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The sputter-deposited Cu thin film, coated with a thinner gold layer, was prepared into the butterfly pattern with alternating zones beween Cu thin film and Si. The eutectic SnPb solder balls with different sizes were reflowed on the butterfly pattern. As a result, the liquid solder would be selectively retained on the Au/Cu film zones. At the same time, under the energy minimization control, the...
The sputter-deposited Cu thin film, coated with a thinner gold layer, was prepared into the butterfly pattern with alternating zones beween Cu thin film and Si. The eutectic SnPb solder balls with different sizes were reflowed on the butterfly pattern. As a result, the liquid solder would be selectively retained on the Au/Cu film zones. At the same time, under the energy minimization control, the...
The MRI or CT scan images are primary follow up diagnostic tools when a neurologic exam indicates a possibility of a primary or metastatic brain tumor existence. The tumor tissue mainly appears in brighter colors than the rest of the regions in the brain. Based on this observation, an automated algorithm for brain tumor detection and medical doctors' assistance in facilitated and accelerated diagnosis...
Current 3D ear identification methods require capturing ear range image data to work. In this work, based on slice curve matching, a new 3D point cloud ear identification approach is presented. Aiming to acquire 3D point cloud ear data in a low cost way, line structure light data sampling system is also introduced in this work. Experimental results and some comparisons show the comparable advantages...
Palmprint verification is a relatively new but promising personal authentication technique for its high accuracy and fast matching speed. Two dimensional (2D) palmprint recognition has been well studied in the past decade, and recently three dimensional (3D) palmprint recognition techniques were also proposed. The 2D and 3D palmprint data can be captured simultaneously and they provide different and...
Several recent research efforts in the hand biometrics have focused on developing contact-free personal identification system. However, the acquisition of images from the unconstrained hands can introduce significant hand pose variations which severely limits the performance and applicability of these approaches. This paper presents a new approach to achieve significantly improved performance even...
The effectiveness of a biometric measurement and sensing system is directly related to the performance generated from sensed data. This paper investigates a new approach to quantify the quality of sensed data from the user templates. The objective is to incorporate the quality of sensed data to generate a reliable estimate on the matching scores. The proposed method of extracting user quality is based...
Image alignment is a crucial step in palmprint verification. However, most of the existing palmprint alignment methods use only some key points between fingers or in palm boundary to extract the region of interest (ROI), which is consequently used for feature extraction and matching. Such alignment methods can only give a coarse alignment of the palmprint images. This paper presents a new effective...
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