Abstract A method based on the contour coefficient and image processing technology is proposed to better identify visual elements. This article takes of as recognition feature, summarizes methods target feature extraction, shape representation, similarity studies edge preserving denoising, simplification description methods, matching methods. problem can usually be solved by filling out a form....

In Beijing, some crop field is similar to urbanized area in spectral space of ETM+ image, and this is an obstacle to extract urbanized area of Beijing from ETM+ image. Furthermore, classical texture such as variance can not improve the seperability of such two landcovers. This article proposed a skewness based framework to extract the profile of urbanized area, while skewness was seldom applied...

Retinal images are frequently corrupted by unwanted variations in intensity that occur due to general imperfections in the image acquisition process. This inhomogeneous illumination across the retina can limit the useful information accessible within the acquired image. Specifically, this can lead to serious difficulties when performing image processing tasks requiring quantitative analysis of ...

Introduction: Potential clinical benefits of high-resolution imaging using intravascular probes is often limited due to the image intensity distortion caused by the signal inhomogeneity associated with the placement of the probe. Methods developed for the phased-array and other surface coils are not as successful for intravascular imaging since the conducting structures of the RF-receiving devi...

A well-established, non-invasive, in-line technique for monitoring the rheological properties of a fluid in a pipe in real time is Pulsed Ultrasound Velocimetry (PUV) in combination with pressure difference measurement (PD). PUV makes it possible to determine the velocity profile along the measuring axis using Doppler echography. One problem that is left to solve is to develop an automatic dete...