XTIFF, MOTIF TOYS, View a TIFF file in an X window (mono and multi-pages) xtiff is a TIFF viewer for X based on the libtiff (3) package. It displays a TIFF file in an X window that can be resized and panned. On appropriate display hardware it can handle 24-bit RGB color TIFF files, 8, 4 and 2-bit palette color TIFF files and 8, 4, 2 and 1-bit grayscale TIFF files. The Next and Previous buttons allow the user to view different pages in a multi-page TIFF file. If the image is larger than the window, you can pan around the image with the mouse or arrow keys. Grab the image by pressing down and holding the left mouse button and then drag the mouse to expose a different region of the image. The arrow keys provide another method for moving a large image inside a smaller window. xtiff manages the negotiation between the needs of an image and the visual capabilities made available by an X server. If necessary, it will promote an image to a deeper visual, but it will not demote an image by quantizing and/or dithering. In that case it will fail to display the image. xtiff reads the "Gray Response Curve", "Gray Response Unit" and "Color Response Curve" tags in a TIFF file. The data in these tags describe gamma compensation or image companding. Together with the -gamma option or the NTSC default gamma value of 2.2, the image will be gamma corrected and displayed. For example, if a TIFF file has been prepared for a typical display, it has a gamma compensation of 2.2 built into either the image or preferably the "Color Response Curve" tag. This is a device-dependent image and, in this case, the value for the -gamma command line option should be 1.0. If the "Color Response Curve" tag describes a companded but otherwise device-independent image then the command line gamma should be set according to the monitor. Unfortunately there is no way of knowing a priori whether or not an image is device-independent without knowing its ancestry. If the image conforms to the TIFF 5.0 specification it should be device-independent; but many scanner and image processing programs do not adhere rigorously to the standard.