Erdas imagine 2014 radiometric correction

After the tool completes I opened up the corrected image file to compare the results to the original uncorrected image (Fig. Once I save the regression information I closed out the Atmospheric Adjustment Tool and run the Atmospheric Adjustment from the Spectral Analysis Workstation window. Once all of the samples have been entered the Spectral Analysis Workstation calculates a regression equation for each of the bands. I added spectral library samples ( Pine Wood, Grass, Alunite AL 706 Na, and tap water) which were the best available matches in the library for my sample selections. Next I added a few more samples from a forested area, agricultural land, metal roof, and a lake selecting a different color for each sample. 3) Atmospheric Adjustment Tool window with Sample and Reference sample selected. I zoomed in the image to an area I was familiar with and used the Create a point selectorВ to select the center of a roadway.В After collecting the sample I searched through the ASTER library and found Asphaltic concrete which I had to click and drag on to the Spectral Plot graph below the list (Fig. The first task is to collect a spectral sample of a asphalt road surface from my image. We will be using the ASTERВ spectral library for the correction of this image. (Fig 2.) Spectral Analysis Work Station with image displayed in false color infrared (4,3,2)ДЇor the next step I opened the Atmospheric Adjustment Tool window and changed the method tab to Empirical Line. Once my image was added to the work station, I changed the band combination from true color (3,2,1) to false color infrared (4,3,2) (Fig. In order to perform ELC I will be utilizing the Spectral Analysis Work Station which is found under the Raster tab and the Hyperspectral sub-tab.

I was provided the ELC equation by my professor (Fig. I do not have any in situ data from the day and time my image was collected so I will be consulting a spectral library to perform my ELC correction.

Performing ELC is still possible through the use of spectral libraries to obtain in situ data for some of the surfaces within the image. The majority of in situ data is not available for older or even present day data. To perform ELC to correct remotely sensed images you need in situ spectral reflectance measurements from the same time the image was collected. The first part of the lab I will be conducting Empirical Line Calibration (ELC) to correct atmospheric interference on a Landsat 5 TM image of Eau Claire, WI and the surrounding area.

The second objective of the lab will have me performing relative atmospheric correction on remotely sensing images.ДЄll of the following methods were performed in ERDAS Imagine 2015 unless noted.ДЄbsolute Atmospheric Correction Using Empirical Line Calibration The first objectives of this lab will have me performing atmospheric correction using multiple methods on remotely sensed images. The main purpose of the lab is to provide me (the student) practical experience correcting atmospheric interference on remotely sensed images.

Erdas imagine 2014 radiometric correction