Hi
I'm just wondering what is the reason some operations are working with angle values expressed in rad whereas others give angles in degre ? I'm playing around with angle measurements wich in turn are used to rotate features in my images and there I have to play around with the conversions rad/deg Wouldn't it be possible to definitly choose between rad or deg ? Thank you, Fabrice. -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
Hi Fabrice,
which commands of ImageJ use radians? I don't know all ImageJ commands, but as far as I remember all commands of the user interface are in degrees. Also, I did not find the text 'radian' in the PDF users guide. The trigonometric functions in Java and the macro language use radians, like all programing languages that I am aware of (except programmable pocket calculators, an almost extinct species). So, when you write a macro that uses trigonometric functions, of course you need the factor of 180/PI = 57.2957795131 to convert. Michael ________________________________________________________________ On Mar 5, 2014, at 12:07, Fabrice Senger wrote: > Hi > I'm just wondering what is the reason some operations are working with > angle values expressed in rad whereas others give angles in degre ? > > I'm playing around with angle measurements wich in turn are used to rotate > features in my images and there I have to play around with the conversions > rad/deg > > Wouldn't it be possible to definitly choose between rad or deg ? > > Thank you, > > Fabrice. > > -- > ImageJ mailing list: http://imagej.nih.gov/ij/list.html -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
Yesss !
The trigonometric functions in Java and the macro language use radians, like > all programing languages that I am aware of That's it, quite simple. And that is the reason why I have to play around between radians and degrees. As I'm kind of lazy I thought the conversion between radians and degrees might be automated some how. Anyway, I'm doing it in my macros. Thank you for your kind reply, Fabrice. 2014-03-05 18:46 UTC+01:00, Michael Schmid <[hidden email]>: > Hi Fabrice, > > which commands of ImageJ use radians? > > I don't know all ImageJ commands, but as far as I remember all commands of > the user interface are in degrees. Also, I did not find the text 'radian' > in the PDF users guide. > > The trigonometric functions in Java and the macro language use radians, like > all programing languages that I am aware of (except programmable pocket > calculators, an almost extinct species). So, when you write a macro that > uses trigonometric functions, of course you need the factor of 180/PI = > 57.2957795131 to convert. > > Michael > ________________________________________________________________ > On Mar 5, 2014, at 12:07, Fabrice Senger wrote: > >> Hi >> I'm just wondering what is the reason some operations are working with >> angle values expressed in rad whereas others give angles in degre ? >> >> I'm playing around with angle measurements wich in turn are used to >> rotate >> features in my images and there I have to play around with the >> conversions >> rad/deg >> >> Wouldn't it be possible to definitly choose between rad or deg ? >> >> Thank you, >> >> Fabrice. >> >> -- >> ImageJ mailing list: http://imagej.nih.gov/ij/list.html > > -- > ImageJ mailing list: http://imagej.nih.gov/ij/list.html > -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html |
Free forum by Nabble | Edit this page |