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- <h1></h1>
+ <h1>Assigment 8: Image enhancement, filtering and sharpening
+</h1>
Here are my notes from today.
values. This is because sensor data in a single image rarely extend
over the entire range of possible values.
-Evaluation of the different bands
-=================================
+<h2>Evaluation of the different bands</h2>
-band 1, blue (0.45-0.52 um)
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+<h3>band 1, blue (0.45-0.52 um)</h3>
Visible light, and will display a broad range of values both over
land and water. Reflected from ice, as those are visible white and
30 and 136. Mean values of 66.0668. There are one wide peak with
center around 50. There are two peaks at 0 and 255.
-band 2, green (0.52-0.60 um)
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+<h3>band 2, green (0.52-0.60 um)</h3>
Visible light, and will display a broad range of values both over
land and water. Reflected from ice, as those are visible white and
to 120. The mean value is 30.9774. There are two main peaks at 20
and 27. There is also a pie at 0.
-band 3, red (0.60-0.69 um)
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+<h3>band 3, red (0.60-0.69 um)</h3>
Visible light, and will display a broad range of values both over
land and water. Reflected from ice, as those are visible white and
t 135, with one wide peak around 52. There are also seem to be two
peaks at 0 and 255. The mean value is 34.3403.
-band 4, near-infraread (0.76-0.90 um)
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+<h3>band 4, near-infraread (0.76-0.90 um)</h3>
Water acts as an absorbing body so in the near infrared spectrum,
water features will appear dark or black meaning that all near
show most values between 7 and 110. The mean is 40.1144. There are
two peaks at 7 and 40.
-band 5, mid-infrared (1.55-1.75 um)
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+<h3>band 5, mid-infrared (1.55-1.75 um)</h3>
The ice, glaciers and water do not reflect any mid-infrared light.
The histogram show most values between 1 and 178. The mean is
49.8098 and there are two peaks at 6 and 78, in addition to two
peaks at 0 and 255.
-band 6, thermal infrared (10.4-12.5 um)
----------------------------------------
+<h3>band 6, thermal infrared (10.4-12.5 um)</h3>
Display the temperature on earth. We can for example see that the
ice is colder than the surrounding areas. The histogram show most
values between 36 to 122. The mean is 102.734. There are one wide
peak around 53, in addition to two peaks at 0 and 255.
-band 7, mid-infrared (2.08-2.35 um)
-------------------------------------
+<h3>band 7, mid-infrared (2.08-2.35 um)</h3>
The ice, glaciers and water do not reflect any mid-infrared
frequencies. The histogram show most values between 77 and 150.
- non-vegetation is red or brown.
-Filtering and image sharpening
-==============================
+<h2>Filtering and image sharpening</h2>
We decided to work on the grey scale version of the thermal infrared.
This one has lower resolution then the rest of the bands, with 120m
<address><a href="mailto:pere@hungry.com">Petter Reinholdtsen</a></address>
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+Last modified: Sun May 1 14:21:26 CEST 2005
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