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torch / cutorch

A CUDA backend for Torch7
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How to use the 'fex' package in torch ? #426

Closed xiestone1992 closed 8 years ago

xiestone1992 commented 8 years ago

I spent a lot of time to find out how to use the 'fex' package but no one can clearly tell me.

I saw Github wiki https://github.com/torch/torch7/wiki/Cheatsheet , the 'fex' page https://github.com/koraykv/fex , but I found nothing useful.

In the 'fex' page, There is only a simple example:

Feature Extractor Library for Torch7

To use SIFT feature extractor lena = fex.lena() slena = fex.dsift(lena)

I tried it and the result is not what I expect.

I want to use SIFT or other feature detection method to find out the object contour but not object detection.

Can anyone tell me how to use the 'fex' package to detect feature points in an image?

THANKS FOR READING

xiestone1992 commented 8 years ago

@soumith

Can you explain the function " fex.imshow(im,params) " to me ?

I don't understand the meaning of 'params'.

What 's 'params'? What kind of data is it? What is its function?

fmassa commented 8 years ago

@xiestone1992 this kind of question is better suited for the Google Groups https://groups.google.com/forum/#!forum/torch7 For this particular problem, fex main function is dsift, which computes dense sifts over the image, and the package doesn't do much more. The fex.imshow is an early version of image.display, but with less options. If you want to do some image processing in torch. try torch-opencv.