Hello everyone,
I'm using WCIF ImageJ 1.37c. I am trying to analyze images where I set Image/Properties so that unit of length is "nm" and Pixel Height and Width are 30. When I use the "Analyze Particles" function, the size is interpreted in nm^2, even though it specifically claims to ask for pixel^2! I.e. to exclude a particle which is four pixels large, I need to have a lower size limit of over 4*30*30=3600, not 4! I assume this is a bug in the documentation? Or am I doing something wrong? Thanks in advance for your help, Jonas ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ |
On Wednesday 20 September 2006 13:02, Jonas Binding wrote:
> I'm using WCIF ImageJ 1.37c. I am trying to analyze images where I set > Image/Properties so that unit of length is "nm" and Pixel Height and Width > are 30. When I use the "Analyze Particles" function, the size is > interpreted in nm^2, even though it specifically claims to ask for pixel^2! > I.e. to exclude a particle which is four pixels large, I need to have a > lower size limit of over 4*30*30=3600, not 4! I assume this is a bug in the > documentation? Or am I doing something wrong? Hi, I am not sure that I understand what is the problem. In my setup (1.37s, from the daily build) the units are displayed correctly in the Analyze Particles dialog. According to the Notes page ( http://rsb.info.nih.gov/ij/notes.html ), this was implemented in v1.35e, so I imagine that it should be also OK in v1.37c. Also the documentation pages http://rsbweb.nih.gov/ij/docs/menus/analyze.html#ap and http://imagejdocu.tudor.lu/imagej-documenation-wiki/gui-commands/analyze-particles (the latter was imported from the former) seem to be both fine (i.e. they do not seem to specify "pixels" as units for filtering: "Particles outside the range specified in the Size field are ignored. Enter a single value in Size and particles smaller than that value are ignored. " What is the bug? Cheers, Gabriel |
Hello,
sorry, never mind - I can't reproduce my problem myself any more. I guess I should have just gone home a couple of hours ago :-/. Thanks for your time, Jonas ImageJ Interest Group <[hidden email]> wrote on 20.09.2006 16:18:51: > On Wednesday 20 September 2006 13:02, Jonas Binding wrote: > > I'm using WCIF ImageJ 1.37c. I am trying to analyze images where I set > > Image/Properties so that unit of length is "nm" and Pixel Height and Width > > are 30. When I use the "Analyze Particles" function, the size is > > interpreted in nm^2, even though it specifically claims to ask for pixel^2! > > I.e. to exclude a particle which is four pixels large, I need to have a > > lower size limit of over 4*30*30=3600, not 4! I assume this is a bug in the > > documentation? Or am I doing something wrong? > > Hi, > I am not sure that I understand what is the problem. > In my setup (1.37s, from the daily build) the units are displayed > correctly in > the Analyze Particles dialog. > > According to the Notes page ( http://rsb.info.nih.gov/ij/notes.html ), this > was implemented in v1.35e, so I imagine that it should be also OK in v1.37c. > > Also the documentation pages > http://rsbweb.nih.gov/ij/docs/menus/analyze.html#ap > and > http://imagejdocu.tudor.lu/imagej-documenation-wiki/gui- > commands/analyze-particles > > (the latter was imported from the former) seem to be both fine (i.e. they do > not seem to specify "pixels" as units for filtering: > > "Particles outside the range specified in the Size field are ignored. Enter a > single value in Size and particles smaller than that value are ignored. " > > What is the bug? > > Cheers, > > Gabriel ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please visit http://www.messagelabs.com/email ______________________________________________________________________ |
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