Linux/Unix

25 Amazing things you can do in a linux command terminal

Linux commandline is absolutely amazing loved by almost all system administrators. Here you will discover powerful and impossible things you…

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HOWTO: Setup Nginx/PHP/MySQL/WordPress in Amazon EC2

Nginx is a lightning fast, lightweight web server, a great alternative for apache in terms of speed, scalability. The good…

Beginners Word2vec Tutorial on large Text corpus

Word2vec when run on large text corpus, automatically captures relationships and similarities in text data. For example, if you ask…

Shell command remove empty lines in a text file

You can remove empty lines on a fly using “sed” in  a shell.  This is how sed ‘/^$/d’ input.txt >…

Fast perl shell script to remove stopwords from text corpus.

If you are looking to remove certain words from a file1 with list of stopwords from file2 (one per line),…

Screenshots using Firefox and Xvfb in Amazon EC2

Running a screenshot server in Amazon linux can be little tricky in EC2 but not impossible. I managed to install…

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How to scan documents using laptop video camera?

I have been such a lazy user of scanners. I really hate pulling up a scanner everytime to scan small…

Denoising stained images using kmeans clustering

Lets take a look on how we remove stains in noisy stains in grayscale images.   Kaggle has competition on…

Detection of Facial eye points with k-means clustering

K-means is a clustering algorithm which can be applied on various machine learning problems. Lets  take a look on how…

Applying Gabor filter on faces using OpenCV

Gabor filters are in the heart of computer vision problems. I decided to play around with gabor filters mainly because…

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