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Hi all As you know atmospheric effect cuses real Dn values to be reduced. So if we apply an atmospheric correction method like quic correction or log residual (using envi software) resulted dn valuse should be in original range. But what is the problem? for example after applying quac method,dn values range grow to 10 or 20 time grater than original value. What is the problem?Do you know? Than you

Hello everybody, the Sykbox Imaging Company (now it belongs to google), provides videos of 30 sec from their satellites (resolution ~1m) even at night. About http://www.skyboximaging.com/ Videos all other videos http://www.firstimagery.skybox.com/hd-video/ https://www.youtube.com/user/SkyboxImagingInc regards I

1. Betul, bisa pake metode nearest neighbor, bilinear, cubic convolution, majority filter, etc 2. ya karena analisa digital lebih mementingkan informasi spektral, sedangkan dari aspek spasial ya kalo akurasi bisa naik ya bagus, tapi kalau nilai spektral jadi kacau ya thumbdown banget 3. nah kira2 kalau ditajamkan, secara spasial hasil ekstraksinya lebih akurat dan smooth apa tidak? kalau tidak ya memang tidak perlu 4. penajaman itu kan supaya hasilnya bisa lebih akurat, btw kamu kayaknya masih kabur antara konsep penajaman dalam konteks pan sharpening/image fusion dan penajaman resampling ukuran piksel dari detil ke kasar and vice versa udah paham bedanya pan sharpening dan pixel resampling belom?