I am new to Firefly and this my first test drive. I use Firefly because I need to image sample a batch of png files. The regular GH “Image Sampler” does not provide an input for path. Firefly does the job, except for one issue caused by a workaround:
I encounter a problem with reading RGB and Alpha values from png files.
Since “Bitmap Sampler” doesn’t return Alpha values, I went for a workaround:
“Recompose image” with Alpha mapped to R
“Split ARGB” (GH) to extract R (now representing the Alpha values)
This works fine until I try to feed a stack of several .png file through this algorithm using a grafted list of file paths.
While the RGB sampling works like a charm, the Alpha workaround delivers only identical values for different png files.
I think I have narrowed the issue down to the “Recompose image” component.
Are there known issues with “Recompose image” regarding paths / data structures?
I prepared a file to exemplify the issue:
Maybe I am missing the obvious or am just too tired…
Any hints on:
- how to avoid the workaround in the first place and
- how to fix the problem that all my alpha values are the same
would be highly appreciated.
Note: The original post was placed on http://www.fireflyexperiments.com/forum/
Thanks in advance!