What is the full form of HSI?

Homeland Security Investigations (US Immigration and Customs Enforcement) HSI.

What is HSI in medical?

Hyperspectral imaging (HSI) is an emerging imaging modality for medical applications, especially in disease diagnosis and image-guided surgery. HSI acquires a three-dimensional dataset called hypercube, with two spatial dimensions and one spectral dimension.

What is HSI for Internet?

HSI Service and “High Speed Data Service” mean the online content, features, functions and Services (which may include Internet access), as provided over BLUE STREAM's cable systems.

What does HSI stand for in HVAC?

Some service technicians may be surprised to learn that the silicon carbide element of a hot surface igniter (HSI) can be handled without damage.

What is furnace pressure switch?

A furnace pressure switch is an automatic safety feature located near the motor. It shuts the furnace down if it senses negative pressure created by the draft inducer motor. This protects your home from dangerous backdrafting, which is when exhaust fumes are reintroduced into the system.

HSI at SB55: Training for the Real Thing

What is hyperspectral imaging HSI?

Hyperspectral imaging (HSI) is a technique that analyzes a wide spectrum of light instead of just assigning primary colors (red, green, blue) to each pixel. The light striking each pixel is broken down into many different spectral bands in order to provide more information on what is imaged.

What is hyperspectral imaging used for?

Hyperspectral imaging collects and processes information from across the electromagnetic spectrum. The goal of hyperspectral imaging is to obtain the spectrum for each pixel in the image of a scene, with the purpose of finding objects, identifying materials, or detecting processes.

What is hyperspectral vision?

Hyperspectral vision systems generate data for quality control and also transmit information to robotic actuators, enabling automated picking and sorting of commodities. Hyperspectral imaging involves measuring high-resolution spectral data at every pixel in a 2D image.

What is the difference between hyperspectral and multispectral images?

Multispectral imagery generally refers to 3 to 10 bands. Each band has a descriptive title. For example, the channels below include red, green, blue, near-infrared, and short-wave infrared. Hyperspectral imagery consists of much narrower bands (10-20 nm).

Is Modis a hyperspectral?

Moderate resolution Imaging Spectrometer (MODIS). 36 bands, spectral range between 405 -14385 nm with a slit width about 20 nm, depending on bands. Spatial resolution, 250 to 1000 m, depending on bands.

What is HSI sensor?

Hyperspectral sensors acquire imagery in hundreds of narrow, contiguous spectral bands, which facilitates fine discrimination between different features on the Earth's surface. It is a complementary data source to Synthetic Aperture Radar (SAR) and conventional multi-spectral data.

What is high spectral resolution?

Spectral resolution describes the amount of spectral detail in a band. High spectral resolution means its bands are more narrow. Whereas low spectral resolution has broader bands covering more of the spectrum. For example, a multispectral image breaks light into 4 to 36 bands.

What are multispectral sensors?

Multispectral sensors are the workhorses of drone-based advanced sensing. Their ability to capture data at exceptional spatial resolution—as well as determine reflectance in the near infrared—makes them an extremely versatile and effective sensor.

What causes hot surface ignitor failure?

High Voltage

An 80-volt HSI should have about 80 volts applied to it. Applying 120 volts to that HSI will cause it break, and sometimes almost immediately. Having too low of voltage may not let the igniter burn hot enough.

What is direct spark ignition?

Anyone who has ever started a car has put Direct Spark Ignition to work. The car's ignition coil generates a high voltage charge that arcs across the spark plug, directly igniting the fuel/air mixture in the engine. Such a spark is also used in most appliances to directly light the flammable gas at the burner assembly.

What are the four different types of ignition HVAC?

What spectral means?

Definition of spectral

1 : of, relating to, or suggesting a specter : ghostly We felt a spectral presence in the old ballroom.

What are the four types of resolution?

There are four types of resolution to consider for any dataset—radiometric, spatial, spectral, and temporal. Radiometric resolution is the amount of information in each pixel, that is, the number of bits representing the energy recorded.

What is resolving power in spectroscopy?

IUPAC defines resolution in optical spectroscopy as the minimum wavenumber, wavelength or frequency difference between two lines in a spectrum that can be distinguished. Resolving power, R, is given by the transition wavenumber, wavelength or frequency, divided by the resolution.

What is photo response non uniformity noise?

Photo response non-uniformity, pixel response non-uniformity, or PRNU, is a form of fixed-pattern noise related to digital image sensors, as used in cameras and optical instruments. Both CCD and CMOS sensors are two-dimensional arrays of photosensitive cells, each broadly corresponding to an image pixel.

What is Hypertemporal imaging?

Put simply, hypertemporal imaging involves multispectral or hyperspectral imaging over time. Where persistent surveillance is concerned, it's also a gigantic exercise in gathering gazillions of bits of data, and then throwing most of them away.

What is spectral image technique?

Spectral imaging refers to a group of analytical techniques that collect spectroscopic information and imaging information at the same time. The spectroscopic information tells us about the chemical makeup at the individual points of the image (pixels) allowing a chemical map of the imaged area to be produced.

What is Aqua and Terra?

Aqua (EOS PM-1) is a NASA scientific research satellite in orbit around the Earth, studying the precipitation, evaporation, and cycling of water. It is the second major component of the Earth Observing System (EOS) preceded by Terra (launched 1999) and followed by Aura (launched 2004). Aqua.

What satellite is MODIS?

About. MODIS (or Moderate Resolution Imaging Spectroradiometer) is a key instrument aboard the Terra (originally known as EOS AM-1) and Aqua (originally known as EOS PM-1) satellites.