Fencepost of the Week #231
Wildeep's Illuminations
Welcome to Wildeep's Illuminations, a blog of imagery and rumination, fresh from the desktop of Ben Mitchell.
Friday, 15 November 2024
Thursday, 31 October 2024
Photogrammetry of Very Small Things
Exciting progress on 'photogrammetry of very small things' this evening: I have devised a simple, but effective rostrum for photographing tiny subjects from every angle.
Rostrum made from a flower pot, 2 cardboard circles and a wine cork. Lighting from a very small torch fastened to the rig by a rubber band; there is a white sticky label on the light to make the lighting more diffuse.
A shrivelled, dry Cladonia caespiticia specimen. Small... and very frilly. The ruler is cm, not inches.
A really quite detailed 3d model generated from 60 photos taken from various angles. This time I used Apple's free 3d Scanner App which is easy to use and the results seem okay so far.
Here is one of the 60 source photos used to construct the 3d model:
Here's a link to the resulting 3d model: https://3dviewer.net/#model=https://www.dropbox.com/scl/fi/2o33u6wbjwsqj07to1p32/CladoniaCaespiticiaModel.zip?rlkey=3vmlxhudxoatpm6d366zzw46s&st=bz8nymih&dl=0
...and a second one: Cetrelia cetraroides. This one was done on a cloudy day with no artifical light sources. 3d view here.
You can also download the model files and use them with your own 3d software here: dropbox. If you have VR, why not try sticking it in there, and blow it up to the size of a house! =o)
Wednesday, 23 October 2024
Monday, 14 October 2024
Thursday, 26 September 2024
Monday, 16 September 2024
iNaturalist Population Maps
It's not perfect data by any means, but you can make some pretty interesting insights by browsing iNaturalist's species maps.
As someone who was very enthusiastic about reptlies growing up, it was always perplexing to me how I could never find any reptiles near where I lived in Central Scotland. Whenever I went on holiday I would find plenty, but not at home. As you can see from the iNaturalist data, I am not alone in finding reptiles to be scarce in the Central Belt.
Adder - Vipera berus - iNaturalist observations. |
Slow worm - Anguis fragilis - iNaturalist observations |
Also, Slow worms *really dislike* Italy: