how to find the height of a signature
in [Matlab]
|
Prev: Incorporate both measurement noise and system disturbance in idmodel object.
Next: how to get random sequence from pulse generator in sample based pulse type
From: Roshan Rajaratnam on 13 May 2010 23:02 ImageAnalyst <imageanalyst(a)mailinator.com> wrote in message <48f991dc-aba6-4121-bdfa-1c987dc646c9(a)k17g2000yqf.googlegroups.com>... > On May 13, 10:23 pm, "Roshan Rajaratnam" > > what do u mean by the threshold value in this example? can someone help me in this please? > ------------------------------------------------------------- > It's just an intensity value that divides the background from the > foreground. Just use plot() to plot the vertical profile and you'll > see what I mean. It will be bright (high,say 200 gray levels) for all > rows except where there is a signature where the profile will be > darker, say only 150 or so. So the threshold might be 175. i used the plot function after summing the vertical profile it went high upto 1178 starting from 352. therefore what do u think is good? im a lil confused thanx
From: Roshan Rajaratnam on 13 May 2010 23:03 ImageAnalyst <imageanalyst(a)mailinator.com> wrote in message <48f991dc-aba6-4121-bdfa-1c987dc646c9(a)k17g2000yqf.googlegroups.com>... > On May 13, 10:23 pm, "Roshan Rajaratnam" > > what do u mean by the threshold value in this example? can someone help me in this please? > ------------------------------------------------------------- > It's just an intensity value that divides the background from the > foreground. Just use plot() to plot the vertical profile and you'll > see what I mean. It will be bright (high,say 200 gray levels) for all > rows except where there is a signature where the profile will be > darker, say only 150 or so. So the threshold might be 175. pardon me from 1164 to 1178
From: ImageAnalyst on 14 May 2010 06:30 Why don't you just try some and see how it goes? Or read the image into some software that has a more interactive thresholding method, like Photoshop?
From: Roshan Rajaratnam on 14 May 2010 08:05 ImageAnalyst <imageanalyst(a)mailinator.com> wrote in message <30632f96-6364-479f-9891-0b17dd4632b9(a)d27g2000yqc.googlegroups.com>... > Why don't you just try some and see how it goes? Or read the image > into some software that has a more interactive thresholding method, > like Photoshop? so what about the threshold value for all types of signatures? please help me im really in need of this thanx
From: Sean on 14 May 2010 08:14
"Roshan Rajaratnam" <rajaratnam_roshan(a)yahoo.com> wrote in message > > so what about the threshold value for all types of signatures? please help me im really in need of this > thanx Between 9 and pi^2. |