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The following topics are dealt with: image processing; computer vision; biometrics; biomedical signal processing; data mining; information retrieval; information coding; pattern recognition; document processing; and information system security.
In this paper, we explored the use of certain image features, block-wise histograms of local orientations. They are used in many current object recognition algorithms, for the task of locating cephalometric landmarks on X-ray images. After reviewing existing cephalometric landmark detection systems, we show experimentally that grids of Histograms of Oriented Gradients (HOG) descriptors significantly...
In this paper, a computer approach is proposed for recognition of retina layers on optical coherence tomography (OCT) images. OCT uses the optical backscattering of light to scan the eye and describe a pixel representation of the anatomic layers within the retina. Our approach is based on co-occurrence matrix for feature extraction and a neural network for classifying, which four features of this...
One of the important stages for optical character recognition system is text components segmentation from non-text components of input images. In this paper a machine learning technique based on a naive bayes classifier is developed for text components segmentation. In training stage, a simple procedure is used to generate a large collection of training data sets for learning the classifier. A collection...
Character segmentation and recognition are imperative steps in the vehicle license plate recognition (VLPR) system. The skewed license plate affects badly on the accurate character segmentation and recognition. To solve the problem, an efficient approach for skew correction of license plate is proposed based on wavelet transform and principal component analysis. First, a skew feature image of the...
Watermarking is the embedding of data into images such that it may or may not visible in the images. It's essential in today's world for copyright protection and identifying the rightful owner of the image in today's world of internet. Generally, watermarking involves two stages namely embedding of watermark and extraction of watermark. There are various attacks which considerably degrade the quality...
Shot boundary detection algorithm has the longest and richest history in the area of content based video analysis and retrieval. Various automatic shot boundary detection techniques have been proposed and their performances are reliable, especially for video cut detection. This paper approaches the video cut transition detection based on the block wise histogram differences of the two consecutive...
Color Images captured under complex lighting conditions may suppress the visual cue information. In order to perform consistent analysis from the images they need to be enhanced in terms of brightness along with colors restored with minimal computational overhead. Transform domain image enhancement offers a superior visual brilliance. This paper presents Hirschman Optimal Transform (HOT) based enhancement...
In this paper, a reconfigurable hand Gesture Recognition System (GRS) has been designed and developed for multiple applications using vision based techniques. Image is acquired from the camera and processed using a DSP processor in real time. Processing involves image segmentation and palm extraction techniques for extracting palm shaped objects from the background image and gesture recognition technique...
Detection and classification of vehicles is very essential for the purpose of traffic control and management. We propose efficient algorithm based on image processing using top view of vehicles according to their size. The algorithm is based on different techniques including image differencing, thresholding, edge detection and binary morphological process. Our work is simulated with the help of very...
This paper proposes an automatic vehicles counting, classification and tracking for identifying Traffic flows in an intersection which is a fundamental task for video surveillance in urban traffic management. In intelligent transportation systems (ITS), especially in field of urban traffic management, intersections monitoring is one of the critical and challenging tasks. Where, objects have different...
The growth and development of interdisciplinary research areas in the recent years has motivated the researchers in the area of image processing to apply the techniques from the Physics and Mathematics extensively in developing efficient image processing algorithms. One such application is use of topological derivatives for image segmentation. In this paper the cancer tumors from endoscopic images...
This paper presents the DCT implementation of JPEG images using discrete cosine transform (DCT). The proposed method aims at reducing the power consumption which by application of vector scaling on DCT. This will be very useful for image compression and transmission applications. Using the character of energy distribution of DCT matrix after 2D-DCT operation, the best DCT basis functions are selected...
The contrast in real world scenes is often beyond what consumer cameras can capture. For these situations, High Dynamic Range (HDR) images can be generated by taking multiple exposures of the same scene. When fusing information from different images, however, the slightest change in the scene can generate artifacts which dramatically limit the potential of this solution. We present a technique capable...
There is various forgeries possible on digital images such as image tampering, copy-move forgery and image compositing. Out of these, copy-move forgery is a type of image forgery, in which a part of original digital image is copied and pasted to another part in the same original image to make it, forged one. This paper describes blind image forensics approach for detecting copy-move forgery. In this...
CMOS Active Pixel Sensor (APS) are widely prevalent in applications ranging from cell-phone cameras to endoscopes. In this paper, a low-power high performance CMOS APS interface is designed and implemented. This interface helps in easy acquisition of images from OV6620, a CMOS APS, using an ARM7 based 16-bit/32-bit microcontroller LPC2148. The microcontroller first initializes the APS and then proceeds...
The main objective of this paper is to develop multiple human object tracking approach based on motion estimation and detection, background subtraction, shadow removal and occlusion detection. A reference frame is initially used and considered as background information. While a new object enters into the frame, the foreground information and background information are identified using the reference...
In this paper, we propose a contact free system for palm image recognition. Palm images in Red, Green and Blue spectra are used. The method involves multispectral image acquisition using a dedicated setup, pre processing to dynamically locate the region of interest and image fusion using Fourier and wavelet transform based techniques. In pre processing movement of palm in one plane is taken care of...
Echocardiography with delineated ventricle borders is a principal technique for quantitative assessment of cardiac function. As it is, most of the prevailing segmentation methods suffer in detecting edges at equivocal regions. This paper presents an effective method for tracking Left Ventricle borders with a lower time complexity. We propose an improved fast watershed algorithm (IFWSA), which scans...
Modern night-vision systems like image intensifiers and thermal cameras enable operations at night and in adverse weather conditions. Modern night vision camera provides false-colored fused image as an output which is unnatural in appearance and it is therefore hard to interpret. In this paper, a region-based natural color mapping method for night vision imagery is presented. The proposed method colorizes...
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