Mathematician earth watcher
I hope this blog is useful or maybe it can help other people. If you think this blog was not good, please send me email to ogumelar@gmail.com or ogumelar@yahoo.com
link2 dari google
Klik di sini untuk refresh halaman
Wednesday, February 12, 2020
Wednesday, March 6, 2019
Teknik Resampling Citra Satelit
Proses pengolahan citra mulai dari pembesaran (enlargement), pengecilan (shrinking), perputaran (rotating), koreksi geometri, rektifikasi, registrasi citra, pergeseran (translasi) dan lainnya. Semua proses pengolahan citra digital tersebut menggunakan resampling yang berarti merubah nilai piksel raster asal (domain) menjadi suatu nilai piksel raster hasil (kodomain). Terdapat tiga teknik resampling yang umum digunakan dalam proses resampling yaitu tetangga terdekat, interpolasi bilinear dan konvolusi kubik. Ketiga teknik ini sering digunakan perangkat lunak pengolahan citra secara digital. Untuk resampling dengan metode tetangga terdekat tidak mengubah nilai piksel asli dari input raster tetapi hasilnya menjadi jaggy atau checkerboard (kotak-kotak). Sedangkan untuk teknik resampling bilinear dan konvolusi kubik menghasilkan citra lebih halus tetapi membutuhkan waktu lebih lama dibandingkan dengan tetangga terdekat. Waktu tersebut digunakan untuk komputasi lebih rumit dibanding teknik tetangga terdekat.
https://www.academia.edu/11132543/Teknik_Resampling_Citra_Satelit
Saturday, April 14, 2018
Peta interaktif klhk
http://geoportal.menlhk.go.id/arcgis/apps/Viewer/index.html?appid=8f491695fab04bb99d03962bbd747abd
Wednesday, February 7, 2018
利用雷达图像监测印度尼西亚森林火灾研究
摘要
近些年来印度尼西亚的森林火灾事件大多发生在苏门答腊和加里曼丹地区,这是人类与森林相互作用的结果,如开放森林区域中的移动耕作。如果云层、烟雾和薄雾覆盖了一个采景地区的所有部分,
那么光学图像卫星的工作效果就很差。目前为止ALOS(l
波段)
和Sentinel-1
(c 波段)是森林退化监测中最有前景的雷达卫星图像。这些
L-HV 和
C-HV 不仅对清除森林和火灾疤痕非常灵敏,还可以检测森林植被的变化。辐射校准过程中的关键是将其数字转换为后向散射系数或伽马值。随机森林和神经网络是确定森林或非林业区域 (如果雷达能准确检测到烧毁森林面积) 的分类方法。
Monday, September 7, 2015
Adding image with Ingesting DataDoors Software
Ogi Gumelar*), Rubini
Jusuf*),Rita Silvana Arlis*), Riyan Mahendra Saputra*)
*)LAPAN
ogi.gumelar@lapan.go.id
Abstract
Datadoors
Appliance serve image satellite using SCIMr software in unique way beside
interesting if we see by visual. Ingesting system or can we called it half
automated in finding satellite image and also preparing catalog system for
imagery. Optical and radar image can be detected very well by SCIMr, the structure
of radar seem to be more difficult to be ingested. There were several images
which is not standard from the other images and those non standard cannot be
displayed in catalog system. For example like the new image satellites ALOS2
PALSAR, SPOT-7, MODIS, NPP, etc. We can see how low spatial resolution can have
bigger swath where can cover all of area in Indonesia in one single image. The
format output of product processing can be selected according to option of
datadoors system like Color Infrared, Copy source data, Shaded relief Color,
Natural Color and etc.
Friday, August 2, 2013
Subscribe to:
Posts (Atom)