search

davidcsterratt / retistruct

Computational reconstruction and transformation of flattened retinae
http://davidcsterratt.github.io/retistruct/
7 stars 7 forks source link

Scale bar question #15

Closed briancohn closed 7 years ago

briancohn commented 7 years ago

https://github.com/davidcsterratt/retistruct/blob/master/pkg/retistructdemos/inst/extdata/Figure_6-data/right-contra/scale.csv

What is this number? In this example, it says scale = 5.95. Does that mean that 1 ImageJ pixel is equal to 5.95mm? Or does it mean that 5.95 imageJ pixels are equal to one mm? Thanks @davidcsterratt !

davidcsterratt commented 7 years ago

From the user guide, p 3:

Specifying the scale Optionally, the scale of the image can be specified by providing a file scale.csv in the same directory as the image and ROI files. This file should contain two lines, the first with the heading Scale and the second with the length of the side of a pixel in micrometres.

Actually, it doesn't have to be micrometres.

briancohn commented 7 years ago

thanks!