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OpenCV RNG and seeding

asked 2016-12-02 17:13:47 -0600

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Hi everyone

I am trying to convert these lines of Matlab code to Java using OpenCV 3.1:

for i=1:1:height // height = 196
   rng(signatureShift(i)); // 196x1 Mat containing int values from 0 to 10
   keySequence(i,:)=rand(1,width); // generates double values between 0 and 1
   keySequence(i,:)=round(keySequence(i,:)); // rounds the generated double values

Can someone give me some pointers on how to accomplish this using the OpenCV library?

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I see I should probably use RNG rng(signatureShift(i)) to seed. What imports do I need in Java OpenCV 3.1 for the RNG class, because I can't seem to find it :(

phillity ( 2016-12-02 17:35:48 -0600 )edit

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answered 2016-12-03 00:32:46 -0600

berak
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updated 2016-12-03 01:29:56 -0600

unfortunately opencv's java bindings do not have a RNG class.

you can use randn() , randu(), randShuffle(), etc

(which are all using the global cv::theRNG() under the hood),

but there will be no way of actually seeding it (default seed is 0xffffffff)

you'll probably have to use java's own Random class here instead.

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Thanks, that's what I ended up doing

phillity ( 2016-12-03 17:04:01 -0600 )edit

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Asked: 2016-12-02 17:13:47 -0600

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Last updated: Dec 03 '16

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