Difference between revisions of "Dealing with image data"
Jump to navigation
Jump to search
Kevin Dunn (talk | contribs) m |
Kevin Dunn (talk | contribs) m |
||
| Line 11: | Line 11: | ||
== MACCMIA exercise == | == MACCMIA exercise == | ||
===Background === | |||
If you have MATLAB, please [[Media:Maccmia-1.9.zip | download and install MACCMIA]] for to complete the questions below. | If you have MATLAB, please [[Media:Maccmia-1.9.zip | download and install MACCMIA]] for to complete the questions below. | ||
| Line 25: | Line 26: | ||
* You can [http://en.wikipedia.org/wiki/Landsat_program read more about the Landsat program] | * You can [http://en.wikipedia.org/wiki/Landsat_program read more about the Landsat program] | ||
# | === Questions === | ||
# | # Identify some water pixels from the Potomac river in the score plot. Where are they located? | ||
# Mask these water pixels to highlight the entire river. Notice how you have to adjust the mask to get both the shallow and the deep water pixels. | |||
# Notice how the pixels from half of the [[http://g.co/maps/njb7n Georgetown Reservoir]] show up with the river's pixels, and the other half show up entirely different. | |||
Revision as of 00:32, 7 November 2011
Class 9: Dealing with image data for product appearance monitoring (04 November)
<pdfreflow> class_date = 04 November 2011 [19 Mb] button_label = Create my projector slides! show_page_layout = 1 show_frame_option = 1 pdf_file = lvm-class-9.pdf </pdfreflow>
MACCMIA exercise
Background
If you have MATLAB, please download and install MACCMIA for to complete the questions below.
- Data file: a 7-channel Landsat image of Washington D.C. and the corresponding Google map.
- The image is a 1024 x 1026 x 7 cube, using 7.3 Mb of storage
- Channel 1 = blue/green [450 to 520 nm]
- Channel 2 = mainly green [520 to 600 nm]
- Channel 3 = red [ 630 to 690 nm]
- Channel 4 = Near infrared [760 to 900 nm]
- Channel 5 = Moisture and vegetation sensitive mid infrared [1550 to 1750 nm]
- Channel 6 = Thermal infrared [10400 to 12500 nm]
- Channel 7 = Mineral-sensitive mid infrared [2085 to 2350 nm]
Questions
- Identify some water pixels from the Potomac river in the score plot. Where are they located?
- Mask these water pixels to highlight the entire river. Notice how you have to adjust the mask to get both the shallow and the deep water pixels.
- Notice how the pixels from half of the [Georgetown Reservoir] show up with the river's pixels, and the other half show up entirely different.