In this paper, we study the Hough transform theory images by generating the peak point from gray scale images, and seek for the effect caused by the distance and the angles. Lines will appear on the edge of images, which has been processed edge detection theorem. The input to a Hough transform is normally an image that has been edge detected with a Robert, Sobel or Canny edge detector, for inst...

one of the locations of renal artery atherosclerosis is at the orifice of the renal artery, therefore thestructure of this orifice was assessed in 6 normal, adult male dogs by light microscopy (lm) andtransmission electron microscopy (tem). for the lm study, processed tissues were embedded in paraffinand sectioned serially into 6-μm thickness. sections were stained with orcein. for the tem stud...

The problem of detecting all possible digital line components contained in a given binary edge image is one of the most fundamental problems in pattern recognition and a great number of algorithms have been proposed under the name of Hough Transform [3, 4]. Most of them are based on the voting technique on a subdivided parameter space. Our basic idea is as follows: When we parameterize a line p...

In many cases, a set of obstacles, such as bridge piers and abutments, are located in the river waterway. Bridge piers disrupt river’s normal flow, and the created turbulence and disturbance causes diversion of flow lines and creates rotational flow. Geometric shape and position of the piers with respect to flow direction and also number of piers and their spacing are effective on changing the ...

This paper describes a new, high-speed contourf i l l method for alpha-numeric and Japanese Kanji characters developed to generate digital bitmap image (binary image) patterns from contour lines. The contour lines are expressed by Freeman's chain code. We call this method the Improved Edge-flag method. The speed of this method is increased by using an edge-flag list which stores the coordinates...

This paper presents a low-cost Ultra Wideband (UWB) pulse generator that can vary the pulse duration digitally by using a Step Recovery Diode (SRD), microstrip transmission lines and PIN diodes. First, a sharp edge is generated by using a SRD circuitry. Then a pulse is formed from the sharp edge through the use of transmission lines and the PIN diodes. Based on the number of transmission lines ...

We measure the sharpness of natural (complex) images using Gaussian models. We first locate lines and edges in the image. We apply Gaussian derivatives at different scales to the lines and edges. This yields a response function, to which we can fit the response function of model lines and edges. We can thus estimate the width and amplitude of the line or edge. As measure of the sharpness we pro...

We present the results of a 21 cm neutral hydrogen (H i) line detection experiment in the direction of 18 low luminosity dwarf galaxies of the Centaurus A group, using the Australia Telescope National Facility 64m Parkes Radio Telescope and the Australia Telescope Compact Array. Five dwarfs have H i masses between MHI = 4 × 10 5 to MHI = 2.1 × 10 7 M⊙ and 0.04 < MHI/LB < 1.81 M⊙L −1 ⊙,B. The ot...