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Camera pose estimation is a basic step in many computer vision applications. In Tensor-based Novel View Synthesis (NVS), the simple camera pose estimation proposed by B. Rousso is limited to wider applications, for it needs a full calibration, and small rotation is assumed. To improve the synthesis performance, the author applies the simple six-point estimation algorithm to NVS, which is easy to understand...
Real-time interactive on documents can enhance effectiveness of learning in modern education. A pen capable of locating on a screen is one significant choice. Some products have been developed and the nib of pen is used as the emitter. However, the pen might fail to be located while our body or hand would block the light wherever the photo detector is. In this paper, we have proposed a scheme to solve...
In order to detect geological bodies which harm to the safety production of mine, such as faultage, fold, coal bed attenuation region, falling post and so on, a resistivity tomography instrument is developed according to the requirement of explode-proof requirements. The potential channel and the current channel of the instrument are independent, and each channel has two grade active low-pass filter...
This paper presents a novel method to increase the signal to noise ratio in MIT data acquisition by exploiting transient process analysis. In front-end circuits for inductance measurements in MIT, a critical step is the phase sensitive demodulation, which includes a low pass filter. When the excitation source is switched from one coil to the next, a transient process occurs as the received voltage...
We present a novel system for visual based contour tracking and apply it to track the movement of human's head. Currently available technology is used in the implementation to take care of low level video processing and acquisition. The implementation consists of two main parts. First, there is an error sensitive Gaussian particle filter. It estimates the posterior density of the shape being tracked...
Seagrass, mainly distributed in the coastal water along South China Sea, is very important for coastal ecosystem. In order to obtain precise data about seagrass distribution in optical shallow water in Xincun Bay of Hainan province, Quickbird data was used in the paper. Radiance transfer model in optical shallow water was used to retrieve the information of bottom reflectivity, and supervise classification...
This paper suggests a novel MRI image compression scheme, using the discrete wavelet transformation (DWT) and an improved Bayesian restoration approach. The suggested methodology is based on preservation of important second order correlation (ldquotexturalrdquo) features of either DWT coefficients or image pixel intensities. While rival image compression methodologies utilizing the DWT apply it to...
Seam tracking performance of an arc welding system is crucial to achieve high-quality welds. Visual sensing is one of the most attractive approaches to detect the seam position in the welding process, which provides valuable information to control the arc following the expected path. However, it is difficult to accurately detect the seam position adjacent to weld pool due to strong light disturbance...
In this paper, we introduce a new implementation of motion-compensated temporal filter (MCTF) based video coder which utilizes rate-distortion optimal wavelet packet transform (RDWP) for some low bit rate video coding application scenarios. Although enhanced MC-EZBC video coder provides good scalability and high coding efficiency at high bit rates, reconstructed video quality will drop rapidly with...
The automatic identification method for the clamping point of a workpiece based on the solid model was proposed. The concept of force polygon was presented in brief; with the adoption of reduction method of the projecting outline of the workpiece and the help of the reduced polygon of the workpiece, the feasible clamping district for given workpiece could be determined. The feasible clamping plan...
This paper presents a stereo image coding method. We first use a new stereo matching method with difference-based adaptive searching windows to get the fine disparity. Then, we encode the disparity instead of one channel of the stereo image while the other channel is encoded normally. The stereo matching employs the continuity of difference of stereo images to compute the size of adaptive searching...
An industrial robot equipped with a camera system requires robust and accurate estimation of the pose of a target object. The pose estimation is achieved by a three-dimensional registration method. This paper presents this novel method for the registration of the rotated and translated part according to its camera images and three-dimensional model. The spatial registration parameters can be computed...
A new method for testing the parameters of fiber optic imaging devices (fiber optic taper, fiber optic faceplate and fiber optic inverter) featuring a single integral sphere and a CCD camera is put forward. Compared with the method of two integral spheres with photoelectric detector, this method features simply structure, wealth information and fast testing operation. It can realize the measurement...
One channel capacitance tomograph was described. Its modular design gives the opportunity to test different measurement circuits. Described tomograph use measurement circuit based on CDC (Capacitance-to-Digital Converter). Control unit of the tomograph was implemented inside FPGA as a microprocessor system with hardware implementation of image reconstruction algorithm. The Landweber iterative image...
To get the good performance of infrared face recognition from the biological feature and statistical character, a novel method for infrared face recognition based on blood perfusion and fisher linear optimal discrimination is proposed in this paper. Firstly, thermal images are converted into blood perfusion domain by blood perfusion model to enlarge between-class distance and lessen within-class distance,...
Images obtained in bad weather such as haze, fog may have low contrast, particularly towards the top of the image. The technical challenge is to reverse this process - provided with just the ldquofoggyrdquo scene, estimate the contribution due to optical scattering and so recover the original scene. This is possible for a general flat-field scene and a forward-looking camera, although there are some...
A novel methodology deals with the peaks overlapping issue in quantifying metabolites in MRSI is proposed in this paper. The introduced method encounters the metabolites quantification procedure as a typical optimization problem able to be solved by using optimization methods of the computational intelligence. A simple genetic algorithm is applied in order to find the metabolites peaks parameters...
In order to detect moving object by a rotated camera in video surveillance, block-based motion estimations (BME) are performed first and global motion parameters are estimated. A novel search algorithm that based on Kalman filter is proposed. The algorithm is a kind of block-matching motion estimation algorithm. First feature points are extracted from current frame and then feature points are used...
This paper introduces a robust and reliable method of human body recognition for visual surveillance systems. The method is developed based on the skeleton of moving object, which can be got by an improved thinning algorithm. In the paper we first describe some thinning algorithms for binary images, including OPTA thinning algorithm, Zhang's thinning algorithm and Rosenfeld's thinning algorithm. Comparing...
The technologies for image contrast enhancement are improved evidently since the popularity of consumer electronics and image processing in the last decade. Based on histogram equalization (HE), this paper proposes a simple contrast enhancement scheme named adaptively increasing the value of histogram (AIVHE). It provides a convenient and effective mechanism to control the rate of contrast enhancement...
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