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I want my android app to recognise millions of images. So i want to know if openCv is a choice for this solution. I want an image to be compared against a huge ( millions ) of reference images and find if any matches . Is this can be achieved with efficiency when opencv is used

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    Computations of that scale probably better done on a server and the results returned to the client. Commented Mar 24, 2013 at 8:01

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Depending upon the algorithm you're using the time varies.

Here's something about what you're asking. As Tushar stated it's better to do these computations on a server and return the results rather than on the client device. Although the code I'm going to post below showed tremendous speed on a Galaxy SIII.

Also, if you'd like some sample code, take a look here.

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