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Home Posts tagged "filter"

Tag: filter

Enhancing Spy Camera Photos of Documents

This post is about how you can processed a photo (spy photo) of a document using rectification and moving average thresholding in Matlab. The Problem We have all been in the situation where we wish…

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Matz August 23, 2015 - 11:38 pm August 24, 2015MATLAB exposure, filter, Image Processing 0

Smoothing a Halftone Photo using FFT

In this post I will show how to smooth a halftone image using the fast Fourier Transform (FFT). You can try this out yourself by downloading my Matlab code on the bottom of the article.…

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Matz August 8, 2015 - 11:13 pm December 14, 2022MATLAB FFT, filter, Image Processing 2

How the FBI Found Swirl Face Using Photoshop

In October 8, 2007, Interpol released a photo of a man suspected of paedophilia with boys, see Interpol link. The investigation was named ‘Operation Vico’. It was a unique case, because the person on the…

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Matz July 26, 2015 - 9:14 pm October 17, 2021Photoshop filter, forensics, Image Processing 4

Hybrid images: Adolf Chaplin and Miley Einstein

I recently attended a course in Image Processing and in one lecture my teacher showed me an image of Marilyn Monroe depicted in a newspaper. My teacher then took the newspaper and walked towards the…

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Matz January 22, 2014 - 12:50 am April 23, 2014Photoshop Chaplin, Einstein, filter, Hitler, Image Processing, Miley Cyrus 0
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