How to overlay Plot on top of image

[dmh43]

I have an array describing each of the X, Y and Z values of each point I want to plot in a scatterplot with an image as the background. Ideally, each point will be translucent according to it's Z value (although something continuous like the Intensity Graph would also be fine). I had some success using a simplge graph control with an image as the background, however, the data I want to plot is 3D, the graph control will not vary the transparency (or color) of the data points based off a third value.

I'd like the graph to show each discrete value rather than a continuous spectrum.

Any Ideas how to do this?

Thanks!

[Hatef.fouladi]

if you could work with gray scale image I can tell you two method to do that
but for rgb image
I just could do it in Image J software but not in labview yet