I have a raster with three bands (RGB). I have used the reclassify tool to select only pixels within a certain range of the top band (Red). Those are assigned 1 and all others are assigned 0. In order to fine tune my classification, is it possible to use the other bands as well?
Thanks to Michael Stimson for the advice. Here is my process:
I am starting with a zone from a raster which includes a parking lot:
The image is here:
The more colorful pixels on the right represent parked cars. I would like to select only those pixels containing no cars (empty spaces). For now I will ignore the greenspace on the left and repeat this process with a better clip.
Since I would like to classify pixels by multiple band criteria, I need to create a separate raster for each band. This is achieved with the Extract Bands function (Imagery Ribbon, Analysis Group, Raster Functions then type "extract" in the search.)
Parameters for the red band are here:
This extracts the red band, repeat for the other two. The resulting bands are in three separate rasters here:
Finally use the raster calculator to classify based on red, green and blue pixel values:
Con(("Red_FTC_Zone_1" < 110) & ("Blue_FTC_Zone_1" < 105) & ("Green_FTC_Zone_1" < 110),1,0)
This produces a reclassified raster. This example is not quite right yet. The parameters of the reclassification will now be refined to produce a reliable model which may be replicated for the other parking zones.
Any suggestions to simplify this process would be appreciated as well.