Hi Fred,
in principle one could fix this in the 'Set' dialog of Window/Level, but
I fear that there are aboput a hundred places in ImageJ where pixel
values or calibrated coordinates are shown with two digits behind the
decimal point.
In principle, ImageJ has a function
IJ.d2s(value, significantDigits, maxDigits)
which automatically switches to scientific notation and could be used in
all these places, but then there is the problem how many significant
digits to display. If the pixel values are all between 10000 and 10001,
one should have more digits behind the decimal point than for pixel
values between -10000 and +10000.
In most cases, displaying 7 significant digits (roughly the accuracy of
32-bit floating point numbers) would be too much, not user friendly.
My usual solution is using a unit for the pixel values where typical
values are in the range of tens or hundreds.
E.g., for high-resolution STM images (where the pixel value corresponds
to height and the noise is on the order of 1 picometer), I use
picometers as the unit of the pixel values.
Michael
________________________________________________________________
On 05.09.24 21:51, Fred Damen wrote:
Greetings,
As I deal mainly with 32bit images in there appropriate units - viz values
generally not within the range normal for images, it is frustrating that I
need to do a histogram to determine the values for W&L. The main W&L
window value display crops off at too few pixels, and the set window
rounds to 0.00. I would propose the W&L main window preset the length of
the Label field to the width of the window, and scientific notation used
when appropriate.
See attached image, or run below.
newImage("r", "32-bit noise", 128, 128, 1);
run("Multiply...", "value=0.000001");
run("Enhance Contrast", "saturated=0.35");
run("Histogram", "bins=256 use x_min=-3.111E-6 x_max=3.281E-6 y_max=Auto");
selectImage("r");
// W&L/Set...
run("System Clipboard");
saveAs("PNG", "/tmp/Clipboard.png");
Thanks in advance,
Fred
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