http://imagej.273.s1.nabble.com/Remove-slices-from-a-virtual-stack-tp3690894p3690900.html
Yes, that's exactly it. I've included it in my plugin as a command
is a job I have to do quite often. It's now basically instant instead
> I thought there was already a deleteSlice(int n) method in
> VirtualStack.java. Is that what you used?
>
> Bill
>
> Michael Doube wrote:
>
>> Never mind,
>>
>> I discovered the VirtualStack class and hacked a very quick plugin:
>>
>>
http://github.com/mdoube/BoneJ/blob/master/src/org/doube/bonej/VirtualDelete.java
>>
>>
>> Mike
>>
>> Michael Doube wrote:
>>
>>> Hi all
>>>
>>> Is there a quick way to remove slices from a virtual stack?
>>>
>>> I have several GB of microCT slices that I drag 'n drop in their
>>> directory (i.e. drag 'n drop the directory), but then I want to
>>> remove the first 300 or so slices and the last 300 or so slices so
>>> that I can crop the stack without running out of RAM (the result of
>>> the crop operation is not a virtual stack so must be smaller than
>>> IJ's allocated memory).
>>>
>>> I have automated a slice range deletion with this macro, however it's
>>> very slow as it has to open each image before deleting it.
>>>
>>>
>>> macro "Delete Slice Range [b]"{
>>> Dialog.create("Delete Slice Range");
>>> Dialog.addMessage("Inclusive range of slices to delete");
>>> Dialog.addNumber("First", getSliceNumber());
>>> Dialog.addNumber("Last", getSliceNumber());
>>> Dialog.show();
>>> first = Dialog.getNumber();
>>> last = Dialog.getNumber();
>>> setBatchMode(true);
>>> deletable = last - first +1;
>>> for (deleted = 0; deleted < deletable; deleted++){
>>> showStatus("Deleting slices...");
>>> showProgress(deleted/(deletable-1));
>>> setSlice(first);
>>> run("Delete Slice");
>>>
>>> }
>>>
>>> }
>>>
>>>
>>> Can I simply dereference the images on the hard disk from the virtual
>>> stack instead? I.e. tell the the virtual stack to no longer include
>>> images within a specified range? Another approach might be to create
>>> a new virtual stack with the desired images by defining the new slice
>>> range in File->Import->Image Sequence... and closing the original.
>>>
>>>
>>> Mike
>>>
>>>
>>