Spectral profiles between elc image and original image

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Reference no: EM133205963 , Length: Word count: 2 Pages

Question 1: Display and compare differences of the spectral profiles between the ELC image and the original image for (Hint: You need to display, describe the differences, copy/paste spectral profiles of ELC image and original image):

- Healthy Vegetation

- Urban

- Sea Water

Question 2: Do you think the ELC method corrected the atmospheric effect very well? What errors might be included in your ELC method (Hint: Spatial and temporal errors, not perfectly matching between image spectra and in situ/field spectra; white point(s) is not whitest and black point(s) is not blackest, leading to negative or >1 ELC pixel values)? Evaluate your ELC result (Hint: Check ELC image profiles patterns and percentages of negative and > 1 ELC pixels).

Question 3: Which features (targets, land cover types) have a possible negative reflectance or the reflectance larger than 1 per band (Hint: you might want to use Display/Profiles)? Why do you think your result has the reflectance less than 0 or larger than 1 (Hint, Not so whitest and blackest for image spectra for simulating calibration models)? How can you fix the problem (Hint: Either re-do ELC or assign all unreasonable ELC pixel values within 0 - 1)?

Reference no: EM133205963

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