How to fix interp2() error?

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layal alsini
layal alsini 2019-4-12
编辑： KSSV 2019-4-14
I need to sample and recostract an image using interp2() function, by two methods 'linear' and 'nearest'
I have tried the code below with the method 'nearest' and it works well.
image = imread('Image1.bmp','bmp');
V = image(1:3:end,1:3:end);
Vq = interp2(V,2);
but when I tried the method 'linear', it didn't work with the error massage
Error using griddedInterpolant
Sample values must be a single or double array.
Error in interpn (line 125)
F = griddedInterpolant(X,V,method,extrap);
Error in Sampling (line 14)
Vq = interpn(V,2);
How I can fix this Error??

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回答（1 个）

KSSV
KSSV 2019-4-12
image = imread('Image1.bmp','bmp');
image = double(image) ;
V = image(1:3:end,1:3:end);
Vq = interp2(V,2);
  2 个评论
layal alsini
layal alsini 2019-4-14
thax for your answer
I tried to change it into duoble .. but the output is a blank white picture !!!
KSSV
KSSV 2019-4-14
编辑：KSSV 2019-4-14
After interpolation before plotting....
image=uint8(image);

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