Stroke does not work on a BW image
I have a BW image where I need to get a contour only. First I would like to create a contour of a different color so that I could change black to white on the next step. Googling the problem, it looks like using Stroke is the answer. For some reason, the stroke is created for the whole sheet border, not for the image.
To reproduce, take any nice BW Disney image:
Copy
In Photoshop, create new, Color Mode: RGB
Paste
Layers | merge visible
Unlock layer
Layer | blending options
Enable stroke
Position: inside
Move size slider and the stroke applies to the sheet border.
Position: outside does not help
