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contrast enhancement [message #93592] Wed, 31 August 2016 03:55 Go to next message
gunvicsin11 is currently offline  gunvicsin11
Messages: 93
Registered: November 2012
Member
hello all,
I want contrast enhancement in order to identify features in solar images. So i used histogram equalisation (hist_equal.pro). But it is not proper for the features near the limb.

So do anybody used any other contrast enhancement methods.
thanks

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Re: contrast enhancement [message #93593 is a reply to message #93592] Wed, 31 August 2016 06:31 Go to previous messageGo to next message
Helder Marchetto is currently offline  Helder Marchetto
Messages: 520
Registered: November 2011
Senior Member
On Wednesday, August 31, 2016 at 12:55:52 PM UTC+2, sin wrote:
> hello all,
> I want contrast enhancement in order to identify features in solar images. So i used histogram equalisation (hist_equal.pro). But it is not proper for the features near the limb.
>
> So do anybody used any other contrast enhancement methods.
> thanks

Hi,
I don't know about solar images, but here you find loads of options:
http://www.idlcoyote.com/ip_tips/xstretch.php

Good reference.

Cheers, Helder

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Re: contrast enhancement [message #93604 is a reply to message #93593] Thu, 01 September 2016 21:12 Go to previous message
gunvicsin11 is currently offline  gunvicsin11
Messages: 93
Registered: November 2012
Member
On Wednesday, August 31, 2016 at 7:01:37 PM UTC+5:30, Helder wrote:
> On Wednesday, August 31, 2016 at 12:55:52 PM UTC+2, sin wrote:
>> hello all,
>> I want contrast enhancement in order to identify features in solar images. So i used histogram equalisation (hist_equal.pro). But it is not proper for the features near the limb.
>>
>> So do anybody used any other contrast enhancement methods.
>> thanks
>
> Hi,
> I don't know about solar images, but here you find loads of options:
> http://www.idlcoyote.com/ip_tips/xstretch.php
>
> Good reference.
>
> Cheers, Helder

thanks a lot helder, it was of great help.

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