Quantification of Plume Opacity by Digital Photography
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چکیده
Same as Report (SAR) 18. NUMBER
منابع مشابه
Quantification of plume opacity by digital photography.
The United States Environmental Protection Agency (USEPA) developed Method 9 to describe how plume opacity can be quantified by humans. However, use of observations by humans introduces subjectivity, and is expensive due to semiannual certification requirements of the observers. The Digital Opacity Method (DOM) was developed to quantify plume opacity at lower cost, with improved objectivity, an...
متن کاملField evaluation of digital optical method to quantify the visual opacity of plumes.
Visual Determination of the Opacity of Emissions from Stationary Sources (Method 9) is a reference method established by U.S. Environmental Protection Agency (EPA) to quantify plume opacity. However, Method 9 relies on observations from humans, which introduces subjectivity. In addition, it is expensive to teach and certify personnel to evaluate plume opacity on a semiannual basis. In this stud...
متن کاملEvaluation of digital optical method to determine plume opacity during nighttime.
United States Environmental Protection Agency (USEPA) set opacity standards for visual emissions from industrial sources to protect ambient air quality. USEPA developed Method 9, which is a reference method to describe how plume opacity can be quantified by human observers during daytime conditions. However, it would be beneficial to determine plume opacity with digital still cameras (DSCs) to ...
متن کاملDetermination of Visible Emission Opacity from Stationary Sources Using Computer-Based Photographic Analysis Systems
(a) Many stationary sources discharge visible emissions into the atmosphere, which are usually in the shape of a plume. The following method describes a technical approach for determining the visible opacity of plume emissions through the use of photographs taken of the regulated source under compliance enforcement conditions. The photographs are processed using computer software that determine...
متن کاملField Testing of the Digital Opacity Method to Quantify Plume Opacity
U.S. Environmental Protection Agency (USEPA) established Method 9 as a standard method to quantify plume opacity. However, there are issues about the subjectivity of such method . The appearance of the plume to human observations can be affected by many factors, such as the angle of the sun, the time of the day and the geographic location of the source . A new digital photographic method, Digit...
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