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Messages - frank.stremke

Pages: 1 ... 12 13 [14]
General / Re: Blender Import
« on: April 26, 2013, 02:08:10 PM »
will do asap and report back here but anyway thanks for the info.
thats a nice feature

General / Re: Blender Import
« on: April 26, 2013, 01:36:49 PM »
In what way shall i make use of the shift feature then?
how does it work?
only option i dont have the fancy looks is in pdf.

General / Re: Blender Import
« on: April 26, 2013, 09:56:48 AM »
there is however the limitation with my hardware even with 32gig ram and nvidia gtx 660 i cna open the object in render (about 500mb) but as i load the texture it crashes and tells me not enough system recources (open gl error)
this is hovever fixed when i use jpg textures they 27mb instead of 163. quality is of course not as good.
anyway if i export it as local coordinates it is fine but if i try UTM in which the whole system was created it just gets very rough and looks strange and simplified.
hoever file size is about the same as in the loc coordiantes even a bit more.
you can see the pictures here
if i whant to combine several models wich are in the same area but not adjoining i thought it might be good to use my coordinate system also for all kind of other advantages i can take readings staight from the model ect.
so i think it is a good feature to export in UTM coordinates but it seems not to work :-( at least for me.

General / Re: Blender Import
« on: April 25, 2013, 11:19:51 PM »
thanks for that,
what format you would sugest colaborates best with blender. Collanda i presume?

General / Re: GCPs in the middle of nowhere
« on: April 25, 2013, 12:59:22 PM »
sorry i have no answere on that question it just improves the cammera position i do not know enogh about this kind of photogrametry and photoscan. however mybe it is posible zo set down the camera position acuracy to ease up the process.
but the again there is the problem of the fast moving aircraft.
so maybe someone more wise on the internal workings of PS can help out here.
best regards

General / Blender Import
« on: April 25, 2013, 12:34:05 AM »
Hi sorry for  general question searched the forum but was not very good at it...
i have created a large model of a query it is about 200m long and 100m wide i whant to have the best textures my computer can handle and crated 25000x25000 pixel textures which looks good for the details i need. but as i understand i can only use 8000x8000pixel textures in blender or am i wrong?
so i whant to reate a clip moving around in the query "flying true the model) using blender how is it posible to keep detailed textures.
would i have to cut the modell into pieces and put it togeter in blender.
best regards

General / Re: GCPs in the middle of nowhere
« on: April 24, 2013, 03:44:12 PM »
hes got different with or without glonass. i use both and it works quite good for rtk
as for the PPP with a single freq you will need of course longer observation time and corection data for post processing.
of course this way it does not work in real time but you only need to do this once for your basepoint and then use differential or RTK for the airborne system.
you can also have a look here if you speek german this hforum was a big help to me

General / Re: GCPs in the middle of nowhere
« on: April 24, 2013, 02:59:09 PM »
its all single freq recievers but thats fine for rtk asl long as you have some more time :-D
hagen is a nice fellow he will be hapy to help you.

General / Re: GCPs in the middle of nowhere
« on: April 24, 2013, 01:37:43 PM »
maybe i can help out with some info here. what you need as i understand is basicly the correctet cammera position while taking photographs.
you can record gps raw data with a loger on the plane (record antenna deviaton from the camera position)
also during the same time have a other GPS rawdata loger placed on the ground closeby or in the survey area at a known location or make it a known location using long term measurement and post processing ppp. (way i just did in sudan)
then you process the recordings with RTKlib
depending on the aircraft speed and other factors such as signal quality obstructions ect. you can use 2 aproches for your data
1. Diferential gps, more robust
2. RTK Phase differential measurements more precise but the GPS signal needs to be recieveded continuisly to interuptions
depending on conditions and base line legth (distance between the two recievers) you can achive an accuracy of 0.5-2m for dgps or a few dm for rtk.
but since the aircraft moves (lets asume 120kts) 62m a second its all relative anyway. if you have your camera and gps clock syncronised its at least not a big problem as for altitude does not change so fast.
you can then process the RTKlib output data (textfile with 3d position) together with your pix in e.g. gpsprune
this will allow you to write the correctet GPS location into the exif data of your pictures
now you are ready to create your model. but you may have to georeference a bit due to the aircraft moving so fast.
iam pretty sure this is not a clean and accademic correct aproach but this is what i would do.
you will be able to by good hardware GPS reciever and hardware for this kind of work for around 1000euros complete build and testet or build it yourself using kits you will find plenty of information once you get into the RTKlib scene. but be advised its a steep learning curve.
btw i bought my hardware here:
hope this helps

General / Re: Kite and camera modell
« on: April 22, 2013, 02:44:46 PM »
Thank you thats a good start.

General / Kite and camera modell
« on: April 21, 2013, 09:45:35 PM »
as i have seen in the forums there are some archaeologists around here and well now its one more.
iam looking on testing kite photography so can someone give me a good recomondation on a simple kite and camera for testing that kind of equipment.
as i gather cannon cameras are posible to reprogramm for intervalls so any recomondations are welcome.
best regrads frank

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