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So far, driving wireless capsule endoscope(WCE) in the intestine forward from the outside of the body is challenging due to its soft, winding and smooth properties. A potential approach to propelling WCE forward is rotating it by magnetic fields. To investigate WCE's efficiency of translational movement when it was rotating, nine capsules mounted spirals with different diameters and lead angles were...
This work fabricates four spiral-type capsules with magnet rings. A small magnetic driving equipment, including a stepper motor, a power supplier, a motor controller, a motor driver, and two bar magnets, was developed. The bar magnets were attached oppositely on the axis of motor, and the rotational speed of motor can be adjusted conveniently. The rotational magnetic fields can be generated when the...
In order to improve the quality of the defocus blurred image, the defocus point spread function (PSF) of the imaging system needs to be estimated. A blind image restoration algorithm was proposed, in which the defocus PSF of the blurred image was estimated through error-parameter estimation method. Firstly, the error-parameter curve was generated through Wiener filtering algorithm. Then, by analyzing...
In order to improve the quality of images, an image super resolution reconstruction algorithm based on initial value estimation is proposed. In iterative back projection (IBP) algorithm, the reference image is restored through Wiener filtering. Bilinear interpolation is performed on the restored image, other than interpolating the reference image directly adopted in the traditional methods. The generated...
In order to improve the spatial resolution of the super resolution reconstructed image, an improved image super resolution reconstruction algorithm is proposed. In iterative back projection (IBP) algorithm, the initial value is estimated through wavelet locally adaptive interpolation method, other than in the traditional interpolation way. Image super resolution reconstruction is performed on multiple...
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