Matlab-how can I use SSIM function using sprintf function

Question

Now I'm researching on Image processing about interpolation. So I invented my new interpolation algorithms about image.

And I have to check SSIM value about my images that are interpolated by my interpolation algorithms.

Now I'm using ICY tool (On windows, GUI environment) but this tool is too hard to check large amount of images because of GUI interface.

So I want to check image SSIM value using matlab ssim function.

but I'm not a expert in matlab language, so I'm in trouble in dealing with import various name to ssim function.

This is what I want to do:

1. I want to checks ssim value with a large amount of images.
2. So I'm going to use sprintf function to make a valuable image name.
3. The third I want to import this input image name to ssim function.

This is the code I used.

for n= 1 : 10
str = sprintf('./x2/cutted/x2_fn%d_4p_3p_cutted.bmp',n);
str_ori = sprintf('ori_%d.bmp',n);

img_cutted=imread(str);
img_ori=(str_ori);

[ssimval,ssimmap]=ssim(str,str_ori);
end

When I use this code, the error is invoked.

Error: The str must be the types of uint8, uint16, int16, single, double. but you used char value.

After I got this message, write "uint8 str;" but still the message is invoked.

Answer 1

ssim gets 2 images as input, not 2 strings. replace your code by [ssimval,ssimmap]=ssim(img,img_ori);