Save as PNG problem

Posted by Roger Bourne on Aug 10, 2009; 4:25am
URL: http://imagej.273.s1.nabble.com/Save-as-PNG-problem-tp3691200.html

Dear List

My students have found some apparently inconsistent behavior with the
Save As PNG command.
We opened a 16 bit dicom and used Menu: Image > Type to change to 8 bit
before saving as PNG.  Also saved as 16 bit PNG prior to this.
The PNG file size was the same in both cases.

Similarly, when an 8 bit PNG was opened and changed to 16 bit before
saving as PNG there was no change in file size and the reopened file
appears to still be 8 bit.

Conclusion: It appears that the Save As PNG command is not reading the
currently set bit depth.

IJ 1.41o  Java 1.6.0_10

Thanks
Roger

--
-----------------------------------
Dr Roger Bourne
Lecturer, Medical Radiation Physics
Medical Radiation Sciences
University of Sydney
Tel: [phone]
Fax: [phone]

C42 - Cumberland Campus
The University of Sydney
East Street
Lidcombe
NSW 2141 Australia
-----------------------------------