Image analysis – Histogram processing – For setting a threshold
Patent
1991-10-11
1994-09-13
Boudreau, Leo H.
Image analysis
Histogram processing
For setting a threshold
382 55, 382 49, 73146, G06K 936, G01M 1700
Patent
active
053475887
ABSTRACT:
A method and apparatus for video imaging of a tire ground contact patch or tire footprint is presented. A digitized image of the footprint is generated as an array of pixels. Each pixel is attributed a binary value of one or zero, to present a two-valued image. Contact areas within the image are attributed a first value, while void or noncontact areas are attributed a second value. The image is then dilated and eroded in an appropriate sequence to eliminate all white pixels from the image and to eliminate surface anomalies or the like which are not of interest in the tire analysis. An image of the footprint, accurate in size and dimensions, is thereby generated and, from such footprint, total area, contact area, and void area can be determined, as well as measurements of width, center line length, and other desired lengths at various lateral width locations. This data may be used to analyze the tire construction, operation, noise generation, and performance.
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Serra, "Image Analysis and Mathematical Marphology", 1982 pp. 43-55.
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"Society of Automotive Engineers," 1986, Analysis of Hydroplaning Photos Using an Image Analyzer by Lawrence G. Jansen; Abstract only.
Boudreau Leo H.
Bridgestone
Prikockis Larry J.
Thomas David A.
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