Re: ImageJ handle large pictures better on a PC than on a Mac?

Posted by Rasband, Wayne (NIH/NIMH) [E] on Sep 23, 2015; 12:04am
URL: http://imagej.273.s1.nabble.com/ImageJ-handle-large-pictures-better-on-a-PC-than-on-a-Mac-tp5014394p5014420.html

On Sep 22, 2015, at 2:47 AM, Flemming Ravn Merkel <[hidden email]> wrote:
>
> Hi All
>
> I handle large pictures in ImageJ (100-300 MB) and I find for some reason that when zoomed in on the picture I can easily scroll smootless through the picture when running ImageJ on a PC, while on a Mac computer the picture moves with an annoying delay and jumps from one point to another.
>
> It happens on both my Mac computers, but when running windows on the very same computers (using bootcamp) the problem disappear.
>
> Is there any reason why ImageJ should be able to handle large pictures better on a Windows version rather than a Mac version? When opening the pictures in Mac’s own default viewer (Preview) there is no problem.

This is one case where Java 8 is faster on OS X. I can scroll a 8400x8400 RGB image (269MB) at 23 fps using Java 1.8.0_60 but only at 4 fps using Java 1.6.0_65. To create a test image, open the Nile Bend sample image (4200X4200) and scale it by a factor of 2. Enable debugging (Edit>Options>Misc) to display the frame rate. Java 8 and Java 6 versions of ImageJ are available at

   http://imagej.nih.gov/ij/download.html

To run ImageJ using Java 6, you may need to download and install the Apple legacy Java 6 runtime from

   https://support.apple.com/kb/DL1572?locale=en_US

Java 1.8.0_60 is included with the ImageJ/Java 8 distribution.

-wayne




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