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In recent years, the architectural, engineering, construction and facilities management industry is going through a vigorous development phase. This paper aims to present the application of Building Information Modeling (BIM) and 3D laser scanning technology in construction quality control and management.A novel construction quality control method, combined with BIM and 3D laser scanning technology, focusing on large engineering in complex structure and environment was applied in this paper to provide a reliable basis for the construction of the subsequent process, by measuring the entities to achieve a precision construction quality control.This paper also proposes an effective construction quality inspection and evaluation method based on statistical parameters.

A novel ultrasonic flow velocity estimation method employing the two-dimensional (2-D) frequency shift track is proposed. By representing the backscattered echoes from human blood in the 2-D frequency domain, this paper shows that the velocity profile measurement using pulsed-wave Doppler ultrasound and the moving target track in image processing are isomorphic problems. Therefore, feature template matching based on geometric moment invariants can be used to track the 2-D frequency shift from which the velocity is estimated. Then we discuss the characteristics of the moment invariants and present correlation coefficient as a tracing strategy. The experimental results show the method can overcome the disadvantage caused by frequency-dependent attenuation and get better effect in velocity profile estimation.

In this paper, a novel multiscale speckle suppression method is proposed for ultrasonic images. An original image is transformed into a multiscale curvelet domain and the thresholding estimators are derived for processing the curvelet coefficients of detail subbands by successively combining the SURE-LET approach with the neighboring windows. In order to reduce the curvelet-like artifacts, the shrinkage results are further processed by a nonlinear diffusion scheme. We test the performance of this new technique using synthetic speckle images and real ultrasound images. The experimental results demonstrated, in comparison to other competitive existing methods, this technique could effectively eliminate the speckle noise, while preserving the detailed structures.