Engineering Commons^™

Hierarchical Image Segmentation Using The Watershed Algorithim With A Streaming Implementation, Annapoorani Gothandaraman

Masters Theses

We have implemented a graphical user interface (GUI) based semi-automatic hierarchical segmentation scheme, which works in three stages. In the first stage, we process the original image by filtering and threshold the gradient to reduce the level of noise. In the second stage, we compute the watershed segmentation of the image using the rainfalling simulation approach. In the third stage, we apply two region merging schemes, namely implicit region merging and seeded region merging, to the result of the watershed algorithm. Both the region merging schemes are based on the watershed depth of regions and serve to reduce the over …

A Computer Vision System For The Automatic Inspection Of Geometric Distortions In Television Displays, Geoffrey C. Yerem

Masters Theses

The ability to automatically measure the image quality of a television display is a valuable resource. In display manufacturing, automatic inspection enables automatic television alignment, which reduces manufacturing costs and improves product quality. Automatic inspection also comes in handy during competitive analysis and engineering review. Primarily though, commercial inspection systems are built and used for manufacturing.

In the past two decades, the advent of microcomputers has made automatic inspection feasible through the use of computer vision. Most of the approaches developed can be divided into two groups: fixtured systems, with fixed or movable cameras, and position independent systems, which …

Implementation Of Wavelet Transform And Area, Power And Delay Design Space Exploration, Sowmyan Rajagopalan

Masters Theses

The need for designing chips that are smaller, faster and less power consuming has been increasing, as these chips are increasingly being used in communication and portable electronic devices. These design space vectors also play a big role in the profitability and productivity of the vendor and hence prove to be one of the most important steps in the Application Specific Integrated Circuit (ASIC) flow (design process). The research reported here consists of implementing the Wavelet Transform using a hardware description language (VHDL) and testing the Register Transfer Level (RTL) for its functionality. The RTL was synthesized and optimized using …

An Externally-Synchronized Coherent Communication System Design, Gary R. Ragsdale

Doctoral Dissertations

The research described within this dissertation was initiated on October 1, 1997 to investigate communication link performance improvements made possible by using a frequency reference supplied by a residual carrier broadcast. The primary link types considered were radio frequency links, although prior research in externally-synchronized bistatic radar was also considered.

Conventional radio frequency communications links transfer information from transmitter to receiver by modulating a carrier signal at the transmitter and demodulating the received signal at the receiver. Demodulation can be done coherently or noncoherently. That is, the information on the received signal can be recovered by comparison of the received …