distribution of retinal blood vessels (rbvs) in retinal images has an important role in the prevention, diagnosis, monitoring and treatment of diseases, such as diabetes, high blood pressure, or heart disease. therefore, detection of the exact location of rbvs is very important for ophthalmologists. one of the frequently used techniques for extraction of these vessels is region growing-based se...

background: laparoscopy or minimally invasive surgery is a surgical procedure in which laparoscope and other surgical instruments are inserted inside body via a few small incisions. laparoscope is used to look inside the patient's body and records displayed images. temporal segmentation of laparoscopic videos has many applications like detecting laparoscopic anomalies and interrupts. it is prer...

We study a variation of the 1-center problem in which, in addition to a single supply facility, 8 we are allowed to locate a highway. This highway increases the transportation speed between any demand 9 point and the facility. We show that we can find the optimal location of both the facility and the highway 10 in O(n) or O(n log n) time, depending on whether or not the highway’s length is fixe...

Introduction Congestion bottlenecks are severe traffic chokepoints where demand far exceeds available highway capacity. The Federal Highway Administration (FHWA) of the US Department of Transportation states that recurring bottlenecks account for the largest share of road delay in the United States (40%), far exceeding traffic incidents (25%), inclement weather (15%), construction (10%) or othe...

Image segmentation is one of the most common steps in digital image processing. The area many image segmentation algorithms (e.g., thresholding, edge detection, and region growing) employed for classifying a digital image into different segments. In this connection, finding a suitable algorithm for medical image segmentation is a challenging task due to mainly the noise, low contrast, and steep...

| This paper deals with a particular kinodynamic 4] trajectory planning problem that we call thèhighway problem'. It consists in planning a time-optimal trajectory for a vehicle which is travelling in a structured workspace amidst other vehicles and is subject to constraints on its velocity and acceleration. By structured workspace, we mean that there exists lanes within which the vehicles are ...