Image sampler: assigning values according to a known gradient.

Hi guys,

I ran a debris flow simulation in RAMMS, then exported the image as a jpeg. I know the gradient values. Although I would like to assign values to the various RGB according to the gradient. I can't get my head around it.Any help would be appreciated. Refer images.

Attachments:

Debris flow.png, 1.1 MB
image.jpg, 2.9 MB

Replies to This Discussion

Permalink Reply by Aditya Tognatta on November 2, 2016 at 11:55pm

Anyone guys?

Permalink Reply by Laurent DELRIEU on November 3, 2016 at 12:30am

I am not sure it will work but sets could be useful
Create a set with your gradient but perphas it will be difficult to know how many color is in there
So for each color you coul get an index to 0 to the number of color -1
Extract the color of the image you want to analyses and use members index
The remap the index with the physical range
Hope it helps a bit

Permalink Reply by David Rutten on November 3, 2016 at 2:11am

Yeah it's been asked before and I uploaded a solution using Find Similar I think. Works well enough as long as the gradient you sample doesn't use a colour more than once.

I'll see if I can find that post, but intense googling is difficult on an iPad...

Permalink Reply by David Rutten on November 3, 2016 at 2:12am

http://www.grasshopper3d.com/forum/topics/populate-by-gradient-rgb

Permalink Reply by Aditya Tognatta on November 3, 2016 at 5:57am

Thanks David,

I will try if this approach works in my case( it should actually). Anyways, appreciate it.

Permalink Reply by Aditya Tognatta on November 3, 2016 at 8:47am

Thanks David, with a better understanding of how the image sampler works I was not only able to assign the values but regenerate the image on the target surface.