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This paper presents a novel extrinsic calibration method based on four-layer laser and a camera, In the case of camera intrinsic parameters are known, we can obtain the corresponding points on a set of laser data and image feature points by using the same feature that both captured by laser and camera, which followed by acquiring the extrinsic parameters of sensor sysems according to the projective...
Straight line is an important descriptor in image analysis. The drawbacks of traditional straight line parameters extracting methods are anal sized, and a novel multi-line parameters extracting method is proposed. Firstly, the image is divided into blocks, and RHT (random Hough transform) is used to detect straight line parameters in each sub-image. Then, global parameters are extracted based on the...
The electronic mail (e-mail) concept makes it possible to communicate with many people in an easy and cheap way. Though email brought us such huge convenience, it also caused us trouble of managing the large quantities of spam mails received everyday. Without appropriate counter-measures, the situation seems to be worsening and spare email will eventually undermine the usability of email. To efficiently...
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