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Based on remote sensing (RS), the updating method of land-use map is becoming one of the most important study direction in land use and cover change (LUCC) field over the world. This study have broken through traditional land use change detection methods based on two remote sensing images and matched the old land use vector data to the remote sensing image of new period, where making use of the vector...
Clustering analysis is the problem of partitioning a set of objects O = {o1... on} into c self-similar subsets based on available data. In general, clustering of unlabeled data possess three major problems: 1) assessing cluster tendency, i.e., how many clusters to seek? 2) Partitioning the data into c meaningful groups, and 3) validating the c clusters that are discovered. We address the first problem,...
Fingerprint orientation estimation is an important step in fingerprint pre-processing. Here we propose a new algorithm for fingerprint orientation estimation, which is based on gradient direction calculation and determining the orientation by considering the orientation of neighboring regions. This algorithm is mathematically simple and fast for real-time application. This algorithm shows performance...
This research proposes new system which finds the music by using Query-by-humming (QBH). For finding a stored music, the features of humming data are selected by using G.729 feature extractor. We normalize the extracted features by using mean-shifting, median filtering, average filtering and min-max scaling methods. Then the corresponding music is matched based on dynamic time warping (DTW) algorithm...
The key of intelligent infusion system is to detect liquid level of infusion bottle fast and accurately. We proposed an automatic detection algorithm of liquid level of infusion bottle based on image processing, by designing edge detection, binarization, filtering, image projection and motion detection to realize automatic liquid level detection. The algorithm has the advantages of stable noise-resistance,...
3D reconstruction based on high-level features, such as line and plane, is an important development trend in Digital Photogrammetry and Computer Vision. A novel method for extracting stratight line is presented, which can be illustrated as follows. Firstly, image is preprocessed by Wallis filtering that is used to enhance the image contrast and reduce the noise, so it is easy to extract more lines...
In this paper, we propose a new algorithm based on SIFT, combining several feature matching methods to achieve high accuracy of fabric image mosaic. After multiple matching and filtering steps, the overlap parts between the images can be found accurately. Experimental results show that the proposed algorithm is feasible with promising effect for fabric images mosaic.
Due to the existence of complicated illumination, background and variations of pose, fast and robust face detection is constrained in many applications. This paper describes a novel scheme conceived to integrate multiple cues to detect face under in-plane rotation, Concretely, we apply skin-color, heuristic rules and eye feature to build a robust detector. First, skin detection approach based on novel...
This paper studies median filtering algorithm and several related fast algorithm proposed by other professors, then gives a novel fast algorithm of median filtering based on divide-and-conquer method and improved-choose-sort method. In new algorithm, all the pixels in filtering window are divided into several blocks, the median values of each block are computed using improved-choose-sort algorithm,...
In this paper, a method of detecting industrial bearing's quality based on image edge morphologic analysis and recognition technology was proposed. The image filter, enhancement and segmentation were adopted to pre-process the image and a novel image coding method based on relative direction coding was presented as well. Furthermore, an improved method based on image edge morphologic analysis was...
The biometrics identification technology based on vein pattern has being developed rapidly in recent years. However, the vein image acquired by near-infrared (NIR) imaging device has low contrast and usually has a mount of noise which make an effective image segmentation be a great challenge. Thresholding is a popular vein image segmentation method, which is easy to calculate and can shorten the recognition...
This paper describes an automated technique to extract defects in photomask images. Conventional approaches to photomask inspection rely on difference based techniques which are susceptible to distortion from image `noise'. We propose a robust method based on high order moment (HOM) between reference and test images. In comparison to difference based methods, HOM reveals a wide distribution range...
Space- and time-referenced data published on the Web by general people can be viewed in a dual way: as independent spatio-temporal events and as trajectories of people in the geographical space. These two views suppose different approaches to the analysis, which can yield different kinds of valuable knowledge about places and about people. We define possible types of analysis tasks related to the...
This paper presents a fast algorithm to detect the road lines and the road edges of structured and unstructured roads, respectively. In structured road detection, we firstly utilize vertical Sobel mask and color characteristic to detect the points of road lines. If the number of points is greater than a predefined threshold, we refine the detection results with slope filtering. And the least square...
This paper proposes a novel region based image fusion scheme based on high boost filtering concept using discrete wavelet transform. In the recent literature, region based image fusion methods show better performance than pixel based image fusion method. Proposed method is a novel idea which uses high boost filtering concept to get an accurate segmentation using discrete wavelet transform. This concept...
This paper specifies an OCR system for printed Malayalam characters. Malayalam is the principal language of the South Indian state Kerala. The input to the system would be the scanned image of a page of text and the output is a machine editable file. Malayalam Character recognition is a complex task because of the presence of two scripts; old script and new script and a lot of combinational characters...
According to the deficiency of the traditional detecting method, this paper develops a set of intelligent automatically detecting system for the internal bore surface quality, which combined the image processing technology and pattern recognizing technology. The radius of image is detected using Least-squares fitting circle theory and circular degree is obtained through calculating circular surface...
In the detection of change objects of SAR images, regard to the images containing high intensity noise, traditional methods will produce a considerable false alarm. This paper presents a new method of change detection based on directional information. Direction measure is proposed to suppress noises and brighten object contours. Then region blocks which contain changing objects are extracted according...
With the development of information technology, the number of scanned images is increasing rapidly. There are many important texts in these images. In order to satisfy the need of images viewing, text identification and text retrieval, this paper presents an efficient method for text segmentation. Firstly, localizes the text blocks in scanned image. Secondly, according to its gray/color distribution,...
A method for removing line scratches in old movie films is proposed. This method corresponds to an adaptive median filter with a variant window. Since the film scratches appear as sharp thin lines on video images, they can be removed by median filtering. However, some fine structures of the image, especially line elements, are deformed by the median filtering. Thus, a new type of signal interpolation...
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