Re: [Gimp-user] Re: Separating objects from the background
On Wed, Apr 10, 2002 at 04:03:45PM -0500, Walker, Sam wrote: > This is a tough task that sounds simple. > > I would use Fuzzy Select tool on the background, playing with the threshold > until the selection looked good. Then invert the selection, and use > /Select/Shrink to unselect any extra background artifacts around the > edges. > You can try the feather and antialias options with the select to blur the > edges of your selection. > > You might try the edge detect filters. Then using the Image/Colors/Levels > tools to isolate the strong edges. Then use the resulting image with the > Fuzzy Select or as a mask/channel. > > Either way some hand editting is involved. I doubt there is a quick and > easy technique. If there is, I'd sure be interested to know how. > As would I. We deal with pictures of glass art. We make the background black. The clear glass on the outside of curves is hard to preserve while completely eliminating the background. Maybe I haven't played with the edge detect filters enough ... -- <[EMAIL PROTECTED]> ___ Gimp-user mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user
RE: [Gimp-user] Re: Separating objects from the background
This is a tough task that sounds simple. I would use Fuzzy Select tool on the background, playing with the threshold until the selection looked good. Then invert the selection, and use /Select/Shrink to unselect any extra background artifacts around the edges. You can try the feather and antialias options with the select to blur the edges of your selection. You might try the edge detect filters. Then using the Image/Colors/Levels tools to isolate the strong edges. Then use the resulting image with the Fuzzy Select or as a mask/channel. Either way some hand editting is involved. I doubt there is a quick and easy technique. If there is, I'd sure be interested to know how. Regards, Sam -Original Message- From: Nikolai Vladychevski [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 10, 2002 12:31 PM To: Cruz, John J Cc: [EMAIL PROTECTED] Subject: [Gimp-user] Re: Separating objects from the background Cruz, John J writes: > Have you tried installing a border around the object of a color of your > choosing and making certain that the border is up-front? > > jjc but the problem is I have not object yet to produce its border. The oval was just an example, I have a lot of photos of products here and all have background that I want to remove cleanly and fast, without doing pixel-by-pixel art ... > > -Original Message- > From: Nikolai Vladychevski [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, April 10, 2002 12:15 PM > To: [EMAIL PROTECTED] > Subject: [Gimp-user] Separating objects from the background > > > > Hello, > > I will have to redesign a site (shopping site) with white background color > and since the actual site uses photos of the product with the some > backgrounds (black, gray ... all monotone colors) I will have to remove it > and I don't know how to do this properly. > > Lets say I have an example like this, an yellow oval shape over purple > background: > > http://www.isl.net.mx/paso1.gif > > This object has an antialiased border to integrate smootely with the > background. > > If I remove the background using selection tools in Gimp I will get a result > > like this: > > http://www.isl.net.mx/paso2.gif > > Wich is the result of antialiasing effect, and if I remove the purple color, > > there is no way to remove it completely, some of it will stay: > > http://www.isl.net.mx/paso3.gif > > > I investigated and found that antialising effect changes Alpha values of the > > pixels, so if I place any background backward, the object will adapt to the > background smoothely. Unfortunately, I already have background on my photos > and the object together in the image and I need to do the reverse, I have to > > separate the object from the background, so I need to do something with the > alpha values of the border pixels, right now they are equal to 255: > > http://www.isl.net.mx/paso4.gif > > How can I do with gimp to remove the purple color fully and convert the > borders where the object is merging with the background into pixels that has > > Alpha values over yellow color instead of plain orange color ? > > Thanks in advance. > Nikolai > ___ > Gimp-user mailing list > [EMAIL PROTECTED] > http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user ___ Gimp-user mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user ___ Gimp-user mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user
[Gimp-user] RE: Separating objects from the background
You might have to write a script. -Original Message- From: Nikolai Vladychevski [mailto:[EMAIL PROTECTED]] Sent: Wednesday, April 10, 2002 1:31 PM To: Cruz, John J Cc: [EMAIL PROTECTED] Subject: Re: Separating objects from the background Cruz, John J writes: > Have you tried installing a border around the object of a color of your > choosing and making certain that the border is up-front? > > jjc but the problem is I have not object yet to produce its border. The oval was just an example, I have a lot of photos of products here and all have background that I want to remove cleanly and fast, without doing pixel-by-pixel art ... > > -Original Message- > From: Nikolai Vladychevski [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, April 10, 2002 12:15 PM > To: [EMAIL PROTECTED] > Subject: [Gimp-user] Separating objects from the background > > > > Hello, > > I will have to redesign a site (shopping site) with white background color > and since the actual site uses photos of the product with the some > backgrounds (black, gray ... all monotone colors) I will have to remove it > and I don't know how to do this properly. > > Lets say I have an example like this, an yellow oval shape over purple > background: > > http://www.isl.net.mx/paso1.gif > > This object has an antialiased border to integrate smootely with the > background. > > If I remove the background using selection tools in Gimp I will get a result > > like this: > > http://www.isl.net.mx/paso2.gif > > Wich is the result of antialiasing effect, and if I remove the purple color, > > there is no way to remove it completely, some of it will stay: > > http://www.isl.net.mx/paso3.gif > > > I investigated and found that antialising effect changes Alpha values of the > > pixels, so if I place any background backward, the object will adapt to the > background smoothely. Unfortunately, I already have background on my photos > and the object together in the image and I need to do the reverse, I have to > > separate the object from the background, so I need to do something with the > alpha values of the border pixels, right now they are equal to 255: > > http://www.isl.net.mx/paso4.gif > > How can I do with gimp to remove the purple color fully and convert the > borders where the object is merging with the background into pixels that has > > Alpha values over yellow color instead of plain orange color ? > > Thanks in advance. > Nikolai > ___ > Gimp-user mailing list > [EMAIL PROTECTED] > http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user ___ Gimp-user mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user
[Gimp-user] Re: Separating objects from the background
Cruz, John J writes: > Have you tried installing a border around the object of a color of your > choosing and making certain that the border is up-front? > > jjc but the problem is I have not object yet to produce its border. The oval was just an example, I have a lot of photos of products here and all have background that I want to remove cleanly and fast, without doing pixel-by-pixel art ... > > -Original Message- > From: Nikolai Vladychevski [mailto:[EMAIL PROTECTED]] > Sent: Wednesday, April 10, 2002 12:15 PM > To: [EMAIL PROTECTED] > Subject: [Gimp-user] Separating objects from the background > > > > Hello, > > I will have to redesign a site (shopping site) with white background color > and since the actual site uses photos of the product with the some > backgrounds (black, gray ... all monotone colors) I will have to remove it > and I don't know how to do this properly. > > Lets say I have an example like this, an yellow oval shape over purple > background: > > http://www.isl.net.mx/paso1.gif > > This object has an antialiased border to integrate smootely with the > background. > > If I remove the background using selection tools in Gimp I will get a result > > like this: > > http://www.isl.net.mx/paso2.gif > > Wich is the result of antialiasing effect, and if I remove the purple color, > > there is no way to remove it completely, some of it will stay: > > http://www.isl.net.mx/paso3.gif > > > I investigated and found that antialising effect changes Alpha values of the > > pixels, so if I place any background backward, the object will adapt to the > background smoothely. Unfortunately, I already have background on my photos > and the object together in the image and I need to do the reverse, I have to > > separate the object from the background, so I need to do something with the > alpha values of the border pixels, right now they are equal to 255: > > http://www.isl.net.mx/paso4.gif > > How can I do with gimp to remove the purple color fully and convert the > borders where the object is merging with the background into pixels that has > > Alpha values over yellow color instead of plain orange color ? > > Thanks in advance. > Nikolai > ___ > Gimp-user mailing list > [EMAIL PROTECTED] > http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user ___ Gimp-user mailing list [EMAIL PROTECTED] http://lists.xcf.berkeley.edu/mailman/listinfo/gimp-user
