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General / Adding GCP after mosaic is created
« on: April 17, 2014, 12:32:16 AM »
Hello all,
I'm running PhotoScan 1.0.4.1847.
I successfully created an RGB mosaic of a stretch of river. I did this without ground control at first. It went smoothly and the end mosaic looks good. 400m AGL, pixel resolution should be 13 cm. Canon S95.
If ground crew does not lay out air targets for the flight, we use features from a basemap that we can get online. However, I need a mosaic first to see what features I can see in the mosaic and in the basemap. Now I have a list of GCP and their coordinates ready to import.
Up to this point, I've been opening the existing project, placing my markers in images, importing the GCP file, turning off all the image cameras, changing the projection, running optimization - then going to Build Dense Cloud again to redo the points.
I usually get the error "Can't Build Dense Cloud." Most of the time, after messing around with it a bit (closing reopening, etc), it suddenly works and I don't know why. If I can redo the dense point clouse, I continue with my operations (Mesh, Texture) to make a new mosaic.
However, on this particular project I cannot get past the "Can't Build Dense Cloud" error.
I tried to realign photos (this is after I put in all the GCP) and that only procued half of a project.
What is the right way to add GCP in? Start over with a new project, align photos, then add GCP markers?
I'm running PhotoScan 1.0.4.1847.
I successfully created an RGB mosaic of a stretch of river. I did this without ground control at first. It went smoothly and the end mosaic looks good. 400m AGL, pixel resolution should be 13 cm. Canon S95.
If ground crew does not lay out air targets for the flight, we use features from a basemap that we can get online. However, I need a mosaic first to see what features I can see in the mosaic and in the basemap. Now I have a list of GCP and their coordinates ready to import.
Up to this point, I've been opening the existing project, placing my markers in images, importing the GCP file, turning off all the image cameras, changing the projection, running optimization - then going to Build Dense Cloud again to redo the points.
I usually get the error "Can't Build Dense Cloud." Most of the time, after messing around with it a bit (closing reopening, etc), it suddenly works and I don't know why. If I can redo the dense point clouse, I continue with my operations (Mesh, Texture) to make a new mosaic.
However, on this particular project I cannot get past the "Can't Build Dense Cloud" error.
I tried to realign photos (this is after I put in all the GCP) and that only procued half of a project.
What is the right way to add GCP in? Start over with a new project, align photos, then add GCP markers?
