Fig. 5
From: A baseline structure inventory with critical attribution for the US and its territories

Example of unfavorable structure extraction outcomes due to poor image quality or overly complex patterns that are not able to be removed during automatic QA/QC. (a) Raw structure extraction results colored in purple. Note the omissions due to the clouds. (recreated from4). (b) Additional false positives that require manual QA/QC. The false positives in the yellow boxes are particular difficult to filter out by VVM.