Hi Folks,
I think I'm doing something wrong as the scatter plot should filled the whole graph instead just part of it: http://img383.imageshack.us/my.php?image=funnyscatterplot2lm.jpg Here's what I did: 1. Open all files 24 bit TIFF (Green only and Red only fluorescence images). 2. Convert to 8 bit for each image: Image>Type>8 bit 3. Analysis: Plugins>Colocalisation analysis>Manders coefficients 4. Manders Calculator appears: Set green image to green channel, red to red channel None for use ROI Selected Display Colour Scatterplot Selected Exclude zero-zero pixels 5. Press ok. Statistics seems fine but scatterplot is funny. I'll be grateful for any advice that you may share and thank you. Sincerely, Kong Heng |
Hi Kong,
I think this is caused by the type of conversion you use. First split the 24bit RGB images into their channels and then use the respective green or red channel for your analysis. Otherwise you reduce your brightness (intensity) values due to the conversion process. Hope this helps Guenter ------------------------------------------ Dr. Guenter Giese Light Microscopy Facility Manager Dept. of Biomedical Optics, MPI fuer Medizinische Forschung Jahnstr. 29, D-69120 Heidelberg, Germany Phone (+49) 6221-486-360 (Fax: -325) e-mail: [hidden email] http://lightmicro.mpimf-heidelberg.mpg.de -----Ursprüngliche Nachricht----- Von: ImageJ Interest Group [mailto:[hidden email]] Im Auftrag von Lee Kong Heng Gesendet: Tuesday, 15 November, 2005 10:40 An: [hidden email] Betreff: Colocalisation analysis Hi Folks, I think I'm doing something wrong as the scatter plot should filled the whole graph instead just part of it: http://img383.imageshack.us/my.php?image=funnyscatterplot2lm.jpg Here's what I did: 1. Open all files 24 bit TIFF (Green only and Red only fluorescence images). 2. Convert to 8 bit for each image: Image>Type>8 bit 3. Analysis: Plugins>Colocalisation analysis>Manders coefficients 4. Manders Calculator appears: Set green image to green channel, red to red channel None for use ROI Selected Display Colour Scatterplot Selected Exclude zero-zero pixels 5. Press ok. Statistics seems fine but scatterplot is funny. I'll be grateful for any advice that you may share and thank you. Sincerely, Kong Heng |
In reply to this post by Lee Kong Heng
Hi Guenter,
It worked. Thank you very much. Sincerely, Kong Heng -----Original Message----- From: ImageJ Interest Group [mailto:[hidden email]] On Behalf Of Guenter Giese Sent: Tuesday, November 15, 2005 6:24 PM To: [hidden email] Subject: AW: Colocalisation analysis Hi Kong, I think this is caused by the type of conversion you use. First split the 24bit RGB images into their channels and then use the respective green or red channel for your analysis. Otherwise you reduce your brightness (intensity) values due to the conversion process. Hope this helps Guenter ------------------------------------------ Dr. Guenter Giese Light Microscopy Facility Manager Dept. of Biomedical Optics, MPI fuer Medizinische Forschung Jahnstr. 29, D-69120 Heidelberg, Germany Phone (+49) 6221-486-360 (Fax: -325) e-mail: [hidden email] http://lightmicro.mpimf-heidelberg.mpg.de -----Ursprüngliche Nachricht----- Von: ImageJ Interest Group [mailto:[hidden email]] Im Auftrag von Lee Kong Heng Gesendet: Tuesday, 15 November, 2005 10:40 An: [hidden email] Betreff: Colocalisation analysis |
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