Ticket #1866 (reviewing defect)
Opened 2013-05-13T17:03:48-05:00
Last modified 2013-12-06T17:39:01-06:00
IJ2 true color ranges improperly initialized
| Reported by: | aivar | Owned by: | curtis |
|---|---|---|---|
| Priority: | major | Milestone: | imagej2-b8-analysis |
| Component: | Display API | Version: | |
| Severity: | major | Keywords: | |
| Cc: | Blocked By: | ||
| Blocking: | #1244 |
Description
DefaultDatasetView.initializeView autoscales each channel independently, which distorts colors.
In the attached IJ1vsIJ2.png I created the bottom two images in IJ1 by floodfilling with blue and drawing white and gray lines. The top two images show how these are rendered in IJ2.
IJ2 introduced the concept of an independent LUT min/max for each index of the CHANNEL dimension. However in this case when the CHANNEL dimension is RGB you want the same LUT min/max for each channel, as in IJ1.
(All display issue tickets involving bad colors should be re-evaluated after this is fixed.)
Attachments
Change History
Changed 2013-05-13T17:04:22-05:00 by aivar
- attachment IJ1vsIJ2.png added
comment:1 Changed 2013-05-15T12:37:56-05:00 by curtis
ImageJ1 actually does also support independent min/max per channel. But you're right that in the case of RGB, the initial ranges should match by default. ImageJ1 has hardcoded behavior where 8-bit data does not autoscale, so it is not a problem for 24-bit RGB. For "48-bit RGB"—i.e., 16-bit, 3-channel composites—I have not investigated thoroughly, so do not know what ImageJ1 does.
comment:2 follow-up: ↓ 3 Changed 2013-05-24T16:57:42-05:00 by aivar
- Summary changed from IJ2 color ranges improperly initialized to IJ2 true color ranges improperly initialized
After I mentioned this bug in the chat today it was pointed out that false color images are more important in IJ and the default behavior is the right behavior for these.
So the bigger issue is to have a way to distinguish true color vs false color and treat them differently. I modified the title of this ticket to say "true color".
comment:3 in reply to: ↑ 2 Changed 2013-05-25T10:03:43-05:00 by curtis
Replying to aivar:
So the bigger issue is to have a way to distinguish true color vs false color and treat them differently.
Fortunately SCIFIO & Bio-Formats support such a distinction. The metadata does not propagate anywhere into ImgLib2's metadata yet, but doing so will be straightforward. Though actually, we probably want to store such things independent from the Img itself, for extensibility; see ticket #1890 for details.
comment:4 Changed 2013-12-06T17:39:01-06:00 by aivar
- Owner changed from aivar to curtis
- Status changed from new to reviewing
Comparison of IJ1 vs IJ2 display of same two color images.