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Below are images from the field tests of the DISR camera. All captions for images were written by Bashar Rizk, head of the imaging team. In order to get the full effect of these images, it is recommended that you trun off automatic image resixing on your browser. For Internet Explorer, select"Internet Options" under the Tools menu of your browser window and click the tab for "Advanced." From here, scroll down to "Multimedia Options" and uncheck the box for "Enable Automatic Image Resizing." Depending on your security setting, you may need to turn automatic resizing back on when viewing other sites.


Picacho Peak Images

This image quality is comparable to the quality of pictures we hope to gain from investigations on Titan. For more information about the formation of these mosaics, please see the DISR cameras page. These mosaics are tests done with the instrument near the Picacho Peak area between Tucson and Phoenix. Thanks to Mike Bushroe and Marty Tomasko for copies of these images.



LPL Rooftop Images taken with the DISR Field Test Unit

This set of images was taken with the DISR test unit from the roof of the University of Arizona's Kuiper Space Sciences building. These images--while low quality--display the technique of splicing individual images together to form a mosaic.

Black & White Images:
To construct any of these projections, the direction of every pixel in each of the three imagers was measured and expressed as a nadir and azimuth angle in a spherical coordinate system centered on the imager in question. Parallax due to coordinate center offsets was ignored. The distortion due to the optical systems was removed using an empirically-derived unwarping function. The images were projected onto a mosaicking plane using one of several projection algorithms (mercator, conic, stereographic or gnomonic) defined below, causing the various images to be spliced together.)

Color Images:
By dividing the spectra recorded by the downward-looking visible spectrometer (DLVS) into three color bins (Red, Green and Blue) and comparing their intensities with that of a bin covering the same spectral region as that of the DISR imagers (HRI, MRI and SLI), a fairly decent colorization was implemented. Possessing the relatively low spatial resolution of the DLVS (4 by 4 degrees) the coloring of the DISR imagers looks impressionistic, but succeeds in capturing the various large surface units of the images, including the grass, the concrete and the bricks.

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Team & Instrument Test Site Images

Thank you, Mike Bushroe and Bashar Rizk for the use of these photos. (speech bubbles purely optional)