This is an archival copy of the Visualization Group's web page 1998 to 2017. For current information, please vist our group's new web page.
XV at NERSC
Table of Contents
- Description
- XV is an interactive image display and format conversion utility for use on Unix/X11 systems.
- Features
- Image display, crop, rotate, scale, gamma correction, color table manipulation, format conversion, etc.
- Accessing XV
- XV is available on the LBL software farms, and on several NERSC platforms via the modules facility.
- Documentation
- Links to online HTML manual pages (local / distribution website) and downloadable documentation (multiple formats).
- Additional Resources
- Links to the XV distribution site, supplemental information, and an FAQ page.
Sample Screen Shots.
Description
- XV is an X11 program that displays images in a variety of formats (GIF, JPEG, TIFF, PBM, PGM, PPM, X11 bitmap, Utah Raster Toolkit RLE, PDS/VICAR, Sun Rasterfile, and PM formats.
- XV will also read compressed versions of these files.
- XV is copyrighted. Version 2.x was free, but versions 3.0 and later require a fee. Computing Services has a site license for all users of UNIX systems supported by the UNIX Group and NERSC.
Features
- Display an image in a window on the screen.
- Display an an image on the root window, in a variety of styles.
- Grab any rectangular portion of the screen and turn it into an image.
- Arbitrarily stretch or compress the image.
- Rotate the image in 90-degree steps.
- Flip the image around the horizontal or vertical axes.
- Crop a rectangular portion of the image.
- Magnify any portion of the image by any amount, up to the size of the screen.
- Determine pixel values and x,y coordinates in the image.
- Adjust image brightness and contrast with a gamma correction function.
- Apply different gamma functions to the Red, Green,and Blue color components to correct for non-linear color response.
- Adjust global image saturation.
- Perform global hue remapping.
- Edit an image's colormap.
- Reduce the number of colors in an image.
- Dither iN color and b&w.
- Smooth an image.
- Crop off solid borders automatically.
- Convert image formats.
Accessing XV
To access XV on NERSC platforms, use the modules facility as follows:
% module load xv
Documentation
- Local html manual for xv 310a for online viewing
- Individual links to local documentation pages
- Online manual at distribution web site
- XV standard Man page
Local Documentation Downloads: (Use shift left-mouse to download files)
- Tar file containing html pages for xv 310a for download.
- Postscript documentation file for xv 310a for download.
- Pdf documentation file for xv 310a for download.
- Man Page documentation file for xv 310a for download.
Additional Resources
- XV Distribution web site.
- Supplemental information (source, binaries, manuals, patches).
- Frequently Asked Questions (FAQ).
- Graphics/Visualization software support at LBNL & NERSC.
Sample Screen Shots
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