How to noise dataimage store with a specific portion of an external image?

I have a dataimage store and want to noise its images by an external image. However, not use the whole new image, instead use various portions of it

Answer 1

[Divya Gaddipati]

You can use tranform datastore function for this purpose. This allows you to write a custom function specifying how you would like to modify your data.

dsnew = transform(imds, @(inp) custom_fcn(inp, external_image));