Without using Sentinel Hub for processing

Question

Without using Sentinel Hub for processing

jassantos opened this issue 7 years ago · comments

I actually have downloaded Sentinel 2 scenes. Is it possible not to use the sentinel hub to download the Sentinel 2 data and just use the ones I am keeping? As I have seen in your examples, it uses the Sentinel Hub.

Matej Aleksandrov · Answer 1 · Mon Mar 19 2018 18:22:49 GMT+0800 (China Standard Time)

Hi jassantos,

it is possible to use your own data for classification. Sentinel Hub services in the examples only provide the required data. You can also read your data, resize all band images to the same size and join them together into one numpy array where bands are in the order B01,B02,B04,B05,B08,B8A,B09,B10,B11,B12 (not all bands are used).

The cloud masks can then be calculated like this

cloud_detector = S2PixelCloudDetector(threshold=0.4, average_over=4, dilation_size=2)

cloud_probs = cloud_detector.get_cloud_probability_maps(my_band_images)
cloud_masks = cloud_detector.get_cloud_masks(my_band_images)

Anze Zupanc · Answer 2 · Mon Mar 19 2018 19:08:41 GMT+0800 (China Standard Time)

In addition, I believe you need to divide the band values by 10000. The classifier expects the reflectances to be between 0 and 1.

jassantos · Answer 3 · Tue Mar 20 2018 10:08:34 GMT+0800 (China Standard Time)

Thank you AleksMat and azupanc for your responses. I will look into it.