Category Archives: foto

High Pass Filter to Gimp

I wanted to edit a photo with the High Pass Filter but I noticed it wasn’t installed yet. The reason for that was that I had made the switch to Ubuntu Linux. I had to search the internet and finally … Continue reading

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Exiv2: exif tool for photos

Many programs give you the ability to view the exif data of a photo. According to Wikipedia is the Exchangeable image file format (officially Exif, according to JEIDA/JEITA/CIPA specifications) a standard that specifies the formats for images, sound, and ancillary … Continue reading

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New app on my phone: AsciiCam

With this app you can make ASCII images with your telephone camera. With this app you don’t make pictures but ASCII images. Instead of pixels the image is made/filled with ASCII characters. The image makes it clear (it represents my … Continue reading

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Heal Tool Gimp

The Heal Tool of the photo editing program Gimp is a very useful tool. With it you can remove objects from pictures: lampposts, people, animals etc. See the example below. When you look closely, you will be able to see … Continue reading

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Hugin

I made a trip to Blijdorp Zoo. I brought my tripod with me. I wanted to test at home how to stitch photos together with a program called Hugin and needed therefore pictures. This is how it works. You take … Continue reading

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Color theory

A link worthwhile to save: http://www.tigercolor.com/color-lab/color-theory/color-theory-intro.htm. This site gives a good explanation on color theory. In particular the explanation on color harmonies I found interesting. To make good use of the program Agave one has to know the distinction between … Continue reading

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Hue/Saturation/Lightness

This picture is taken in the Rijksmuseum van Oudheden (translation: Dutch National Museum of Antiquities) in Leiden. Picture 1 shows the unedited picture. It is clear that the colors in the picture are not right. The statue was white/gray against … Continue reading

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Interesting programs

Interesting drawing and edit programs that I use, are: Kmplot, Hugin, Geogebra, Fotowall en Gimp. These programs are all worthwhile. I will discuss them each individually in detail later on.

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Croptool Wikimedia Commons

There are several interesting tools which can make the life of editors of Wikimedia Commons and Wikipedia easier. One of them is the croptool of Wikimedia Commons. It is easy to cut parts of an image with this tool. Especially … Continue reading

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Islamic geometry

> The illustration on the screen is used to screen off the activities taking place at Metrostation Blaak. Clearly one can see the mathematical illustrations. This inspired me. I wondered how I could make them myself one day. After searching … Continue reading

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