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Pulsed thermography (PT) is a widely used non-destructive testing (NDT) technique for defect detection in carbon fiber reinforced polymers (CFRP) structures. Thermographic signal reconstruction (TSR) is often employed to process thermographic data due to its excellent performance in enhancing the contrast between defects and background. However, TSR does not reduce the noise of thermographic data...
In this paper, the micro-structure of the Shangjuxu acupuncture point or tissue where there were no acupoints in the fractional rabbit hind limb were studied by in-line phase contrast CT imaging (IL-XPCI-CT) methods based on synchrotron radiation. Then the imaging results are reconstructed in three-dimensional limit, and the 3D images for different tissues are compared. The experiments were performed...
Since the airship-borne camera recorder is easily effected by the complex weather conditions such as fog and haze etc, we adopt the multiple scales Retinex algorithm with color restoration to remove fog. It retains the details of the image enhanced and restores the genuine color of the image. And then the algorithm based on SIFT feature extraction and match in the Euclidean space is utilized to estimate...
A new approach for parallel implementation of synthetic aperture radar (SAR) imaging is presented. This approach is based on time domain correlation (TDC) which reconstructs radar imaging in spatial domain via Fourier transform using wave equation inversion theory. TDC algorithm can be modified for parallel implementation since it reconstructs images via matched filtering without any need for approximation...
Object recognition is one of the hot topics in computer vision. Existing techniques for object recognition are based on image processing, which tends to be incapable to recover the topological information of the object. In this paper, based on the analysis of human perceptual habit, a novel strategy for object recognition is proposed. The method perceives an object in the scene by means of existing...
Object recognition and reconstruction are pivot technologies both in computer vision and in machine intelligence. There are a number of techniques for object recognition, such as pattern comparison, feature matching, and boundary detection and so on, which heavily depend on the rigid depiction of projected images of the object. This consequently results in that even recognized it is still remain tough...
Synthetic aperture radar has been used widely since it can provide high-resolution images. Many imaging methods have been proposed based on Fresnel approximation. These imaging methods are not applicable when synthetic aperture radar works at near field because the Fresnel approximation is completely wrong. Time domain correlation is a kind of digital reconstruction in spatial domain via Fourier transform...
In this work, a novel 3D velocimetry systems based on electrical capacitance volume tomography (ECVT) is introduced. Unlike traditional 2D velocity systems, the current system provides three dimensional velocity maps of multi-phase flows inside a conduit directly from the reconstructed image. Here, the velocity measurement process starts by acquiring capacitance data from the ECVT sensor. An image...
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