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Warning: DirtyDB is used. This is fine for testing but not recommended for production. -- To suppress these warning messages change suppressErrorsInPadText to true in your settings.json Erasing the background
An example of erasing the background "in the wild" MIM Curator Saskia ... shows how photos were made when in Gambia ? taking pictures of local instruments.
http://mim.be/hajhouj?from_i_m=1 Example of photograph from the musical instruments museum: background is neutral; the description of the context is moved into the text
Thursday. After the intoxicating smells and colours of the tannery souk, we continue our stroll along the Mohassine alleyway in a northerly direction. Soon we come to a shop selling musical instruments. We go inside. Like all Moroccan instrument shops, it is crammed from top to bottom with instruments of every description. My eye is drawn to a beautiful guembri or hajhouj, the 'bass guitar' of the Gnawa people. This one, it seems to me, would be perfect for the mim. The shopkeeper built it himself, and - even more interesting - it turns out he is a maâlem (gnawa master). His full name is Mohammed Ben Boujamaâ Filali, Ben Boujamaâ for short, the son of Boujamaâ. I tell him I want to buy the hajhouj, but that I would also like to make a recording of it. Ben Boujamaâ has a suggestion: I pay a deposit now and come back the next morning at 10 o'clock for a short gnawa session in his workshop. He will make sure the cantor of his group is there.
http://docs.opencv.org/trunk/d1/dc5/tutorial_background_subtraction.html Background subtraction: technique usually used in video every time you have a new frame, the code makes a diff and substracts the element that stands out simple algorithm that presupposes you have the opportunity to come to a clean slate of the background if you don't have this reference you have to make the algorithm learn what counts as a difference: have a large amount of footage that teaches the algorithm what makes a difference
in the museum context, we don't have enough images for the algorithm to learn other techniques: the selection of the color of the background we want to remove
Gimp: Foreground Select Tool two stages: first you use the lasso tool to select a large area that contains the object, second stage is a pen with which you can select vaguely the outlines of the object. then becomes a selection