Hi

Perhaps you can do it by selecting the option "Select by Color" and manipulating the threshold - perhaps increasing it.

Best regards

Asif

Date: Mon, 28 Mar 2005 14:53:08 -0500 (EST) From: Sebastien Cabot
To: gimp-user@lists.xcf.berkeley.edu Subject: Re: [Gimp-user] How to select isolated pixels ?

Sebastien Cabot writes:

I have a black & white image of a texte document, I would like to eliminated the isolated pixel (small group of 1 to 5 pixels in the white area of the page) to keep only the black text.

--- Sven Neumann wrote:

Despeckle should be able to do that, give it a try.

Thanks, I didn't knew about despeckle. Unfortunatly this plug-in in addition to remove the isolated pixels also remove some pixels of the non isolated one (letter contour). This is exactly what I'm trying to avoid. I must remember I have a monocrome image (2-bit) which greatly reduce plug-in option like despeckle.

Utitimatly what I need, is after a selection of all the black pixels, find a way to remove from it all area made of more than 5 contiguous pixels. The remaning areas of 5 or less pixels will be the small dots I want to remove.

Anyone have a suggestion how I can modify my black pixels selection in such a way ?

Hi

Perhaps you can do it by first enclosing the image section you want to manipulate using the freeform selection tool and then selecting the option/tool "Select by Color" and manipulating the threshold - perhaps increasing it.

Best regards

Asif

Date: Mon, 28 Mar 2005 14:53:08 -0500 (EST) From: Sebastien Cabot
To: gimp-user@lists.xcf.berkeley.edu Subject: Re: [Gimp-user] How to select isolated pixels ?

Sebastien Cabot writes:

I have a black & white image of a texte document, I would like to eliminated the isolated pixel (small group of 1 to 5 pixels in the white area of the page) to keep only the black text.

--- Sven Neumann wrote:

Despeckle should be able to do that, give it a try.

Thanks, I didn't knew about despeckle. Unfortunatly this plug-in in addition to remove the isolated pixels also remove some pixels of the non isolated one (letter contour). This is exactly what I'm trying to avoid. I must remember I have a monocrome image (2-bit) which greatly reduce plug-in option like despeckle.

Utitimatly what I need, is after a selection of all the black pixels, find a way to remove from it all area made of more than 5 contiguous pixels. The remaning areas of 5 or less pixels will be the small dots I want to remove.

Anyone have a suggestion how I can modify my black pixels selection in such a way ?

Hi

IMHO perhaps you can do it by :

1) converting your image to RGB. 2) selecting the area(s) you want to manipulate using the free selection tool
3) using the "Select by Color" tool and manipulating (perhap increasing) the threshold.
4) converting the image back to the original mode.

Best regards

Asif

Date: Mon, 28 Mar 2005 14:53:08 -0500 (EST) From: Sebastien Cabot
To: gimp-user@lists.xcf.berkeley.edu Subject: Re: [Gimp-user] How to select isolated pixels ? Message-ID:
....

Sebastien Cabot writes:

I have a black & white image of a texte document, I would like to eliminated the isolated pixel (small group of 1 to 5 pixels in the white area of the page) to keep only the black text.

--- Sven Neumann wrote:

Despeckle should be able to do that, give it a try.

Thanks, I didn't knew about despeckle. Unfortunatly this plug-in in addition to remove the isolated pixels also remove some pixels of the non isolated one (letter contour). This is exactly what I'm trying to avoid. I must remember I have a monocrome image (2-bit) which greatly reduce plug-in option like despeckle.

Utitimatly what I need, is after a selection of all the black pixels, find a way to remove from it all area made of more than 5 contiguous pixels. The remaning areas of 5 or less pixels will be the small dots I want to remove.

Anyone have a suggestion how I can modify my black pixels selection in such a way ?