Search found 52 matches

by alosca
2010-03-06T21:27:31-07:00
Forum: Users
Topic: MIP- maximum intensity projection
Replies: 25
Views: 51189

Re: MIP- maximum intensity projection

obs: i was expecting "-evaluate max 100" to do the same thing but it is not working: the histogram of the resulting image has many values < 100. what am i missing ? -evaluate max 100 operates on one image only and compares each pixel in that image to the gray level of 100 and takes the ma...
by alosca
2010-03-06T00:41:45-07:00
Forum: Users
Topic: MIP- maximum intensity projection
Replies: 25
Views: 51189

Re: MIP- maximum intensity projection

-min and -max is as clear as -average so my vote goes to them. what might be even more complete is to have something like "-arithmetic function [optional]" where function is one of a set of predefined arithmetic operations over the image pixels, for example min, max, mean, sum, and bitwise...
by alosca
2010-03-05T17:30:36-07:00
Forum: Users
Topic: MIP- maximum intensity projection
Replies: 25
Views: 51189

Re: MIP- maximum intensity projection

agreed, -min and -max would be better even though +/-mip is clear to me too...
by alosca
2010-03-05T16:25:32-07:00
Forum: Users
Topic: MIP- maximum intensity projection
Replies: 25
Views: 51189

Re: MIP- maximum intensity projection

It turns out we're going to use -intensity-projection / +intensity-projection instead of -mips. for the sake of clarity wouldn't be better to have -mip be minimum and +mip maximum ? i don't know why but it seems our brain makes us associate - with min and + with max; it would be easier to memorize ...
by alosca
2010-03-05T10:57:17-07:00
Forum: Users
Topic: MIP- maximum intensity projection
Replies: 25
Views: 51189

Re: MIP- maximum intensity projection

when i tried convert didn't complain running -compose lighten/darken with multiple images but the result is if i was running with the first two images only. if it *does work* then this is indeed the call to have MIP.
magick, would the -mip be any better ?
by alosca
2010-03-05T02:26:14-07:00
Forum: Users
Topic: MIP- maximum intensity projection
Replies: 25
Views: 51189

Re: MIP- maximum intensity projection

-compose lighten gives a much faster solution. thanks! the first form above, i.e., convert image1 image2 image3 ... imageN -compose lighten -composite maxresult doesn't work. here is a simple mip.csh file that did the trick for me: #!/bin/csh # # computes maximum intensity projection of images liste...
by alosca
2010-03-04T18:02:19-07:00
Forum: Users
Topic: MIP- maximum intensity projection
Replies: 25
Views: 51189

MIP- maximum intensity projection

I use convert -fx "max(max(...(max(u[0],u[1]), u[2])...)" to compute the MIP (max intensity projection) of a series of 8-bit grayscale images. It seems to work OK but it is slow. Any other suggestion of using IM to render faster solutions ? I tried `max(u[0],u[1],u[2],...,u[N])` but it doe...