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imglib / imglib2

A generic next-generation Java library for image processing
http://imglib2.net/
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Draft: streamify View API #348

Closed minnerbe closed 2 months ago

minnerbe commented 9 months ago

As discussed with @tpietzsch, this is an attempt to create an API for View that's similar to Java streams. The goal would be to allow this kind of syntax:

Img<?> img = ...
Img<?> changedImg =  img.view()
        .translate(1, 2)
        .expandValue(new DoubleType(0), 1, 1)
        .permute(0, 1)
        .collect();

This is still work in progress. One particular limitation I encountered so far is that most methods in Views map RandomAccessibleInterval into RandomAccessible, i.e., they leave their domain, which makes daisy-chaining impossible.

tpietzsch commented 9 months ago

I made a variation with multiple ...View interfaces and wrappers in https://github.com/imglib/imglib2/tree/draft/streamify-views.

Usable like this:

https://github.com/imglib/imglib2/blob/992e3e646d53ad7d4f84cd83bf7770eb4c2164b7/src/test/java/net/imglib2/streamifiedview/StreamifiedViewsExample.java#L14-L25

minnerbe commented 9 months ago

I added a rough draft for converting a RaiView to an ArrayImg. I probably made some errors while trying to wrestle the generic type of the view into a NativeType, but it seems to work for a small test example. What do you say, @tpietzsch?

tpietzsch commented 2 months ago

There is an update version of this PR in #364

imagesc-bot commented 2 months ago

This pull request has been mentioned on Image.sc Forum. There might be relevant details there:

https://forum.image.sc/t/recent-and-upcoming-imglib2-improvements/96083/1