Posted by
Jim Passmore on
Oct 27, 2008; 3:22pm
URL: http://imagej.273.s1.nabble.com/displaying-16-bit-TIFF-tp3694616p3694617.html
Chuan
Off the top of my head, I think it maps the darkest pixel to 0 and the
brightest to 255, with a linear ramp between the extremes.
from
http://rsb.info.nih.gov/ij/docs/concepts.html16-bit and 32-bit grayscale images are not directly displayable on computer
monitors, which typically can show only 256 shades of gray. Therefore, the
data are mapped to 8-bits by windowing. The window defines the range of
gray values that are displayed: values below the window are made black,
while values above the window are white. The window is defined by minimum
and maximum values that can be modified using
Image/Adjust/Brightness/Contrast.
Jim
----------------------------------------------
Jim Passmore
Research Associate
Sealed Air Corporation
[hidden email]
864-433-2927 voice
864-433-2205 fax
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ImageJ Interest Group <
[hidden email]> wrote on 10/24/2008 07:34:39
PM:
> Hi, folks,
>
> Does anyone know what happens when I open a 16-bit TIFF file? I guess
> the intensity should have been converted to 8-bit so that it can be
> displayed on monitor. I can tell that the conversion is definitely NOT
> like *255/65535. Maybe the conversion was taken according to some tags
> hidden in the file? Any tip is appreciated. Thanks!
>
> Chuan