exrdisplay - Displays an OpenEXR image on the screen.

exrdisplay [options] imagefile

This manual page documents briefly the exrdisplay command. This manual page was written for the Debian distribution because the original program does not have a manual page.

exrdisplay is a program for viewing OpenEXR images on a display at various exposure settings.

-p

displays the preview (thumbnail) image instead of the main image

-l lx ly

displays level (lx,ly) of a tiled multiresolution image

-w

displays all pixels in the data window, ignoring the display window

-a

ignores the image's pixel aspect ratio, and does not scale the image to make the pixels square

-c x

loads only image channel x

-1

sets exposure and knee sliders so that pixel value 0.0 becomes black, and 1.0 becomes white

-n

normalizes the pixels so that the smallest value becomes 0.0 and the largest value becomes 1.0

-A

same as -c A -1 (displays alpha)

-Z

same as -c Z -n (displays depth)

-h

prints these options.

The Viewer has four sliders that you can use to specify how your 16-bit OpenEXR image is displayed on your 8-bit monitor:

Exposure

Sets the apparent exposure of the image on the display. It lightens or darkens the displayed image, allowing you to reveal detail in the high or low end.

Defog

Subtracted from pixel values to compensate for fogging due to stray light in the recording device.

kneeHigh and kneeLow

Pixel values between kneeHigh and kneeLow set the white level of the displayed image, determining which value is mapped to the maximum intensity of the monitor (exrdisplay lets you set the white level between 3.5 and 7 f-stops above middle gray).

This programs is documented with illustrated examples at http://www.openexr.org/using.html

This manual page was written by Andrew Lau <netsnipe@users.sourceforge.net>, for the Debian GNU/Linux system (but may be used by others).