How to reduce the dimensions of an image after applying PCA.
2 views (last 30 days)
Show older comments
I have an .tif image with 200x350x50 image which has 50 bands of data and I want to reduce it to 200x350x20 with 20 bands. I have selected few bands accordingly i.e(1,5,7,8,11,15,18,21,22,25,29,31,32,33,34,37,41,45,46,47) 20 bands.
I have used pca(X) to find the principal component and written it into a new file.
I_d = double(imread('clicker.tif')); X = reshape(I_d,size(I_d,1)*size(I_d,2),50); coeff = pca(X); Z = X*coeff; Ipc1 = reshape(Z(:,1),size(I_d,1),size(I_d,2)); Ipc2 = reshape(Z(:,2),size(I_d,1),size(I_d,2)); Ipc3 = reshape(Z(:,3),size(I_d,1),size(I_d,2)); Ipc4 = reshape(Z(:,4),size(I_d,1),size(I_d,2)); Ipc5 = reshape(Z(:,5),size(I_d,1),size(I_d,2)); Ipc6 = reshape(Z(:,6),size(I_d,1),size(I_d,2)); Ipc7 = reshape(Z(:,7),size(I_d,1),size(I_d,2)); Ipc8 = reshape(Z(:,8),size(I_d,1),size(I_d,2)); Ipc9 = reshape(Z(:,9),size(I_d,1),size(I_d,2)); Ipc10 = reshape(Z(:,10),size(I_d,1),size(I_d,2)); Ipc11 = reshape(Z(:,11),size(I_d,1),size(I_d,2)); Ipc12 = reshape(Z(:,12),size(I_d,1),size(I_d,2)); Ipc13 = reshape(Z(:,13),size(I_d,1),size(I_d,2)); Ipc14 = reshape(Z(:,14),size(I_d,1),size(I_d,2)); Ipc15 = reshape(Z(:,15),size(I_d,1),size(I_d,2)); Ipc16 = reshape(Z(:,16),size(I_d,1),size(I_d,2)); Ipc17 = reshape(Z(:,17),size(I_d,1),size(I_d,2)); Ipc18 = reshape(Z(:,18),size(I_d,1),size(I_d,2)); Ipc19 = reshape(Z(:,19),size(I_d,1),size(I_d,2)); Ipc20 = reshape(Z(:,20),size(I_d,1),size(I_d,2)); Ipc21 = reshape(Z(:,21),size(I_d,1),size(I_d,2)); Ipc22 = reshape(Z(:,22),size(I_d,1),size(I_d,2)); Ipc23 = reshape(Z(:,23),size(I_d,1),size(I_d,2)); Ipc24 = reshape(Z(:,24),size(I_d,1),size(I_d,2)); Ipc25 = reshape(Z(:,25),size(I_d,1),size(I_d,2)); Ipc26 = reshape(Z(:,26),size(I_d,1),size(I_d,2)); Ipc27 = reshape(Z(:,27),size(I_d,1),size(I_d,2)); Ipc28 = reshape(Z(:,28),size(I_d,1),size(I_d,2)); Ipc29 = reshape(Z(:,29),size(I_d,1),size(I_d,2)); Ipc30 = reshape(Z(:,30),size(I_d,1),size(I_d,2)); Ipc31 = reshape(Z(:,31),size(I_d,1),size(I_d,2)); Ipc32 = reshape(Z(:,32),size(I_d,1),size(I_d,2)); Ipc33 = reshape(Z(:,33),size(I_d,1),size(I_d,2)); Ipc34 = reshape(Z(:,34),size(I_d,1),size(I_d,2)); Ipc35 = reshape(Z(:,35),size(I_d,1),size(I_d,2)); Ipc36 = reshape(Z(:,36),size(I_d,1),size(I_d,2)); Ipc37 = reshape(Z(:,37),size(I_d,1),size(I_d,2)); Ipc38 = reshape(Z(:,38),size(I_d,1),size(I_d,2)); Ipc39 = reshape(Z(:,39),size(I_d,1),size(I_d,2)); Ipc40 = reshape(Z(:,40),size(I_d,1),size(I_d,2)); Ipc41 = reshape(Z(:,41),size(I_d,1),size(I_d,2)); Ipc42 = reshape(Z(:,42),size(I_d,1),size(I_d,2)); Ipc43 = reshape(Z(:,43),size(I_d,1),size(I_d,2)); Ipc44 = reshape(Z(:,44),size(I_d,1),size(I_d,2)); Ipc45 = reshape(Z(:,45),size(I_d,1),size(I_d,2)); Ipc46 = reshape(Z(:,46),size(I_d,1),size(I_d,2)); Ipc47 = reshape(Z(:,47),size(I_d,1),size(I_d,2)); Ipc48 = reshape(Z(:,48),size(I_d,1),size(I_d,2)); Ipc49 = reshape(Z(:,49),size(I_d,1),size(I_d,2)); Ipc50 = reshape(Z(:,50),size(I_d,1),size(I_d,2)); I_b = zeros(350,400,50) ; I_b(:,:,1) = Ipc1; I_b(:,:,2) = Ipc2; I_b(:,:,3) = Ipc3; I_b(:,:,4) = Ipc4; I_b(:,:,5) = Ipc5; I_b(:,:,6) = Ipc6; I_b(:,:,7) = Ipc7; I_b(:,:,8) = Ipc8; I_b(:,:,9) = Ipc9; I_b(:,:,10) = Ipc10; I_b(:,:,11) = Ipc11; I_b(:,:,12) = Ipc12; I_b(:,:,13) = Ipc13; I_b(:,:,14) = Ipc14; I_b(:,:,15) = Ipc15; I_b(:,:,16) = Ipc16; I_b(:,:,17) = Ipc17; I_b(:,:,18) = Ipc18; I_b(:,:,19) = Ipc19; I_b(:,:,20) = Ipc20; I_b(:,:,21) = Ipc21; I_b(:,:,22) = Ipc22; I_b(:,:,23) = Ipc23; I_b(:,:,24) = Ipc24; I_b(:,:,25) = Ipc25; I_b(:,:,26) = Ipc26; I_b(:,:,27) = Ipc27; I_b(:,:,28) = Ipc28; I_b(:,:,29) = Ipc29; I_b(:,:,30) = Ipc30; I_b(:,:,31) = Ipc31; I_b(:,:,32) = Ipc32; I_b(:,:,33) = Ipc33; I_b(:,:,34) = Ipc34; I_b(:,:,35) = Ipc35; I_b(:,:,36) = Ipc36; I_b(:,:,37) = Ipc37; I_b(:,:,38) = Ipc38; I_b(:,:,39) = Ipc39; I_b(:,:,40) = Ipc40; I_b(:,:,41) = Ipc41; I_b(:,:,42) = Ipc42; I_b(:,:,43) = Ipc43; I_b(:,:,44) = Ipc44; I_b(:,:,45) = Ipc45; I_b(:,:,46) = Ipc46; I_b(:,:,47) = Ipc47; I_b(:,:,48) = Ipc48; I_b(:,:,49) = Ipc49; I_b(:,:,50) = Ipc50; multibandwrite(I_b,'pca..tif','bsq');
0 Comments
Answers (0)
See Also
Categories
Find more on Arduino Hardware in Help Center and File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!