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How to convert RGB image into a binary image ? [message #87411]

Fri, 31 January 2014 15:22

msbstar
Messages: 3
Registered: January 2014

Junior Member

Hi everybody,

I need to convert a RGB image into a binary format image. I would be grateful if any one could help me.

With best regards,
Hassan

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Re: How to convert RGB image into a binary image ? [message #87412 is a reply to message #87411]

Fri, 31 January 2014 15:27

David Fanning
Messages: 11724
Registered: August 2001

Senior Member

msbstar writes:

> I need to convert a RGB image into a binary format image. I would be grateful if any one could help me.

An RGB image *is* a binary format image. What exactly are you trying to
do? What do you imagine a binary format image is?

Cheers,

David

--
David Fanning, Ph.D.
Fanning Software Consulting, Inc.
Coyote's Guide to IDL Programming: http://www.idlcoyote.com/
Sepore ma de ni thue. ("Perhaps thou speakest truth.")

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Re: How to convert RGB image into a binary image ? [message #87414 is a reply to message #87411]

Fri, 31 January 2014 17:58

dg86
Messages: 118
Registered: September 2012

Senior Member

On Friday, January 31, 2014 6:22:07 PM UTC-5, Hassan wrote:
> Hi everybody,
>
>
>
> I need to convert a RGB image into a binary format image. I would be grateful if any one could help me.
>
>
>
> With best regards,
>
> Hassan

I'm guessing that you want to threshold the image's intensity. If, so, then you can use COLOR_CONVERT to transform your RGB image into an HSV image. The V channel is the intensity, to which you can apply a threshold. For instance, if A is your RGB image and THRESHOLD is your threshold value, then

IDL> color_convert, a, b, /rgb_hsv
IDL> intensity = reform(b[2,*,*]) ; V = intensity
IDL> result = intensity gt threshold

All the best,

David

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