International Journal of Image Mining (4 papers in press)
Trigonometry Based Motion Blur Parameter Estimation Algorithm
by Ruchi Gajjar, Tanish Zaveri, Asim Banerjee, K. V. V. Murthy
Abstract: Restoration of blurred images requires information about the blurring function, also known as point spread function (PSF), which is generally unknown in practical applications. Identification of blur parameters is essential for yielding blurring function. This paper proposes a technique for estimation of parameters of motion blur by formulating the trigonometric relationship between the spectral lines of the motion blurred image and the blur parameters. In majority of the existing motion blur parameter estimation approaches, the length is estimated by rotating the spectrum to the estimated angle. This requires the angle estimation to be done forehand. The proposed method estimates both, length and angle simultaneously by deriving the trigonometric relation between spectral lines, thereby eliminating the need of rotating the spectrum for length estimation. The proposed technique is applied on standard database Berkeley segmentation dataset, Pascal VOC 2007 dataset and USC-SIPI Image database. The simulation results show that length and angle are accurately estimated by the proposed method. The performance of proposed method is compared with existing state of art techniques which show that proposed method exhibit better performance in terms of the test range and parameter estimation.
Keywords: image degradation; motion blur; parameter estimation; point spread function.
Special Issue on: ICIA-16 Image Processing and Analysis
Analysis of Diverse Optimisation Algorithms in Breast Cancer Detection
by Senthil Kumar K, Venkata Lakshmi K, Karthikeyan K, JasiyaJabeen A
Abstract: Breast cancer is a widespread problem faced by the women in recent years. It is highly essential to detect the breast cancer at an early stage to save lives. The ultrasound image helps more in the diagnosis and analysis of breast cancer than the mammogram. Image segmentation technique is used to segment the mistrustful masses from an ultrasound image of the breast. Optimization algorithms play a vital role in image segmentation techniques which increases the efficiency and accuracy of image segmentation results. This work focuses on implementation and analysis of various optimization algorithms in detecting mistrustful masses in the given ultrasound image of the breast. In preprocessing the speckle noise is reduced by using the median filter and Gaussian filter and proved that the median filter has better performance than the Gaussian filter in the isolation of speckle noise. The visual appearance of the input image is improved by using adaptive histogram equalization. The preprocessed input image is subject to image segmentation techniques with various optimization algorithms viz. particle swarm optimization, chaotic particle swarm optimization, k-Medoid clustering, fuzzy c Means and k-Means clustering with manual selection of cluster centers. A comparative analysis has been done on the above said algorithms using MATLAB and from the results, it is proved that the chaotic particle swarm optimization algorithm has best result among the others. The accuracy and dice similarity coefficient of the chaotic particle swarm optimisation based method is 93.5793 and 0.8735 respectively. This proves that the chaotic particle swarm optimization algorithm is highly suitable in segmenting the breast ultrasound image.
Keywords: Ultrasound image; Median filter; Gaussian filter; Histogram Equalisation; Particle swarm optimization; Chaotic particle swarm optimization; k-Medoids; Fuzzy c-Means; k-Means clustering and Dice coefficient.
Generating Efficient Classifiers Using Facial Components for Age Classification
by Sreejit Panicker, Smita Selot, Manisha Sharma
Abstract: Aging a natural phenomenon, happens with time and becomes evident as person grows. An individual undergo various changes as age progresses. This is noticeable by his or her facial structure and texture which changes as growth accelerate. Facial growing is a standard happening that is sure, and differs from individual to individual subject on the conditions and living susceptibility. Uses of age assertion are seen in areas like Forensic science, security, and furthermore to decide wellbeing of an individual. Facial parameters used for age characterization can be either structural or textural. In this paper we have used statistical methodologies for feature extraction. In structural, facial development is considered for characterization, by figuring the Euclidean separation between the different points of interest on facial image. The experimental results are significant and remarkable.
Keywords: Aging; Age Estimation; Facial Images.
Object Boundary Detection through Robust Active Contour Based Method with Global Information
by Ramgopal Kashyap
Abstract: Restorative applications have turned into a help to the healthcare industry various therapeutic applications require legitimate segmentation of medical images for an exact determination. These applications guarantee astounding segmentation of therapeutic images utilizing the level set method is a popular method, yet quick handling with exact portions remains a test. The result of the poor radio recurrence loop consistency and inclination driven swirl streams, there is much clamor and intensity inhomogeneity in CT images, and it seriously influences the segmentation exactness, better segmentation results are hard to accomplish with conventional methods. In the proposed method initially composed energy utilization, enhanced cross section Boltzmann method which replaces the partial differential equation settling approach that sets aside such a great amount of time for preparing. An enhanced energy based active contour method with a level set definition which coordinates with local and global energy terms, local term compels to pull the form and limit it to object boundary, determines significant advantages not restricted to, quick preparing, mechanization, invariance of precise CT image portions,. Thus, the global energy fitting term drives the development of form at a separation of the object boundary. The global energy term depends on the global segmentation calculation, which can better catch force data of images than hybrid region based active contour method. Both local and global terms, are commonly acclimatized to build a level set method to portion images with accuracy. The oddity inside our technique is to quickly understand fractional differential conditions in the level set strategy with Boltzmann strategy which utilizes neighborhood mean a quality which empowers it to identify limits. The proposed strategy infers profitable points of interest not stuck simply utilizing speedy process, computerization and right restorative picture portions. The proposed method performs better both subjectively and quantitatively contrasted with other energy based method.
Keywords: Active Contour Models; Hybrid Region Based Method; Intensity Inhomogeneity; Local Binary Fitting; Local Image Fitting; Mumford Shah Model; Signed Distance Function; Variational Level Set Model.