[R] Brightness readings for part of an image

From: S. Messing <messing_at_stanford.edu>
Date: Fri, 21 Nov 2008 19:33:06 -0800 (PST)

Hi R users,

I am doing some image analysis and I'd like to know if anyone knows of:

  1. a way to specify a rectangle (using xy coordinates) within an image to have R evaluate using xy pixel coordinates and
  2. a way to get brightness readings for that part of the image.

If there's some way to crop the image using 2x2 xy coordinates, for instance in the EBImage package, that would work as well.

Thanks!

-- 
View this message in context: http://www.nabble.com/Brightness-readings-for-part-of-an-image-tp20633094p20633094.html
Sent from the R help mailing list archive at Nabble.com.

______________________________________________
R-help_at_r-project.org mailing list
https://stat.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
and provide commented, minimal, self-contained, reproducible code.
Received on Sat 22 Nov 2008 - 11:14:20 GMT

Archive maintained by Robert King, hosted by the discipline of statistics at the University of Newcastle, Australia.
Archive generated by hypermail 2.2.0, at Sat 22 Nov 2008 - 11:30:27 GMT.

Mailing list information is available at https://stat.ethz.ch/mailman/listinfo/r-help. Please read the posting guide before posting to the list.

list of date sections of archive