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A portable three-dimensional vision coordinate measuring system capable of determining the six degrees of freedom (6DoF) is proposed in this paper. This cost-efficient test equipment is intended for use in manufacturing and assembly processes, such as the alignment process of aircraft stations. The three-dimensional vision coordinate measuring system is a low cost line-of-sight (LOS) system. It is capable of measuring large objects in the field, and has reduced setup times, as compared to other test measuring systems. Whereas conventional coordinate measurement systems provide three dimensional measurements in a Cartesian coordinate system, the system proposed in this paper is capable of determining yaw, pitch, and roll with respect to a camera. The three-dimensional vision coordinate measuring system consists of light-emitting diode (LED) planar target, a high resolution camera, and a laptop computer. The equations of the three-dimensional vision coordinate measuring system are derived from analytical geometry and the perspective of three collinear points. This paper explores techniques to measure the 6DoF of a LED planar target in monocular image. Experiments confirming the validity of the three-dimensional vision coordinate measuring system are included in this paper.

This paper proposes an improved pre-equalization approach for the transmitter in the new high speed communication IEEE 802.3ba 40G/100G Ethernet standards. It is noted that the new 64b/66b encoder, for the above standards, causes a shift in the signal's power spectral density. Preliminary results show that the power shift is not uniform. Depending of the bit rate, in some cases the encoder shifts the spectrum from the low frequency to the high frequency region of the spectrum; at other bit rates is the opposite. This problem is compounded by the attenuation of the signal caused by the frequency response of a typical physical channel. In this paper, a transmitter pre-equalizer is proposed that compensates for this spectrum shift. In addition, this approach is aimed at emerging high speed data standards which are transmitting at 25 Giga bits per second (Gbps) on a single trace using the 64b/66b encoder. Based on our previous experience, a receiver equalizer will be proposed to enhance the performance legacy backplanes so that they can work up to the 25 Gbps speeds.