Timeline for Normalize raster values to 0-255
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jul 9, 2012 at 9:57 | vote | accept | vascobnunes | ||
| Jun 30, 2012 at 7:34 | history | tweeted | twitter.com/#!/StackGIS/status/218970776769003520 | ||
| Jun 30, 2012 at 6:31 | answer | added | spatialthoughts | timeline score: 12 | |
| Jun 29, 2012 at 16:31 | vote | accept | vascobnunes | ||
| Jul 9, 2012 at 9:57 | |||||
| Jun 29, 2012 at 16:14 | answer | added | Jeffrey Evans | timeline score: 17 | |
| Jun 29, 2012 at 16:00 | comment | added | whuber | Because it's a ratio, watch out! E.g., if it's a ratio of two 0-255 images with equalized histograms, then half the ratios will be between 0 and 1 while the other half will be between 1 and 255 (and some will be undefined): that's a huge discrepancy in ranges! Depending on your purpose, the logarithm of the ratio might be a better quantity to compute; better yet, compute log((1+band1)/(1+band2)) to avoid undefined quantities. At the very least this will produce a more readable map. | |
| Jun 29, 2012 at 15:43 | history | asked | vascobnunes | CC BY-SA 3.0 |