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Rice leaf diseases have occurred all over the world, including china. They have had a significant impact on rice quality and yield. Now, the control method rely mainly on artificial means.In this study, BP neural network classifiers were designed for classifying the healthy and diseased parts of rice leaves. This paper select rice brown spot as study object, the training and testing samples of the...
Facial aging synthesis is one of the main topics in computer graphics. This paper proposes a synthetic approach to 3D aging faces by using color Gabor wavelet and texture transplant techniques. Based on 3D aging templates, the color Gabor wavelet transform is carried out first to extract the high-frequency sub-images from the texture maps, in which is contained the texture feature of aging skin. Then...
In this paper, a novel color image segmentation algorithm is proposed based on color similarity in RGB color space. In our approach, the dominant color is determined firstly; then a scale invariant and semantic mathematic model, called SIMILATION, is exploited to create a color-class map; finally, the information of the corresponding color-class map is utilized to classify the pixels. Experimental...
This paper presents a novel approach to recognize traffic signs using support vector machines and radial Tchebichef moments. More than 3000 real road images were captured by a digital camera under various weather conditions and at different times and locations. After traffic sign is detected from real road images, it is then normalized, and radial Tchebichef moments are computed as the features of...
Take advantage of the feature that the energy of the image would gather and spread on four components in the subimage after first-order GHM multi-wavelet transform. Propose an information hiding algorithm based on modifying the direction of color mod vector structure (CMVS) of four GHM first-order sub-images (LL2, LH2, HL2 and HH2). The direction of CMVS represents the information. The maximum change...
Multi-view video is a new multimedia service which provides interactive experience and depth perception. Color variations between the camera views are necessary to be eliminated in multi-view imaging. In this paper, a dominant color tracking based color correction method for multi-view video is proposed using Kalman filter. It tracks the dominant colors by using Kalman filter to fit the color variation...
The cloud model is good at bridging the gap between qualitatives and quantities, and so it was applied to evaluating mildew degree of rice seeds based on machine vision. A symmetric cloud and two asymmetric clouds were designed to express three qualitative concepts and the relationship between them. These three qualitative concepts represent different mildew degree including non-mildew, spot mildew...
Terrain is hard to simulate and edit in a realistic and convenient way because of its complexity. In this paper, we propose and develop an interactive terrain editing method with OpenGL. Digital elevation model (DEM) is used to create terrain. And technology of terrain geometric editing and terrain texture editing is provided to modify terrain more conveniently. Meanwhile, we propose an algorithm...
Two concealed weapon detection methods based on image fusion are presented. The dual tree complex wavelet transform (DT-CWT) is used to image fusion processing because of its shift invariance and directional selectivity, and it is preferable to traditional discrete wavelet transform (DWT). The fusion rules based on multi-scheme are put forward in the gray visual image and millimeter wave image fusion...
After analyzing the characteristics of virtual endoscopy and volume data visualization, this paper proposes an improved volume rendering algorithm based on interactive dynamic volume rendering algorithm of perspective project volume rendering, which improves the volume rendering speed in the 3D data field of the virtual endoscopy. This algorithm adopts the dynamic data reduction technique. It automatically...
License plate recognition plays an important role in intelligent transport system; however, plate region extraction is the key step before the final recognition. In this paper, an effective license plate extraction algorithm based on vertical edge detection and mathematical morphology is proposed, which can exactly extract the plate from complex background. The proposed algorithm mainly consists of...
As is known to all, there are many kinds of wood. If we distinguish the wood's characteristics by our eyesight, we can't distinguish the category and property of the wood correctly, and this way will cost enormous workload. In this paper, we propose the keyblock distribution based wood image retrieval algorithm, in order to make the wood image retrieval algorithm more precise and objective. Keyblocks...
This paper describes a system for action recognition with a single camera. Firstly, we use a two-layered background subtraction, which is based on both chromaticity and gradient, to extract human contours from the frame sequence captured by camera. This subtraction helps us remove shadows from foreground and get a good contour for recognition. Then we parameterize a human posture with a model called...
This paper proposes a novel key frame extraction method by using color spatial distribution histograms for surveillance video representation and summarization. Pixels in the same color are contiguous or non-contiguous to each other in an image, which is a palpable spatial characteristic. With this attribute, the pixels are classified as contiguous and noncontiguous ones, and then, refined histograms...
In this digital age, with the ease of using digital imaging devices to create digital content or digital copies of analogue content, usage of digital watermarking has steadily increased due to the fact that it allows some form of protection and identification to the owner of the content against unauthorized copy or usage of the content. Visible watermarking is often the choice of content owners when...
-This paper describes an improved segmentation algorithm based on Minimum Spanning Tree (MST) for content-based image retrieval system. MST segmentation is computationally efficient and captures both global and local image information, but it is prone to incur over-segmentation because of its neighbor system. To address this problem, an adaptive neighbor mode in the improved segmentation is defined...
The ever increasing volumes of image-based spam e-mails are bringing more annoyance to Internet users, and how to filter it has become a pressing problem. This paper discussed the evaluation problem of image spam classification system using analytic hierarchy process (AHP). First propose the evaluating index system and build hierarchy structure model; Then build the comparative matrixes according...
Same layer Webpage have similar presentation styles and noise blocks. The first step of data mining is to remove noise blocks from Web pages. Different from traditional similarity measurement method based on DOM trees, a noise removal method based on image features is proposed in this paper. In this method, Web pages are processed as images. And then, all of image features can be flexibly used as...
The video sequences degraded by fog suffer from poor visibility. In this paper, we present a contrast limited adaptive histogram equalization (CLAHE)-based method to remove fog. CLAHE establishes a maximum value to clip the histogram and redistributes the clipped pixels equally to each gray level. It can limit the noise while enhancing the contrast. First, the background image is extracted from the...
Grading students' assignments of multimedia work is the key step in the "multimedia making" courses. Now most multimedia work assignments (e.g. Photoshop images, Flash animations) are just evaluated by the teachers manually. This evaluation method is not only laborious, tedious and time-consuming, but also difficult to avoid manual errors. Hence, it is necessary to automate the grading procedure...
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