Adding background image with set opacity / Having two overlapping background images #32
Description
I'm trying to use Dash canvas to do some radiographic film analysis. I first create a Dash canvas with the film image as a background. I then typically draw a line with the line tool and extract the profile from the background image along that line.
I would like to overlap two similar images with, for example, half opacity for each, as one single background and when I draw the line and extract the profile, I would get two profiles. This is useful for comparing profiles from two films while ensuring positional matching (by overlapping them and adjusting the position of one relative to the other).
Could this be an implemented feature? Should I try combining the two images outside of the canvas and then using the combined data as background? This wouldn't allow me to move them relative to each other inside the canvas, unfortunately.