Milestone LPR 1.0 Manual de usuario descargar pdf (Pagina 38)

Milestone XProtect

LPR 1.0

Administrator's Manual

www.milestonesys.com

About LPR cameras

interfere with the algorithms used in the LPR process. It is therefore recommended that you

disable cameras’ contour, edge and contrast enhancement algorithms whenever possible.

 Automatic compression: High compression rates can have a negative influence on the

quality of license plate images. When a high compression rate is used, more resolution (see

"Resolution" on page 36) is required in order to achieve optimal LPR performance. If JPEG

compression is used, it will have almost no negative influence on license LPR, as long as the

images are saved with a JPEG quality level of 80% or above, and images have normal

resolution, contrast and focus as well as a low noise level.

Left: License plate image saved with a JPEG quality level of 80% (i.e. low compression); acceptable

Right: License plate image saved with a JPEG quality level of 50% (i.e. high compression); unacceptable

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Milestone LPR 1.0 Manual de usuario Pagina 38