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Aims
Evaluating expression of the human epidermal growth factor receptor 2 (HER2) by visual examination of immunohistochemistry (IHC) on invasive breast cancer (BCa) is a key part of the diagnostic assessment of BCa due to its recognized importance as a predictive and prognostic marker in clinical practice. However, visual scoring of HER2 is subjective, and consequently prone to interobserver variability...
Speckle noise is the primary cause of degradation of quality, resolution and contrast in ultrasound (US) images. Speckle in ultrasound B-mode images is caused by additive and destructive interference of ultrasound signals received from scatterers. Methods for analysing and reducing noise in US images require accurate models of image formation that can generate ground truth data. Such synthetic images...
Several methods for capturing motion data from single video have been reported in computer vision literature, and most of them deal with stationary background. The problem becomes more complex and challenging in a moving scene where traditional background subtraction algorithms often fail. We require robust algorithms for marker-less tracking of human body's movements and for extracting motion information...
High Resolution Computed Tomography (HRCT) images of the lungs contain a huge amount of geometrical information that could be effectively extracted to construct a mesh surface of the underlying geometry to a high level of detail. In this paper, we consider this as a problem of constructing 3D surfaces from contours of axial slices. While many reconstruction algorithms adopt volumetric approaches and...
Schlick’s approximation of the term xp is used primarily to reduce the complexity of specular lighting calculations in graphics applications. Since moment functions have a kernel defined using a monomial xpyp, the same approximation could be effectively used in the computation of...
This paper presents a novel method for sketch based rendering of three-dimensional models using a single texture containing multiple levels of stroke distributions. The proposed method eliminates the need for loading several mipmapped sequences of images in a tonal art map. Instead, stroke textures are embedded into different levels of the intensity range to create a single texture. Appropriate values...
The effectiveness of local or global features has recently attracted growing attention in the field of texture image classification and retrieval. The features of the local binary pattern (LBP) for instance, usually lack global spatial information while global descriptors would provide very little local information. This paper proposes two different descriptors to circumvent these shortcomings by...
In this paper we propose an approach compliant with the MPEG-4 standard to synthesize and control facial expressions generated using 3D facial models. This is achieved by establishing the MPEG-4 facial animation standard conformity with the quadratic deformation model representations of facial expressions. This conformity allows us to utilize the MPEG-4 facial animation parameters (FAPs) with the...
We present a novel approach for generating stylized artistic rendering of caricatures from a given face image, with the ability to map any one of the main six expressions and control the degree of its expressiveness on the generated caricature. Our method achieves this by manipulating the facial appearance and expressivity of the caricature, using quadratic deformation model representations of facial...
Orthogonal moment functions have long been used in image analysis. This paper proposes a novel approach based on discrete orthogonal Tchebichef Moment for efficient image compression. The method incorporates simplified mathematical framework techniques using matrices, as well as a block-wise reconstruction technique to eliminate possible occurrences of numerical instabilities at higher moment orders...
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