Fig. 1: Visual comparison of the two segmentation methods.
From: Significant contribution of small icebergs to the freshwater budget in Greenland fjords
Examples of UNet performance on Planet imagery a, c vs. conventional thresholding of top of atmosphere (TOA) of Sentinel-2 imagery b, d. Both images a, b are acquired roughly 30 min apart on June 15, 2019. Note the small patch of cloud that is in the left-center of both Planet and Sentinel-2 images, which is falsely detected as an iceberg with thresholding method, while UNet predicts a true negative. The colormap shows the probability of iceberg detections which is set to ≥75% for UNet detections. Panel a is from ©Planet Labs Inc. 2020. All Rights Reserved.
