the coverage of the cropped image. It can happen that
there are patches of negative values in images, either due to loss of
data during transmission (typically a band or a large rectangular patch
of negative data) or due to overall low data counts (missing data is no
data).
image_cropper labels an image as corrupt if &gt;5% of its pixels are still
negative after cropping. This might be problematic for lines with low
data counts (and therefore many missing pixels) and the user is advised
to disable the cover