CODEWITHSUNDEEP
matlab
Echo
Echo

Reputation: 685

matlab what is the difference between imresize and interp2

I have an image that I want to make the width and length both twice of the original size (means 4 times the original area). I was using imresize(X,2) but I was told I should use interp2 instead.

I know imresize uses bicubic interpolation by default and there are other options. So what is the difference between imresize and interp2?

Upvotes: 3

Views: 1474

Answers (1)

Dan
Dan

Reputation: 45752

imresize takes different inputs from interp2. With interp2 you cannot specify a simple multiplication factor that you want to scale your image by the way you can with imresize. interp2 does 2D interpolation and instead of a scale input you need to provide it with the x-y coordinates of the points between the pixels that you want to interpolate. imresize uses interpolation internally, but it it does a fair amount of other processing and calculations beforehand. imresize also allows you to shrink your image which is not quite as straightforward using just interp2. Internally they will use the same maths, imresize just makes the task of resizing an image easier for you.

Upvotes: 4

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