Log-polar or spatially variant image representation is an important component of active vision system in tracking process for many robotic applications due to its data compression ability, faster sampling rates and hence, direct to faster image-processing speed in machine vision system. In this paper, we try to implement log-polar mapping techniques on Xilinx FPGA (Field Programmable Gate Array) board for unwarping the omnidirectional images into panoramic images to present a wide angle of view by preserving fine output image quality in a higher data compression manner. Simulations are also run on MATLAB to find out the optimum mapping criterion. Some significant advantages of this new approach are: lighter processing system, lesser space utilisation, cost saving, faster processing speed and faster reset time (boot time) compared to a laptop computer that uses MATLAB for doing the unwarping process.
New Maps from Old Photos: Measuring Coastal Erosion
U.S. Geological Survey scientists and their coauthors from the CaliforniaCoastal Records Project have found a way to use historical aerial photographs not just to see evidence of coastal erosion, but to accurately measure how much has occurred over time. Applying a low-cost technique called “structure-from-motion” to five sets of oblique aerial photos spanning the years 2002 to 2010, the scientists measured the volume of material eroded from coastal cliffs at Fort Funston, on the westernmost edge...
Modeling Tip: Importing a Map Image File into BREEZE AERMOD or 3D Analyst
Imported maps can be very helpful when setting up a model scenario and analyzing the results. They can be used as a QA/QC method for ensuring that model objects are in the correct locations and they can also help better visualize results graphically. Although a map file is not required,BREEZE AERMODandBREEZE 3D Analystmake it so easy to import maps that it will become a routine step in your model setup and analysis. Follow the steps below to import an image file using a reference point and known distance between...
8 maps show plastic’s impact on the world’s oceans — and what’s being done about it
The world’s oceans are awash in plastic pollution, and as these maps and charts show, the situation is poised to worsen unless drastic changes take place. Over the coming decades global plastic production is slated to increase nearly sixfold, and collection and recycling systems in many parts of the world already are struggling to keep up with the proliferation of plastic products and associated waste. Broadly speaking, plastic pollution comes from three main sources: single-use applications such as food...
Study offers first-ever map showing groundwater pollution of coastal areas of United States
The study identified 12 percentof the continental U.S. coastline — including the northern Gulf Coast from Mississippi to the Florida Panhandle, northern Atlantic Coast, and Pacific Northwest—where the once-hidden drainage systems make the ocean most susceptible to freshwater contamination from septic tanks and fertilizer runoff. In contrast, another 9 percentof coastline— including confirmed locations such as southeastern Florida, southern California, and Long Island—are especially...
Map Algal Blooms with Satellite Remote Sensing Technology
The quality of water bodies is a key determinant in the usability of the resource for the purpose required. It is therefore of great importance to managers of hydrologic resources to be able to confidently tell the status of their water resource. One of the major problems in the quality of surface water bodies is the blooming of algae and blue green algae. Algal blooms can result in ecological, social and economic depreciation of lakes and reservoirs and other surface water bodies with a possible adverse effects...