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How can i use interp1 to enlarge the photo 'lena'

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Dingbang Liang
Dingbang Liang 2018-5-24
评论： Image Analyst 2018-5-24
I have a image which is lena_half, 256*256*3, how can I use interp1 to enlarge it?
What I have done so far, but not working: %%
lena = double(imread('lena.tif'));
figure(6);
imshow(lena)
y_LenaHalf = double(imread('lena_half.tif'));
figure(7);
imshow(y_LenaHalf)
x2 = 1:256;
xi_2 = 1:(255/511):256;
yi_2 = interp1(x2, y_LenaHalf, xi_2);
yi2_2 = interp1(x2, yi_2.', xi_2).';
yii_2 = interp1(yi2_2, yi2.', xi_2);
figure(8);
imshow(uint8(yii_2))
SE2 = (lena - yii_2).^2;
MSE2 = mean(mean(SE2));
Also, there is an error: Error using .' Transpose on ND array is not defined. Use PERMUTE instead.

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KSSV
KSSV 2018-5-24
  5 个评论
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KSSV
KSSV 2018-5-24
I already mentioned there...it does interpolation along one dimension..you need to run another loop along column.....also...
Image Analyst
Image Analyst 2018-5-24
Why? What are you not simply using imresize()? Why do it the hard way? Is it your homework that's forcing you to do it the least convenient way?

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