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Volcanic Eruption & Flow, Drone footage
Video
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Author: Ibrahim El Merehbi
Pick colors from an Image
LinkThis useful web application allows you to pick colors from an image either by uploading it or by giving its url. This was very useful when writing an article.
How Groundwater Extraction & Replenishing Causes Surface Deformation & Subsidence
Researchers at Caltech made the animations below which show the seasonal deformation and subsidence of Earth’s surface, respectively, as a result of groundwater extraction and refilling. This occurs when soil and earth layers are compacted and undergo subsidence due to the decrease of upward hydrostatic pressure balancing the weight of the layers.
Surface deformation and subsidence of Earth’s surface is measured using Interferometric Synthetic Aperture Radar (ISAR). ISAR is also used for natural hazard assessment. This includes applications to regions of volcanic, tectonic (e.g. faults and mountains), and construction activities.
source: Caltech
Research Proposal Writing
LinkHandy Bash Commands
StandardA few commands I use frequently but sometimes forget.
Concatenate mutliple PDF files
pdftk *.pdf cat output out.pdf
Convert a PDF page to an image
convert -density 150 input.pdf -quality 90 output.png
Batch resize images
mogrify -resize 640x480 *.{png|jpeg}
Crop an image
convert input.png -crop 0x4000 output.png
Create a GIF animation from images (10s delay, loop endlessly)
convert -delay 10 -loop 0 *.png animation.gif
Convolutional Neural Network for Oil Spill detection in Synthetic Aperture Radar Satellite Images
Image
