Posted by
Rasband, Wayne (NIH/NIMH) [E] on
Jun 19, 2014; 5:21pm
URL: http://imagej.273.s1.nabble.com/Blobs-LUT-tp5008286p5008331.html
On Jun 18, 2014, at 2:24 PM, Gabriel Landini wrote:
> On Wednesday 18 Jun 2014 19:48:07 Michael Schmid wrote:
>> using plain ImageJ 1.49b on Mac OS X (no Fiji) and having downloaded the
>> sample images a few minutes ago, blobs.gif opens from disk with inverting
>> LUT, as it does from the Web without cached sample images.
>
> Hi Thanks for the follow up.
> Here I am talking about the original IJ1 updated to the latest build 1.49c14.
> I also have installed Fiji in the same computer, but I get the wrong LUT with
> IJ1 (and not the Fiji install).
This recent regression is fixed in the latest ImageJ daily build (1.49c15). Cached versions of the blobs.gif sample image again open with an inverting LUT. The new ij.plugin.Gif_Reader plugin, used by File>Open, opens animated GIFs but does not correctly handle inverting LUTs. The daily build works around this problem by using Toolkit.getDefaultToolkit().createImage() to open blobs.gif.
-wayne
> On Wednesday 18 Jun 2014 12:21:51 Mark Hiner wrote:
>> If you disable SCIFIO (Edit > Options > ImageJ2, uncheck the "Use
>> SCIFIO...") both cached and uncached sample images should open the same way.
>
> There is no such command in IJ1.
>
> I can confirm that the cached blobs.gif loads from the net (when there is no
> cache) correctly as inverted LUT:
>
> Title: blobs.gif
> Width: 256 pixels
> Height: 254 pixels
> Pixel size: 1x1 pixel
> ID: -16
> Coordinate origin: 0,0
> Bits per pixel: 8 (inverting grayscale LUT)
> Display range: 0-255
> No Threshold
> Uncalibrated
> URL:
http://imagej.nih.gov/ij/images/blobs.gif> Screen location: 10,148 (1920x1200)
> No Overlay
> No Selection
>
> but from the cache it shows grays LUT:
>
> Title: blobs.gif
> Width: 256 pixels
> Height: 254 pixels
> Pixel size: 1x1 pixel
> ID: -12
> Coordinate origin: 0,0
> Bits per pixel: 8 (grayscale LUT)
> Display range: 0-255
> No Threshold
> Uncalibrated
> URL:
http://imagej.nih.gov/ij/images/blobs.gif> Screen location: 10,148 (1920x1200)
> No Overlay
> No Selection
>
> I cannot imagine this being desirable. Inverted LUTs are confusing enough, to
> then have the software decide how to load the data.
>
> Cheers
>
> Gabriel
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