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MATLAB Central > MATLAB Newsreader > how to calculate variance of image histogram? 

Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 28 Oct, 2011 06:55:30 Message: 1 of 22 
HELLO; 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 29 Oct, 2011 14:04:14 Message: 2 of 22 
"Mohd Farhan " <farhan7787@gmail.com> wrote in message <j8djl2$704$1@newscl01ah.mathworks.com>... 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 29 Oct, 2011 14:05:20 Message: 3 of 22 
"Mohd Farhan " <farhan7787@gmail.com> wrote in message <j8djl2$704$1@newscl01ah.mathworks.com>... 
Subject: how to calculate variance of image histogram? From: ImageAnalyst Date: 29 Oct, 2011 15:57:57 Message: 4 of 22 
That's just the regular histogram. And I think you want the variance 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 30 Oct, 2011 10:54:08 Message: 5 of 22 
ImageAnalyst <imageanalyst@mailinator.com> wrote in message <43d64d1adcc1412187678960f88c885d@g21g2000yqc.googlegroups.com>... 
Subject: how to calculate variance of image histogram? From: ImageAnalyst Date: 30 Oct, 2011 13:44:30 Message: 6 of 22 
The web page you gave talked about the variance of the image and 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 31 Oct, 2011 08:42:10 Message: 7 of 22 
ImageAnalyst <imageanalyst@mailinator.com> wrote in message <a384766e4c264a7b9961fdb73343b90a@ek5g2000vbb.googlegroups.com>... 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 1 Nov, 2011 09:34:28 Message: 8 of 22 
my above problem is almost solved. thanks for ur replies. 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 1 Nov, 2011 12:01:11 Message: 9 of 22 
ImageAnalyst <imageanalyst@mailinator.com> wrote in message <a384766e4c264a7b9961fdb73343b90a@ek5g2000vbb.googlegroups.com>... 
Subject: how to calculate variance of image histogram? From: ImageAnalyst Date: 1 Nov, 2011 21:01:42 Message: 10 of 22 
On Nov 1, 8:01 am, "Mohd Farhan " <farhan7...@gmail.com> wrote: 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 2 Nov, 2011 06:23:14 Message: 11 of 22 
ImageAnalyst <imageanalyst@mailinator.com> wrote in message <ac859295c3854cd6a47d6463e7b9bed5@o19g2000vbk.googlegroups.com>... 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 3 Nov, 2011 07:16:13 Message: 12 of 22 
refer: http://www.labbookpages.co.uk/software/imgProc/otsuThreshold.html 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 3 Nov, 2011 13:23:11 Message: 13 of 22 
"Mohd Farhan " <farhan7787@gmail.com> wrote in message <j8tf3t$ddl$1@newscl01ah.mathworks.com>... 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 3 Nov, 2011 14:55:27 Message: 14 of 22 
let a image of 256x256. 
Subject: how to calculate variance of image histogram? From: ImageAnalyst Date: 3 Nov, 2011 23:42:03 Message: 15 of 22 
On Nov 3, 10:55 am, "Mohd Farhan " <farhan7...@gmail.com> wrote: 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 4 Nov, 2011 13:00:20 Message: 16 of 22 
ImageAnalyst <imageanalyst@mailinator.com> wrote in message <a932bd34c6b74e0dbb5907509063d0bd@9g2000yqv.googlegroups.com>... 
Subject: how to calculate variance of image histogram? From: ImageAnalyst Date: 4 Nov, 2011 19:58:41 Message: 17 of 22 
Well the page tells you so just follow the example: 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 5 Nov, 2011 13:09:29 Message: 18 of 22 
ImageAnalyst <imageanalyst@mailinator.com> wrote in message <1c31528db2114be9bfbdce6b8e1f5fc4@u28g2000yqb.googlegroups.com>... 
Subject: how to calculate variance of image histogram? From: ImageAnalyst Date: 5 Nov, 2011 15:14:24 Message: 19 of 22 
On Nov 5, 9:09 am, "Mohd Farhan " <farhan7...@gmail.com> wrote: 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 5 Nov, 2011 15:30:29 Message: 20 of 22 
ImageAnalyst <imageanalyst@mailinator.com> wrote in message <349469fe50904eae81378696ec1101bd@o19g2000vbk.googlegroups.com>... 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 5 Nov, 2011 15:39:27 Message: 21 of 22 
actually what i am in need is that, a loop type of thing which automatically sets a threshold value (from 0 to 255) [& therefore divides histogram in two grounds], & give us output value as WITHIN CLASS VARIANCE. So that i can compare the result of minimum & maximum values. 
Subject: how to calculate variance of image histogram? From: Mohd Farhan Date: 6 Nov, 2011 05:07:13 Message: 22 of 22 
please help me. 
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