Removing single color shadow / White to transparent

[Cmars]

Well I'm trying to add a remove shadow on my bot but I can't seem to get it right (like always)
Image:

Close up:


Also, removing the white transparent out interrupting the image (if has white inside the image)
Thank's for reading.

[fmw42]

Your alpha channel is totally white. So no transparency anywhere. You need to make a (b/w or grayscale) mask to cut out the parts you don't want and then overlay that on your base image.

[anthony]

I would start by turning white into a masking image. then mody that mask by removing any pixel that is down and left of another pixel in the mask! that will remove the 'shadow'

Hmmm...
First the mask...

Code: Select all

  convert image.png -negate -threshold 0 mask.png

now get rid of the shadow

Code: Select all

  convert mask.png \( +clone -roll -1-1 \) -compose multiply -composite mask2.png

and apply mask to image

Code: Select all

  convert image.png mask2.png -alpha off -compose CopyOpacity -composite  result.png

there you go, masked and a one pixel shadow removed.

[Cmars]

Thank you anthony