数字图像处理（MATLAB）——图像类型、数据类型转换、数组索引

f= [ -0.5  0.5
    0.75  1.5 ]

g = im2uint8(f)

h = uint8([25 50;128 200])
g = im2double(h)
f = [1 2 ; 3 4]
g = mat2gray(f)
gb = im2bw(g,0.6)

gb = f>2

gbv = islogical(gb)
gbd = im2double(gb)

gbd = double(gb)

gbd = im2double(im2bw(mat2gray(f),0.6));
gbd = double(f>2)

v = [1 3 5 7 9]
v(4)
v(1:3)
v(3:end)
v(:)
v(1:end)
v(1:2:end)
v(end:-2:1)
x = linspace(3,5,2)
v([1 4 5])
A = [1 2 3; 4 5 6;7 8 9]
A(2,3)
C3 = A(:,3)
R2 = A(2,:)
T2 = A(1:2,1:3)
B = A;
B(:,3) = 0
A(end,end)
A(end,end-2)
A(2:end,end:-2:1)

E = A([1 3],[2 3])
D = logical([1 0 0;0 0 1;0 0 0])
A(D)
v = T2(:)
s = sum(A(:))

f = imread('F:\学习\研一上\数字图像处理\数字图像处理\作业1\rose.tif');
size (f)
whos f
subplot(2,2,1)
imshow(f,[])

subplot(2,2,2)
fp = f(end:-1:1,:);
imshow(fp,[])
fc = f(25