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In this paper we developed an intelligent method for the selection of statistical, textural and fractal features that characterize different regions of interest in eye-fundus images. Because the regions like optic disc, macula, exudates and hemorrhages are difficult to detect, an intelligent scheme for feature detection and classification is necessary. The method is based on a voting scheme that takes...
This paper presents algorithm for character extraction of paper printed characters using MATLAB computation software with image processing toolbox. The printed paper is digitized using digital camera. Inconsistent lighting conditions while digitizing the paper severely affects the result. The main focus of this paper is to extract the characters in various illumination conditions. The planned method...
This article describes the vertical traffic signs recognition (VTSR) system. In this system the Cambridge optical correlator is used as an image comparator in the recognition stage. In our case, the Cambridge optical correlator compares detected traffic signs with reference traffic signs. One step of the VTSR system is the traffic signs detection process. Traffic signs detection is used to locate...
One of the primary cause of blindness is Glaucoma. Although the disease is incurable but its symptoms can be minimized therefore early detection of the disease is essential. Elevated intraocular pressure, gradual vision loss which is a step towards blindness, structural damage to the retina are the marked symptoms of Glaucoma. Manually. It is diagnosed by examination of size, structure, shape of optic...
Diabetic Retinopathy is a progressive eye diseases that causes changes in the blood vessels of the retina which may cause blindness if not prevented and treated at early stage. Diabetic retinopathy is one of the complications caused by diabetes and it appears in the retina, which is the tissue responsible for the vision in the eye. The early detection and diagnosis is essential to save the vision...
Spectrometers measure optical power as a function of wavelength. Optical spectrum analysis is very important part of optical spectroscopy applications. The work documented in this paper gives a working knowledge of converting spectrographs to spectrograms using color space transformation techniques. In this work it is demonstrated that how a webcam spectrometer can be used to measure spectral composition...
Diabetic macular edema (DME) is an eye disease that belongs to diabetic retinopathy which directs to vision loss. DME, which is a contusion in the macular region of eye is a common vision problem seen in diabetic patients. Hard exudates (bright lesions)in the fundus image indicates the presence of DME. Early detection of Macular Edema in diabetic patients prevents blindness. DME occurs when fluid...
Spectrometers measure optical power as a function of wavelength. Optical spectrum analysis is very important part of optical spectroscopy applications. A low cost DIY spectrometer can be created using DVD-R as diffraction grating and camera as the sensor. Pre-calibration of the DIY spectrometer using a mercury vapor based reference light source is essential. The work discussed in this paper is a proposed...
The demand for people tracking in dense crowds is increasing, but it is a challenging problem in the computer vision field. "Crowd tracking" is extremely difficult because of hard occlusions, various motions and posture changes. In particular, we need to handle occlusions for more robust tracking. This paper discusses robust crowd tracking based on a combination of supervoxels and optical...
In image compression, codecs that rely on interpolation with partial differential equations (PDEs) are becoming increasingly popular. However, there have not been many attempts to transfer this concept to video compression. Since real-time performance is challenging for PDE-based reconstruction, first efficient approaches work on a frame-by-frame basis and focus on parallel implementations without...
We analyze gestures for the initialization of HCI system, such as ‘hand-shaking’ and ‘hand-pushing’, especially in the aspects of robustness and sensing methods. For the detection of derived ‘hand-pushing’ action, temporal variation of depth histogram is used. The proposed method is empirically verified.
The coded aperture snapshot spectral imager (CASSI) system has been demonstrated to produce spectral images using just a single snapshot taken by a monochrome image sensor. In this paper, we introduce the use of color image sensors in CASSI to include the spectral sensitivity of the image sensor pixels to account for color and then investigate the impact on image quality. We analyze the use of the...
A major cause of blindness is diabetic retinopathy, which is found in the people who suffer from diabetes, which can be detected through a screening process. Hard exudates are one of the signs of diabetic retinopathy, which caused due to breakdown of retinal blood vessels. This paper presents a method for classification of hard exudates using 6-Dimensional intensity based features. The exudates and...
Detecting saliency objects in video is a challenging problem. Conventional saliency detection methods for still images do not take consideration of the motion information, which may fail to detect the moving objects in videos. In this paper, we propose a novel method for detecting saliency objects in videos. Motion cues, which are extracted from both image orientations and video orientations, are...
The development of a solar plant is an investment that requires the allocation of a large land area, where a huge number of panels are installed. Each panel has manufacturer features written usually in the back. This data with corresponding panel photo are interesting to save in order to ensure an efficient monitoring. The task of identifying panels with related features seems arduous and requires...
With the development of construction techniques, the high-rise buildings have been established and populated. In the event of fire in these buildings, as the fire is spreading, the risk of large fire is increased and the resulting casualties and property damages are increased. Therefore, the techniques to detect the flame at an early stage are necessary in order to prevent the fire and minimize the...
Glaucoma is a non-curable optic disease which can cause irreversible blindness if not detected at early stage. Progression of glaucoma occurs due to an increase in intraocular pressure and results in the damage of optic nerve. Progression of glaucoma can be stopped if detected at an early stage. There are no early symptoms of glaucoma and the only source to detect glaucoma at an early stage is the...
This paper proposes a method to detect optic disk (OD) automatically in fundus image of retina without using background mask and blood vessels. Based on the properties of OD, an idea of curve operator is presented here. This method has been implemented on three public databases and the promising results are obtained. The experimental results indicate that this proposed method of automatic OD detection...
Compressive spectral imaging has demonstrated to be a reliable way to capture multispectral data using far few measurements than traditional scanning techniques. These systems capture coded and multiplexed projections of the underlying scene, and then exploits the theory of compressive sensing to solve an optimization algorithm which attains an estimation of the 3D spatio-spectral data cube. Up to...
Moving object detection under a dynamic background has been a serious challenge in real-time computer vision applications. Global motion compensation approaches, a popular existing technique, aims at compensating the moving background for moving target segmentation. However, it suffers from inaccurate global motion parameters estimation. The paper presents a moving object detection technique that...
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