This might help someone else. I am also writing this so I remember it. This procedure makes a flat photoshop document with all white removed as if the document were a layer with blend type "Multiply". You can then paint white behind it to make non-translucent sections for overlaying with other things (in other programs or web stuff), but the edges will be perfect with no loss of detail.
Done. If you need to, make a new layer under, and paint white to make any sections you want opaque.
Reading your steps I would think that step 11 the Ctrl+Shift+I invert would pop up a message that no pixels were selected. for the Ctrl+Clicking the Alpha channels should select all pixels since all were filled with white. If your original new documwnt had a white background. For the Red. Green and Blue channels would be all white.
Hi JJMack. Thanks for the comment. Perhaps I should have more clearly stated in step 1 that you should open a document containing an image with a white background, from which you would like to drop all the white. AT the completion of the process, your document should look something like this....
Looks like you loose white inside your subject as well. There are plug-ins like "Kill white" that will also do that also without all the layers.. You could also automate your process using Photoshop action support, Then your memory just need to remember the action name and where you store the action. The action may also generate some warning massages about the number of pixels selected. Since I do use Kill White Plug-in once in a while and it only a 32bit Plug-in I recorded your solution into an action however I merged your three layers into a layer name Kill White. So I can use it the Photoshop 64 bit version. However complex edges will have bleed for the white will not be 100% white in the fringe areas.
Trying to use for an extraction still produces bleed in the fring areas
Adding a new background replacement on top add a mask to that the cutsmask some hair and the the fring, Hair can be recovered by change the replament layer blending mode to multiply for the original white background will change nothing but the hair masked off will blend in and darken composite. The white fringe will not darken the composite.
Message was edited by: JJMack
If you want the actions I created you can download then here. I use a script in a couple so I included it in the zip file. I failed to post the link yesterday there was a problem on my web host service,
Hey jjmack, I am left with a transparent background...how do I fill in the background with white after funning this script
Thank you so much for taking the time to write detailed instructions which were easy to follow. The steps worked perfectly and I get to keep my eyesight!
Simple but effective. Great advice, thank you
Utterly works, perfectly! Thank you so much