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Medical image processing plays an important role in supporting the diagnosis of various diseases. Brain magnetic resonance imaging (MRI) image is widely used to support the decisions from doctors who will decide if there are any issues in a brain. The essence of the MRI is segmentation which is the basic for damaged area selection, quantitative measurement and 3-dimensional reconstruction. In order...
Under the environment of big data, retrieval becomes a crucial technology and image retrieval is paid more attention and widely used. The paper proposes a second-order retrieval algorithm, of which can be used to retrieval the similar images. Firstly, extracting image sift features. Then, build frequency table of characteristic words by k-means clustering and bag of word algorithm. Finally, based...
We formulate multiple object tracking (MOT) as a Generalized Maximum Multi Clique problem (GMMCP) without any simplified version in problem formulation or optimization, which makes full use of image evidence. Afterwards, we solve the GMMCP through Mixed Binary-Integer Program (MBIP) and obtain the final motion trajectories of the multiple objects. In order to improve the algorithm's performance, we...
Diagnosis of rice planthopper pests based on imaging technology is an efficient means to develop intelligent agriculture. Effective contour automation extraction is an important pretreatment technology at the early stage for identifying and classifying rice planthoppers. For the curtain as the background contained texture structures and resulted in a heterogeneous texture in the sensed image, which...
Digital image contour is rich in image information, many applications are based on accurate tracking of the target contour. Image contour features fuzziness and non-uniformity, so that contour extraction method based on automatic delineation can easily cause inaccurate partition, while manual partition method has poor efficiency and instantaneity. Considering accuracy and efficiency of two-dimensional...
In the field of remote sensing, the vibration caused by satellite platform would affect the captured image quality. So the fast image restoration method is proposed in this passage. Combining the vibration detection and coded exposure, this method can remove vibration blur from a single remote sensing image. The vibration is detected by fiber-optic gyroscope, and the PSF is calculated from the vibration...
Retinex is a theory on the human visual perception. It explains an object's color is determined by its reflectance. The classic Retinex causes the problems of halo, color distortion and noise, etc. In order to solve these problems, In this paper, we present a algorithm that combining with Nonlinear Image Enhancement and Guided Filter to estimate the reflection components under Retinex frame work....
The construction of statistical shape model (SSM) is an important research topic in medical imaging benefited from its robust and nature represent of anatomical structures. Place-march of corresponding landmarks is one of the major factors influencing 3D SSM quality. In this paper, we present a supervised correspondence method for fast building SSM, which includes two main steps, i.e., surface data...
As an important research area in image analysis and computer vision, fusion of infrared and visible images aims at delivering an effective combination of image information from different sensors. Since the final fused image is the demonstration of fusion process, it should reveal both source images' vital information distinctly. To achieve this purpose, an image fusion method based on multiscale hybrid...
Single image super-resolution (SR) generates a high-resolution (HR) image by estimating the mapping function between image patches of different resolutions. By leveraging the notion of regression, the mapping function estimation task is often transformed into predicting mapping function's derivatives. Although higher-orders of derivative lead to a more accurate mapping function, current algorithms...
Colon cancer is the second leading cause of cancer-related death in the United States, and can be prevented by the removal of precancerous colon polyps. For colon diagnosis, computed tomography colonography (CTC) has been proposed as a minimally invasive technique, and computer aided diagnosis (CAD) systems using CTC data are a rapidly evolving tool to localize, detect, and identify colon polyps....
The aim of this study is to evaluate the spatial-temporal patterns of the ankle joint and knee joint in healthy young individuals during level walking with different speed and during uphill walking with different grade. Ten healthy male individuals participated in this study. Individuals walked with greater maximum knee flexion and ankle flexion angles during late stance in the fast level walking...
The function of visual attention mechanism is to acquire the useful visual information at the fastest speed. The Itti visual attention model commonly used at present has achieved good effects in natural image. In order to find the region of interest as soon as possible, this paper attempts to introduce visual attention mechanism into pulmonary nodules detection. However, the Itti model is more to...
In order to reduce the image matching errors caused by many factors, the method based on k nearest neighbors support feature points was proposed. When ratio is little, get the support feature set by Scale Invariant Feature Transform and choose the k nearest neighbor (KNN) points from the set as the supporters. According to the similarity of supporters around the matching point, determining the matching...
This paper introduces an improved method of nonlinear distortion correction for wide-angle lens. The method is to cast chessboard image to the billiard table by the projector according to the given parameters, then to extract sub-pixel corners from the chessboard image collected by camera and establish fitting relations between coordinates of camera image and that of computer screen with the binary...
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