=histeq(img); imhist(h);

stemstem : h=imhist(img); stem(h, 'r','*'), stem(h,,), : k; r; b); : * ; + ; . .. ;

bar

,

x =[2 3 4 5 7; 4 2 3 2 1];bar(x);

Matlab Function

functionfunctionfunctionMatlab Functionfunction2

average.m

Matlab Functionaverage.m

p=3;

q=7;

r=average(p,q);

p=p+r;

q=q+r;

2015/4/710

Nearest Neighbor Interpolation(NNI) ()2015/4/7112.5aaaaabbbbb Nearest Neighbor Interpolation(NNI) ()2015/4/712

Bilinear Interpolation ()2015/4/713

Bilinear Interpolation ()

Bicubic Interpolation ()

2015/4/715

2015/4/716 Bicubic Interpolation()

Bilinear Interpolation2015/4/717

128*128

2015/4/718NNI BILINEARNNINNIBICUBIC:,,function

2015/4/719Matlab imresize

B=imresize(A, 4() ,nearest); [pixel] bilinear