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This paper presents a variational method for SAR image segmentation that unifies boundary- and region-based information into the geometric active contour model. A new Riemannian metric is introduced to construct region-based energy function derived by maximizing the geodesic distance of a new Riemannian metric in differential-geometric structure for spectral density functions. A heterogeneity indicator...
Classification of images based on the feelings generated by each image in its reviewers is becoming more and more popular. Due to the difficulty of gathering training data, this task is intrinsically a small-sample learning problem. Hence, the results produced by most existing solutions are less accurate. In this paper, we propose the semi-supervised hierarchical classification (SSHC) algorithm for...
This paper proposes a new Synthetic Aperture Radar (SAR) image segmentation method based on the frame of Signature/Earth Mover's Distance (EMD). Firstly, Random Projection is used to extract features of SAR image, which has the abilities of preserving information and reducing dimensionality. Secondly, a signature is used to obtain the cluster center and the weight. Finally, by computing the distance...
Photometric stereo algorithms produce a map of normal directions from the input images. The 3D surface can be reconstructed from this normal map. Existing surface reconstruction works often assume the normal map is integrable but contaminated by small scale non-integrable noise. However, real surfaces often contain large discontinuities such as occlusion boundaries and sharp depth changes, which break...
In order to improve real-time and robustness of the lane detection and get more ideal lane, in the image preprocessing, the filter is used in strengthening lane information of the binary image, reducing the noise and removing irrelevant information. The lane edge detection is by using Canny operator, then the corner detection method is used in getting the Image corners coordinates and finally using...
Aiming to the characteristics of airborne infrared image and digital raster graphic, a hierarchical registration method based on feature is proposed. Firstly, the perspective distortion and rotation of the infrared image are corrected. Secondly, the log-polar technique based on edge features is implemented in order to achieve the preliminary registration result. Thirdly, matching points are selected...
With the guidance of digital image technology, this paper has studied the edge testing algorithms of vehicle logo, discussed the treatment effect of Sobel operator and Laplacian-Gaussian operator. A serious comparison between the two operators has been made, and an improved Sobel operator has been proposed.
A new and rapid scheme for detecting vehicles based on video by single camera at urban intersection is proposed. Firstly a rapid judgment algorithm of vehicle direction is introduced, with motion object segmentation by means of frame-difference method and morphology. It extracts the unique interested region from multiple objective through the modified region-growth algorithm, gets motion direction...
This paper presents a splicing method which is based on the edge detection of SUSAN and artificial fish-swarm algorithm, which solved splicing method about the pictures of seldom characters. Firstly, the images are detected edge by SUSAN algorithm. Secondly, it is removed noise according to the morphological method, and it is blocked by edge. Lastly it obtains the extreme points by artificial fish-swarm...
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