{"title":"Determination of the essential matrix using discrete and differential matching constraints","authors":"Adel H. Fakih, J. Zelek","doi":"10.1109/CIIP.2009.4937889","DOIUrl":"https://doi.org/10.1109/CIIP.2009.4937889","url":null,"abstract":"We present a method to determine the essential matrix using both discrete and differential matching constraints. Differential constraints, derived from optical flow, are abundant in contrast to the discrete constraints, derived from feature correspondences, which are scarce when just a limited number of salient features are available. We formulate a likelihood of the camera motion given the correspondences of a set of features and the image velocities of these features. We show how this likelihood can be used to determine the essential matrix both in a robust hypothesize-and-test framework, and then in non-linear iterative refinement. Our results show that the use of the extra optical flow constraints gives better estimates of the essential matrix, when compared to using the discrete data alone.","PeriodicalId":349149,"journal":{"name":"2009 IEEE Symposium on Computational Intelligence for Image Processing","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125915389","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"OWA filters: A robust filtering method and its application to color images","authors":"Aryabrata Basu, M. Nachtegael","doi":"10.1109/CIIP.2009.4937873","DOIUrl":"https://doi.org/10.1109/CIIP.2009.4937873","url":null,"abstract":"Bilateral filtering provides a scheme for non-iterative edge-preserving smoothing, but the results could be strongly affected by the presence of outliers. In this paper we develop a robust bilateral filter for color images, and in order to achieve this we propose to improve the bilateral filtering technique [13] by using Ordered Weighted Averaging operators. We adopt a fuzzy logic based approach: if the filtering is considered as a weighted averaging, then each filter is associated with a fuzzy set and the membership values of these fuzzy sets represent the weights. In this context, the bilateral filter is a conjunction of two fuzzy sets in the case of grayscale images: one in the spatial domain and one in a photometric domain. Applied to color images, we propose to extend the conjunction to three fuzzy sets: one in the spatial domain, one in the brightness domain and one in the chromatic domain. Taking into account the robustness of rank filters, we propose to define an OWA filter in order to obtain robust adaptive filters in brightness and chromaticity. The robustness and performance of the filter is illustrated with several experiments, revealing its ability to remove different types of noise in the presence of outliers, while preserving edges. The noise types considered are impulse noise and a combination of Gaussian noise with “salt and pepper” noise types.","PeriodicalId":349149,"journal":{"name":"2009 IEEE Symposium on Computational Intelligence for Image Processing","volume":"88 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126199661","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Metric planar rectification from perspective view via circles","authors":"Yisong Chen, Peng Lu, WenHang Li, ShaoRong Wang","doi":"10.1109/CIIP.2009.4937883","DOIUrl":"https://doi.org/10.1109/CIIP.2009.4937883","url":null,"abstract":"In this paper, we show that the images of the circular points can be identified by solving the intersection of two imaged coplanar circles under projective transformation and thus metric planar rectification can be achieved. The advantage of this approach is that it eliminates the troublesome camera calibration or vanishing line identification step that underlies many previous approaches and makes the computation more direct and efficient. Vanishing line identification becomes a by-product of our method. Different root configurations are inspected to estimate the image of the circular points reliably so that 2D Euclidean measurement can be directly made in the perspective view. The experimental results validate the effectiveness and accuracy of the method.","PeriodicalId":349149,"journal":{"name":"2009 IEEE Symposium on Computational Intelligence for Image Processing","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116850745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A new approach to image sparse decomposition based on MP","authors":"Yingyun Yang, Dongxin Shi, Ke Sun, Qin Zhang","doi":"10.1109/CIIP.2009.4937882","DOIUrl":"https://doi.org/10.1109/CIIP.2009.4937882","url":null,"abstract":"One of main problems in image sparse decomposition is the contradiction between the quality of the image and the algorithm's speed. To overcome this key problem, a new fast algorithm is presented. At first the number of atoms is decreased by making use of the atom energy property; then this algorithm converts very time-consuming inner product calculations in sparse decomposition into correlations that are fast done by FFT. Experimental results show that the performance of the proposed algorithm is effective.","PeriodicalId":349149,"journal":{"name":"2009 IEEE Symposium on Computational Intelligence for Image Processing","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128424673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"2D ultrasound image segmentation using graph cuts and local image features","authors":"M. Zouqi, J. Samarabandu","doi":"10.1109/CIIP.2009.4937877","DOIUrl":"https://doi.org/10.1109/CIIP.2009.4937877","url":null,"abstract":"Ultrasound imaging is a popular imaging modality due to a number of favorable properties of this modality. However, the poor quality of ultrasound images makes them a bad choice for segmentation algorithms. In this paper, we present a semi-automatic algorithm for organ segmentation in ultrasound images, by posing it as an energy minimization problem via appropriate definition of energy terms. We use graph-cuts as our optimization algorithm and employ a fuzzy inference system (FIS) to further refine the optimization process. This refinement is achieved by using the FIS to incorporate domain knowledge in order to provide additional constraints. We show that by integrating domain knowledge via FIS, the accuracy is improved significantly so that further manual refinement of object boundary is often unnecessary. Our algorithm was applied to detect prostate and carotid artery boundaries in clinical ultrasound images and shows the success of the proposed approach.","PeriodicalId":349149,"journal":{"name":"2009 IEEE Symposium on Computational Intelligence for Image Processing","volume":"95 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116276795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"An efficient architecture for hardware implementations of image processing algorithms","authors":"F. Khalvati, H. Tizhoosh","doi":"10.1109/CIIP.2009.4937875","DOIUrl":"https://doi.org/10.1109/CIIP.2009.4937875","url":null,"abstract":"This work presents a new performance improvement technique for hardware implementations of non-recursive convolution based image processing algorithms. It combines an advanced data flow technique (instruction reuse) proposed in modern microprocessor design with the value locality of image data to develop a method, window memoization, that increases the throughput with minimal cost in area and accuracy. We implement window memoization as a 2-wide superscalar pipeline such that it consumes significantly less area than conventional 2-wide superscalar pipelines. As a case study, we have applied window memoization to Kirsch edge detector. The average speedup factor was 1.76 with only 25% extra hardware.","PeriodicalId":349149,"journal":{"name":"2009 IEEE Symposium on Computational Intelligence for Image Processing","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125951657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A modified fuzzy c-means algorithm with adaptive spatial information for color image segmentation","authors":"Zhiding Yu, R. Zou, Simin Yu","doi":"10.1109/CIIP.2009.4937879","DOIUrl":"https://doi.org/10.1109/CIIP.2009.4937879","url":null,"abstract":"Though FCM has long been widely used in image segmentation, it yet faces several challenges. Traditional FCM needs a laborious process to decide cluster center number by repetitive tests. Moreover, random initialization of cluster centers can let the algorithm easily fall onto local minimum, causing the segmentation results to be suboptimal. Traditional FCM is also sensitive to noise due to the reason that the pixel partitioning process goes completely in the feature space, ignoring some necessary spatial information. In this paper we introduce a modified FCM algorithm for color image segmentation. The proposed algorithm adopts an adaptive and robust initialization method which automatically decides initial cluster center values and center number according to the input image. In addition, by deciding the window size of pixel neighbor and the weights of neighbor memberships according to local color variance, the proposed approach adaptively incorporates spatial information to the clustering process and increases the algorithm robustness to noise pixels and drastic color variance. Experimental results have shown the superiority of modified FCM over traditional FCM algorithm.","PeriodicalId":349149,"journal":{"name":"2009 IEEE Symposium on Computational Intelligence for Image Processing","volume":"63 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124799303","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Compressed sensing for face recognition","authors":"N. Vo, D. Vo, S. Challa, W. Moran","doi":"10.1109/CIIP.2009.4937888","DOIUrl":"https://doi.org/10.1109/CIIP.2009.4937888","url":null,"abstract":"In this paper, we present a new approach to build a more robust and efficient face recognition system. The idea is to fit the face recognition task into the new mathematical theory and algorithm of compressed sensing framework. With its beautiful theoretical results from compressed sensing, the new face recognition framework stably gives a better performance with some advantages compared to traditional approaches. Experimental results show the promising aspects of new approach when comparing with the most popular subspace analysis approaches in face recognition such as Eigenfaces, Fisherfaces, and Laplacianfaces in terms of recognition accuracy, efficiency, and numerical stability.","PeriodicalId":349149,"journal":{"name":"2009 IEEE Symposium on Computational Intelligence for Image Processing","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134033934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"3-D reconstruction and automatic fusion of edge maps from different modalities of an object","authors":"U. C. Pati, Aditya Modi, P. Dutta, A. Barua","doi":"10.1109/CIIP.2009.4937880","DOIUrl":"https://doi.org/10.1109/CIIP.2009.4937880","url":null,"abstract":"The paper presents reconstruction of a 3-D model as well as automatic fusion of edge maps extracted from the 3-D model and intensity image of an object. A data acquisition system has been developed with a laser source and camera. The 3-D model of the object is reconstructed by registration and integration of a set of range images obtained from scanning the object by laser beam. The intensity image of the object is captured under illumination light. Edge maps in both the cases are extracted by appropriate techniques. The corner points of various shapes in both the edge maps are obtained by implementing a technique using shape signatures. 3-D edge points are mapped to 2-D plane with the help of perspective transformation. A novel algorithm has been proposed for the establishment of automatic correspondence between the corner points in both the edge maps. The method for automatic fusion of edge maps using affine transformation followed by iterative closest point algorithm has been introduced. Range and intensity images are complementary in nature and provide a richness of description which is not possible with either source in isolation.","PeriodicalId":349149,"journal":{"name":"2009 IEEE Symposium on Computational Intelligence for Image Processing","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134363529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Adaptive λ-enhancement: Type I versus type II fuzzy implementation","authors":"H. Tizhoosh","doi":"10.1109/CIIP.2009.4937872","DOIUrl":"https://doi.org/10.1109/CIIP.2009.4937872","url":null,"abstract":"λ-enhancement, introduced by Tizhoosh et al., is a contrast adjustment technique that uses involutive fuzzy complements to find the best gray-level transformation in order to increase the image contrast. Applied on medical images, λ-enhancement can provide good results with respect to visually perceived improvement of object-background discrimination. In this work, we provide two extensions of λ-enhancement. First we extend it to employ interval-valued fuzzy sets (special case of type II fuzzy sets), and second, we provide an adaptive version of both regular (type I) and interval-value (type II) fuzzy λ-enhancement. Using breast ultrasound images, we demonstrate the enhancement effect and compare them with the well-established CLAHE method (contrast-limited adaptive histogram equalization).","PeriodicalId":349149,"journal":{"name":"2009 IEEE Symposium on Computational Intelligence for Image Processing","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128101455","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}