CRISTAL Image Resolution:

Because of the limitations of the hardware employed in this
research (ie. image acquisition and resolution), the planar
videographic dimensioning techniques that are used by the VCAD
system do not approach the accuracy of photogrammetric methods. 
However, the VCAD system may be enhanced by the use of high
resolution stereoscopic image pairs from metric cameras, laser
calibration systems, and edge detection methods which have
demonstrated potential for providing results with an accuracy of
exceptional tolerance (within millimeters).  Image resolution can
be enhanced by using high resolution (1000-2000 dots per inch)
digital scanners to transfer drawings, photographs, and slides
into the computer, surpassing the image quality of the lower
resolution "frame grabbing"  process.  In addition, opportunities
for using high definition video, which can generate digital
images with resolutions of up to a thousand lines per inch (or
more), should be explored.

<dfile52>   CRISTAL: Image Processing
<dfile53>   CRISTAL: Dimensional Analysis
<dfile60>   CRISTAL: Limitations 1.
<dfile62>   CRISTAL: Summary