Acoustic images of the carotid artery

__Abstract__ Arteries are strong and flexible structures that supply oxygenated blood to the organs. Their strength and flexibility rely on three distinctive layers, called the adventitia, media and intima. These layers of the arterial wall are rich in elastin, collagen and smooth muscle cells, which give the arteries complex elastic properties, allowing them to sustain and facilitate rapid and large variations in blood pressure

Grating cell operator features for oriented texture segmentation

The performance of two well-known texture operators (based on Gabor-energy and the cooccurrence matrix) is compared with the performance of a new, biologically motivated texture operator the grating cell operator; which was proposed elsewhere by the authors. The comparison is made using a new quantitative method, based on the Fisher criterion. Together with some classification results comparison experiments the comparison shows a clear superiority of the new operator in oriented texture problems.</p