초록 ▼

Automatic thread detection in association with imaging with relies on a backscatter detector and illumination by a flying spot source of penetrating radiation. The digital backscatter image is processed to produce a histogram. The histogram is compared to a predetermined threat characteristic and an

Automatic thread detection in association with imaging with relies on a backscatter detector and illumination by a flying spot source of penetrating radiation. The digital backscatter image is processed to produce a histogram. The histogram is compared to a predetermined threat characteristic and an alarm is sounded if the histogram exceeds the threat characteristic. The threat characteristic is derived in an empirical fashion and automatically modified based on sensing selected parameters associated with the scanning. Operator control over the threat characteristic is also implemented. The flying spot source is also associated with a transmit detector to produce a transmit image. The transmit image is also processed against predetermined parameters for threat assessment. The predetermined parameters are also operator variable.

대표청구항 ▼

A threat detecting system comprising: an illumination source comprising a flying spot of penetrating radiation, conveying means for transporting an object to be inspected through an inspection field swept by said flying spot of penetrating radiation, first radiation detecting means, located between

A threat detecting system comprising: an illumination source comprising a flying spot of penetrating radiation, conveying means for transporting an object to be inspected through an inspection field swept by said flying spot of penetrating radiation, first radiation detecting means, located between said illumination source and said conveying means, for detecting radiation scattered by an object transported through said inspection field and for developing a sequence of scatter signals representative of a sequence of scattered radiation, processing means responsive to said sequence of scatter signals for determining whether or not said object poses a threat, said processing means including: distribution means responsive to said sequence of scatter signals for determining scatter signal intensity distribution, means for comparing said scatter signal intensity distribution to a characteristic of limiting signal number at each of a plurality of signal intensities, and alarm means for generating an alarm only if said scatter signal intensity distribution exceeds said characteristic of limiting signal number for an intensity for which said characteristic is defined.