HyperSIGMA 1 m hyperspectral pretraining patches
Summary
Kept patches: 2,519,999
Preprocessing errors recorded: 198
Patch shape: [C, 64, 64]
Tile file shape: [N, C, 64, 64]
Expected channels: 216
Prepared dtype: float32 (verify individual files)
Invalid-patch rule: reject a patch when at least 50% of spatial pixels
have all spectral values equal to zero.
Tiling: stride 64 where possible; edge windows can overlap slightly.
