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With the rapid development of stud welding technology, weld studs are extensively used in automobile industry. A weld stud differs from a regular stud in that it has special external features. This study develops a novel non-contact, fast, and high-precision method based on monocular vision for measuring the position and attitude parameters of a weld stud. Under this method, the measuring principle...
In this paper, we proposed multi-modal medical image registration method, which introduces mathematical morphology into image processing, and makes full use of the non-linear multi-resolution of the morphology Haar wavelet; the image pyramid is constructed according to the different resolution, which can enhance the speed of the registration. Genetic algorithm (GA) is used to accurately obtain the...
Halftone image is a binary image that preserves the visual quality from the original continuous-tone image, and it is used for printing and output devices. In this paper, an improved error-diffusion with human visual system (HVS) model and first-order gradient shaping filter is proposed. The details of local edges are reflected, and it presents better halftone images. First, Floyd-Steinberg error...
Utilizing the complexity and good pseudorandom property of the spatiotemporal chaotic system, a novel image encryption algorithm is proposed. The plain-image block data is masked by the values extracted from the spatiotemporal chaotic system. Then the masked data is shuffled according to the maximum state value in the system. A cipher block chaining (CBC) mode is employed to adjust the state value...
A novel adaptive randomized Hough transform using moving window for circle detection was proposed. In the method, circle detection is done by the standard randomized Hough transform, with a moving window to increase local signal-to-noise ratio for improving the detection rate. Parameters of the randomized Hough transform are set adaptively according to the currently windowed image part to reduce the...
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