> On Aug 14, 2024, at 9:17 PM, Kenneth Sloan <[email protected]> wrote:
>
> I have been making more and more use of the Calibration feature to establish
> custom coordinate systems for images. I note that when an image is re-sized
> (and presumably cropped, although I haven't tested this yet), the Calibration
> remains the same.
The calibration is updated when an image is resized, as this example script
demonstrates.
imp = IJ.openImage("http://imagej.net/images/ct.dcm.zip";);
cal = imp.getCalibration();
IJ.log("Pixel width (before) = "+cal.pixelWidth+" "+cal.units);
imp = imp.resize(imp.getWidth()/2,imp.getHeight()/2, 1, "bilinear");
cal = imp.getCalibration();
IJ.log("Pixel width (after) = "+cal.pixelWidth+" "+cal.units);
imp.show();
This is the output:
Pixel width (before) = 0.5968470955331366 mm
Pixel width (after) = 1.1936941910662733 mm
> Is it possible for operations such as "resize" to update the Calibration, if
> one is attached to an image? It seems obvious to me (perhaps it's not
> obvious?) that xOrigin, yOrigin, pixelHeight, pixelWidth can all be modified
> in a straightforward way.
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