computer vision

Blob detection on Satellite Imagery, using OpenCV

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OpenCV is a fantastic tool for quickly processing satellite data. It is incredibly powerful and very fast. It has also just recently been updated; the full announcement is here. Previously I used Image Segmentation with the Watershed Algorithm to successfully map circular irrigation features using OpenCV. Like many geospatial/image processes (where there are multiple ways… Read More »Blob detection on Satellite Imagery, using OpenCV

Interactive Image Segmentation part 1

A few weeks ago I saw this tweet from UrtheCast We wish you a happy #EarthDay with this stunning #DEIMOS1 view of crop circles in the desert in #SaudiArabia! #PrecisionAg #Geoanalytics pic.twitter.com/szcSptjHMS — UrtheCast (@UrtheCast) April 22, 2017 It is a stunning image, captured by Deimos 1, of crop circles in Saudi Arabia. I really… Read More »Interactive Image Segmentation part 1

Sat Colours

I’ve been thinking about how colour could be displayed for a Satellite Image. The Earth is beautiful. In some software, in the legend, a Satellite image is displayed as below Image from http://webhelp.esri.com/arcgisexplorer/2500/en/legend_window.htm It does contain some useful information, ie what band is being displayed Red, Green and Blue, but it tells us very little… Read More »Sat Colours