CODEWITHSUNDEEP
opencvcomputer-visionsiftvlfeat
justHelloWorld
justHelloWorld

Reputation: 6842

What is the best format for using SIFT?

Is there any difference in terms of precision and speed in using SIFT with JPEG, PNG or PGM images? Obviously supposing the same image size.

Upvotes: 0

Views: 307

Answers (1)

Piglet
Piglet

Reputation: 28974

This question does not make sense. SIFT is an algorithm, it operates on raw pixel data in memory, not on files. You would need some framework that loads image files into some data structure in memroy.

SIFT itself doesn't care if you load a jpeg or a pgm. It will never know where the pixels came from.

Having the same size (to 1 bit) for the same image in three different formats would be pretty impossible in my opinion. As PGM is uncompressed this would also mean that JPEG and PNG would have to be uncompressed to have roughly the same size. If you have no compression you have no losses. So there would be no difference in SIFT performance.

Upvotes: 2

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