With a huge camera on top of it which senses the location of the vehicle by comparing images.
By comparing images made through red and blue filters, the scanner selected the hundred or so reddest objects on the plates for further study.
Mr. Hurd said he was also working on a software program that will help farmers record the data and compare images from year to year.
Image comparison tool for comparing multiple images, including their histograms and metadata.
This enables some applications, such as a device that compares images in an optical way.
The average human won't notice unless they compare images.
Compare new and archive images to chart changing landscape.
But when he compared images from a couple of weeks earlier, he could see the difference.
By comparing new facial images to those already in the voter database, authorities were able to reduce duplicate registrations.
Standard illuminants provide a basis for comparing images or colors recorded under different lighting.