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We propose and verify a method for color-based cluster segmentation of the various tissues from ectocervix. That method uses a simplified compartment-like analysis, aiming for a Gaussian Mixture Model (GMM)-tailored segmentation. The tissues of interest are the cervical canal (CC), the columnar epithelium (CE), the squamous epithelium (SE) and the transformation zone (TZ) the latter known as area...
This paper presents a segmentation method combining an active contour approach with a watershed pre-segmentation. Segmentation is performed on two modalities: one being the color of the regions, the other one being the change due to motion. On the one hand, watershed methods are very efficient to provide an oversegmentation of homogeneous color regions. On the other hand, active contours methods are...
A classic approach to obtain High Dynamic Range Images (HDRI) consists in combining multiple images of the same scene with varying exposures. However, if the scene is not static during the time of capture, moving objects will appear blurry and ghosted, i.e. in multiple locations. Detecting and removing ghosting artifacts is an important issue for automatic generation of HDRI of dynamic scenes. This...
The paper defines the conditions for the coefficients of a linear color transformation that guarantee that after one cycle of transformation and inverse transformation all further cycles of transformation do not introduce rounding errors to sample values. Moreover, the upper limits of the rounding error can be calculated according to the formulas given in the paper. The results are very important...
One step in the reconstruction pipeline for creating scene geometry from multiple camera views is the fitting of 3-D planes to image segments. We optimize the four homogeneous coefficients of the equation of a plane, so that the homography it induces on a source image segment minimizes a cost function with photo consistency and edge consistency terms. The photo consistency term for a segment is defined...
Some visual saliency models have been proposed to describe how the human visual system perceives and processes visual information. In this paper we describe four frequency domain visual saliency models based on new spectrum processing methods. The four saliency models are the Gamma Corrected Spectrum (GCS) model, the Gamma Corrected Log Spectrum (GCLS) model, the Gaussian Filtered Spectrum (GFS) model,...
In this paper, we introduce the concept of "value" to the abduction procedure. In fact, "values" are dealt with outside of the abduction procedure. For usual abduction, we always consider values included in the knowledge (hard coded). However, for a certain procedure, such values are unnecessary and sometimes harmful. Outside of the main abduction procedure, the inference system...
In this paper, we present a system for video face replacement that requires only two videos of a source actor and a target actor using only a single digital camera. Existing video face replacement techniques usually need special equipment or 3D models; the proposed system achieves a realistic replacement of faces without using 3D models or special equipment. There are many applications of the proposed...
In this paper, a new color image enhancement technique is proposed. First, input color images are converted to the HSV color space. Then, a new proposed enhancement homomorphic filtering technique is applied on the value component to improve illumination. Finally, a color restoration function is used to overcome the problems of color violation. For the purpose of evaluation, experiments are carried...
The present study is conducted in two phases. In the first phase we analyze the different aspects of gray image watermarking in a colored host. Robustness and imperceptibility are used as analysis parameters. The approaches explored and compared in this study are — watermark embedding with any one of the three RGB (Red-Green-Blue) components (single channel embedding), multichannel watermark embedding...
This paper focuses on the visual fatigue issue while viewing 3D contents. The issue is caused by the distance between the screen and the fused images. A stereo image depth optimization system with disparity map calculation, viewpoint optimization and stereo image synthesis is proposed to solve the issue with the following procedure: first, its disparity map calculation adopts the modified binary window...
In this paper a Dual Ratio change detection method is proposed. This method involves taking two ratios for both real color and false color imagery in order to maximize detected changes and minimize false alarms. The proposed Dual Ratio method outperforms other methods tested in terms of Area Under the Curve (AUC) performance by an average of 18 percent at low false alarm rates and an average of 10...
This paper introduces a novel approach for image edit. Instead of solving poisson equation, image edit task can be treated as in painting the region of interest by propagating the boundary differences between target and source image. Based on the Fast Marching Method, differences along the boundary can be progressively eliminated to interior layer by layer, and we can get a seamless edit result. It...
Because cartilage does not regenerate and cartilage loss is irreversible, it is important to detect cartilage damage in early stage, so that preventive treatment can be used to stop the progression. The parametric magnetic resonance imaging techniques including T1, T2 and T2* maps provide information about the damages to the extracellular matrix of articular cartilage and the increase of water content...
In this paper, visual attention transfer is formulated as a nonlocal diffusion equation. Different from the other diffusion based method, a nonlocal diffusion tensor is introduced to consider both the diffusion strength and direction. Along with the principle direction, the diffusion should be suppressed to preserve the dissimilarity between the foreground and background, and in other directions,...
Playing a vital role, saliency has been widely applied for various image analysis tasks, such as content-aware image retargeting, image retrieval and object detection. It is generally accepted that saliency detection can benefit from the integration of multiple visual features. However, most of the existing literatures fuse multiple features at saliency map level without considering cross-feature...
In this study, digital image processing was incorporated to eliminate the Subjectiveness of manual inspection of diseases in rice plant and accurately identify the three common diseases to Philippine's farmlands: (1) Bacterial leaf blight, (2) Brown spot, and (3) Rice blast. The image processing section was built using MATLAB functions and it comprises techniques such as image enhancement, image segmentation,...
A novel model of role of conditioning in attention is presented and evaluated on a Nao humanoid robot. The model implements conditioning and habituation in interaction with a dynamic neural field where different stimuli compete for activation. The model can be seen as a demonstration of how stimulus-selection and action-selection can be combined and illustrates how positive or negative reinforcement...
Melanin pigmentation of the skin and the underlying blood vasculature is strongly correlated as biomarkers for the progressive stages in skin cancer. With the surge in keen interest among private and public organizations for research and development of optical scanners for imaging the skin and early cancer detection, it is also crucial from the patient usage point of view to have a reliable diagnostic...
Image mosaics is recently very popular in image processing. The image saliency is used in the whole process of creating an image mosaic with variable size tiles, while a novel energy map is proposed by the improved It's saliency detection algorithm. The target image is divided into small tiles with variable sizes based on the energy map. Image retrieval is introduced to choose the tile images from...
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