Hi,
Appart from checking the content of your float images, I would
suspect the "-threshold" setting needs to be tuned. I am not sure if
this setting is independant from pixel values.
HTH,
Guillaume
On 01/25/2016 07:03 PM, Paul Magdon
wrote:
Hi all,
I am struggeling with HolologousPointsExtraction for a
multi-temporal set of RapidEye images (5m Resolution)
When I run the following code on the raw integere value image
(u16bit) I get a large number of homolgous points (>10000).
otbcli_HomologousPointsExtraction
-in1 "imageA_int.tif" -band1 4 -in2 "imageB_int.tif" -band2 4 -backmatching
1 -precision
10 -mfilter
1 -threshold
0.6 -mode
full -2wgs84 1 -elev.geoid
dtm_utm32_wgs84.tif -out
tie_points.txt -outvector
tie_points.shp
However, when I convert the images to floating point values
(Float 32bit) when calulating TOA I don't get any match points
for exactly the same images
otbcli_HomologousPointsExtraction
-in1 "imageA_float.tif" -band1 4 -in2 "imageB_float.tif" -band2 4 -backmatching
1 -precision
10 -mfilter
1 -threshold
0.6 -mode
full -2wgs84 1 -elev.geoid
dtm_utm32_wgs84.tif -out
tie_points.txt -outvector
tie_points.shp
Any suggestions?
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Guillaume PASERO
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