|Cruse Camera Scanner System By Charles Spontelli, Associate Professor, VCT, College of Technology, Bowling Green State University of Ohio|
The Cruse scanner system is a large format (up to 60"x 96" originals) high resolution overhead lens digital copy-stand /scanner. The Cruse produces professional level scans in 48 bit color from a wide array of originals. Since it is basically a vertical copy-stand it will scan just about anything that you can set on the copy-board.
We have tested objects up to four inches tall and the depth of field (at f11) produced an image that was sharp from top to base. I was impressed by the detail of the scan. We placed the hand of one of our assistants on the copy board for one of our test shots. You could easily see every tiny hair and crease of the skin as well as noting that she chewed her finger nails. The high quality optics of this system is very evident in these 3D images. The skin tone color was also a great match to our "hand model".
I also would attribute part of the exceptional detail of the image capture to the high resolution of the CCD scanning head. The system is capable of producing an image of up to 10,048 x 15,500 pixels at a file size of up to 866 MB! This of course would be scanning the maximum size of the copy board.
We also scanned more normal originals including 4"x 5" transparencies on the Cruse's light box. The scans rivaled anything that I've seen coming from a high-end drum scanner. The light box sits on the copy-board and requires switching from the 120mm lens to an 80mm focal length. The switch is done manually with a simple turret mechanism.
All scans are captured in 48 bit color and are post-processed through SilverFast imaging and color management software. The scans are "corrected" by profiles. The profiles are used to compensate for any variation in lighting which is unique to our particular setup. Things such as room ambient light, wall reflections, etcetera are "corrected" by the profiles. Large IT8 targets were scanned as a part of the calibration process. The resulting profiles produced target images with outstanding neutral gray tones and excellent color renditions even into the very dark color tones. The final image is saved in standard 24 bit RGB.
Our Cruse model CS155 has a copy-board of 36" x 48". The images we scanned on the Cruse are of the quality I would expect from any high-end drum scanner. Where the Cruse is different is in its ability to accommodate 3D originals. It could actually be used to do table top digital "photography" with the high frequency daylight fluorescent external light stand. We also have a book holder which accommodates the spine to allow the pages to lie flat while being imaged.
The Cruse is not small. Our model has a 90" wide by 60" deep footprint not including a workstation desk required for the computer that controls the Cruse. There is also a minimum room height of 8'4" to allow for the vertical movement of the lens and imaging head. The tradeoff is that with a "scanner" like the Cruse, you can capture high-end digital images of about anything that will stand still on the copy-board.
*Chuck Spontelli has an MS degree from Rochester Institute of Technology in printing. His specialty is color management. In addition to teaching a wide ranges of topics related to prepress and printing in the College of Technology at BGSU.
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