topic Re: Unclassified (Class 0) Pixels in Deep Learning Output Raster in ArcGIS Image Analyst Questions

Unclassified (Class 0) Pixels in Deep Learning Output Raster

GBacon — Fri, 28 Apr 2023 11:21:49 GMT

I produced some very good results when using the "High Resolution Land Cover - USA" deep learning package with NAIP imagery. There is a relatively small number of unclassified (0) pixels in the raster output that I'm wondering if others have seen. In most cases, this seems to happen in areas where tree canopy is over a road or other impervious surface as shown below. I can easily fix this with the Image Analyst pixel editor, but wondered if this could be prevented somehow since it happened in two different years of imagery, one natural color and one IR. Has anyone else seen this? I used ArcGIS Pro 3.1 and associated deep learning libraries.

Impressive results though!

Re: Unclassified (Class 0) Pixels in Deep Learning Output Raster

JeffreySwain — Fri, 28 Apr 2023 14:29:08 GMT

Hey @GBacon ,

Did you use the default settings with the deep learning package? If you are missing some areas, then you might want to try to change to the less detailed classes to see if you get the complete coverage. That particular package doesn't have any threshold to adjust, but just remember those model parameters are there for you to adjust to fit your data. So try altering them to see if they improve the results of your classification.

Re: Unclassified (Class 0) Pixels in Deep Learning Output Raster

GBacon — Fri, 28 Apr 2023 22:29:08 GMT

I just tested a small area that had this problem, and the results look much better with the simplified classes. Thank you!

Re: Unclassified (Class 0) Pixels in Deep Learning Output Raster

JeffreySwain — Mon, 01 May 2023 13:10:36 GMT

Great ! All of the deep learning models have parameters to adjust to meet your classification needs.