We propose new instrumentation to measure the refractive index (RI) of transparent liquids as a function of temperature. The physical phenomenon used to carry out the measurement is the light refraction that occurs in transparent liquids. A width change in a reference object is produced by light refraction, which is related to the RI. Image processing was used to measure the object width using an image from a digital microscope. The instrument measures the RI from a range of 15°C to 100°C with an accuracy of 10 − 4 % . The measurement procedure was calibrated with distilled water and acetonitrile samples, and the Sellmeier and Cauchy equation was used to compare our results. Finally, as an appropriate application, the RI of lophine in a solution was measured.
KEYWORDS: Image processing, Video, Cameras, Digital signal processing, Video processing, Image analysis, Sensors, Detection and tracking algorithms, Field programmable gate arrays, Prototyping
This article shows the application of the advantages offered by the SURF algorithm for the detection of points of interest in the video images, which are monitored in real time, of the concrete units that form a breakwater. This procedure of monitoring and analysis of the images allows determining the displacement suffered by the elements or shells of the breakwater and consequently the damages submerge the breakwaters. This technique is applied in modeling studies in hydraulic coastal laboratories. Damage can be weighted as a percentage of the total number of armor units on the slope of the breakwater, per unit of area covered by video camera monitoring and digital image processing with the SURF algorithm to determine the movements of the elements of the housing properly and efficiently.
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.