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Whats the value of FLT_EPSILON

BackgroundSubtractor

asked 2014-01-28 08:04:10 -0600

AdityaSastry
6 ●3

What is the value of this constant in the background segmentation using Mixture of gaussians file in the video module's section. I tried grep in that directory but it resulted in nothing. I just find it curious why something so related to the file is not placed in that directory !

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answered 2014-01-28 08:28:55 -0600

flag of Australia

1000 ●5 ●16

updated 2014-01-28 08:31:11 -0600

On Linux, in /usr/lib/gcc/x86_64-linux-gnu/4.8/include/float.h it has

#define FLT_EPSILON __FLT_EPSILON__

However if you try to grep for __FLT_EPSILON__ you won't find anything. Somehow gcc just knows.

cout << FLT_EPSILON << endl;

returns

1.19209e-07

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http://www.opensource.apple.com/source/Libc/Libc-498/include/float.h has #define __FLT_EPSILON__ 1.19209290e-07F

claw ( 2014-11-29 18:33:38 -0600 )edit

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Asked: 2014-01-28 08:04:10 -0600

Seen: 3,838 times

Last updated: Jan 28 '14

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