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Remote Sensing & Photogrammetry W2

Remote Sensing & Photogrammetry W2. Beata Hejmanowska Building C4, room 212, phone: +4812 617 22 72 605 061 510 galia@agh.edu.pl. LANDSAT. LANDSAT Orbit LANDSAT 4,5 MSS Sensor Characteristics LANDSAT TM, ETM+ Sensor Characteristics. Landsat handbook Landsat Data is available for FREE.

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Remote Sensing & Photogrammetry W2

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  1. Remote Sensing & PhotogrammetryW2 Beata Hejmanowska Building C4, room 212, phone: +4812 617 22 72 605 061 510 galia@agh.edu.pl

  2. LANDSAT • LANDSAT Orbit • LANDSAT 4,5 MSS Sensor Characteristics • LANDSAT TM, ETM+ Sensor Characteristics

  3. Landsat handbookLandsat Data is available for FREE

  4. Landsat Data is available for FREE • Path: 188, Row: 25 • elp188r025_7t20000507.tar.gz • GEOTIF

  5. Image processing • Pre-processing – later will be explained • Image enhancement • Data extraction – later will be explained

  6. Why?

  7. Histogram

  8. Histogram stretching

  9. Histogram stretching • Linear • With saturation • Histogram equalization

  10. Color modeling

  11. Color image RGB 0.76µm 0.5µm 0.4µm 0.64µm Panchromatic image VIS 0.4µm 1.2µm 0.76µm Remote sensing

  12. Color image RGB 0.76µm 0.5µm 0.4µm 0.64µm Panchromatic image VIS 0.4µm 1.2µm 0.76µm Remote sensing

  13. Remote sensing panchromatic image pixel= 30m, 8 bits [0-255]

  14. Color composite 123

  15. Color composite 123

  16. Photointerpretation • Object: point, line, polygon • Object differs from the background

  17. Image characteristic • Brightness • Contrast • Resolution • Stereoskopy effect

  18. Brightness, tone • Brightness – subjective reaction on the light, subjective perception • Tone – bright, medium, dark, DN

  19. Contrast • CR=Bmax/Bmin • Bmax – max brightness • Bmin – min brightness • Bmin = 0; CR = infinity • Bmin=Bmax; CR = 1

  20. Less contrast • The objects and background have similar spectral response • Scattering of EM radiation in the atmosphere • Not proper remote sensing method

  21. Image characteristic • Brightness • Contrast • Resolution • Stereoskopy effect

  22. STEREOSKOPIA

  23. STRUKTURA PROCESU INTERPRETACJI • Detection – statment of existence of „soemthing” • Recognition – confirmation of the initial assumtion and object classification • Identification – determiantion of the function or genesis of the object

  24. Elements of visual image interpretation image „reading” – direct recognition features of the objects • tone • shape • size • pattern • texture • shadow • association

  25. Photointerpretation key • Part of the image with the object and its descriptions

  26. Remote sensing panchromatic image

  27. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing panchromatic image PAN

  28. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing panchromatic image PAN

  29. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing panchromatic image PAN

  30. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing panchromatic image PAN

  31. Reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing panchromatic image PAN

  32. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) B G R B G R B G R

  33. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) B G R B G R B G R

  34. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) B G R B G R B G R

  35. odbijalność [0-255] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) B G R B G R

  36. odbijalność [0-255] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) B G R las B G R

  37. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) B G R B G R B G R

  38. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) B G R Bare soil B G R

  39. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) B G R B G R B G R

  40. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) B G R

  41. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) woda B G R

  42. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) B G R B G R

  43. reflectrance [0-255] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) Is spectral reflectance in channels charecteristic for specific land cover? B G R

  44. reflectrance [%] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) Spectral curve of different land cover 30 soil wegetation 10 water B G R

  45. reflectrance [%] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) 30 soil wegetation 10 water B G R

  46. reflectrance [%] 0,5 0,6 0,7 0,4 Remote sensing color composit (RGB) 30 soil wegetation 10 water B G R

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