Messages

181

General / Underground work

« on: June 17, 2013, 06:51:42 PM »

hi
after an sucsesfull season this year with only some tests with photoscan along traditional survey we foud that it is by far the best way to record ancient quarries in our project however the work from this year was only done in daylight. next season we will try to do some work in the underground. so iam gattering ideas on lighting and procedures. how the quarries look can be seen on the picture




so it is many corners and edges.
would be great if you could share your thougts on propper procedures for photography and ilumination
thanks
frank

182

General / Re: Detect markers

« on: June 03, 2013, 02:14:50 PM »

i never tryed it yet but i think it is extremely usefull for tight areas like architecture and when you use lots of points it alows you to find and read the information coded in the markers you can crate with PS so the marker nr is coded in the marger geometry. you can print this markers and place them in the area you are going to scan then you just need to enter the parker number which is writen next to it on the printout as a pointnr in your total station and measure it.
later when you have your pictures and your total station file you can simply use the total station points with the ground control import function and it will conect the points with the photos using the detect markers funktion it now has the marker in the photo its number and from the file the coordinates.
all it needs and you can save yourself lots of time. but for arial photography i can imagine this markers need to be realy big....
frank

183

General / 3d mode

« on: May 30, 2013, 09:56:33 PM »

hello,
i usualy use anaglyph if i whant to watch my model in 3d or search for errors which are much easier to find in 3d.
however anaglyph is not realy good since i usualy have some gohst images and also it is hard to make a clear cut with the selection tools.
therefore i would like to use a different technique like shutter glasses or so. i use a 3monitor setup and can not change my monitors is there a system which is knwn to work with photoshop. i have my old edimensional glases bud they refused to work properly with xp so i doubt they will in win 8.
best regards
frank

184

General / Re: No Callibration on Photo allignment

« on: May 17, 2013, 01:06:05 PM »

thanks for the info
can this problem also be bypassed by using agisoft lens?
just asking because i dont have the camera here and cant try.
frank

185

General / No Callibration on Photo allignment

« on: May 16, 2013, 01:34:31 PM »

hi all
i was testing with some pictures taken by my dads camera however all the photos get an NC after imprting them to show they are not callibratet.
the camera is a olympus E500 in the exif i can see all the data BUT no 35mm focal info that one is missing in the PS exif information
you can find the file here
https://dl.dropboxusercontent.com/u/81272934/148582.JPG
this problem applyes to both jpg and raw taken with the camera
frank

186

General / Re: Synchronizing GPS clock and camera Clock for geotagging

« on: May 15, 2013, 10:12:44 AM »

hi
you can use GPSprune for writing the gps position from a gpx or text file to the pictures it can even handle offsets and does whole folders at one go.
you can either set the time on your camera corectly or work with ofsets.
if your gps unit does not display the time then you can use any other source for UTC time (not utm by the way)
usualy your pc can do this for you with the time sync
or see here
http://www.bipm.org/en/scientific/tai/time_server.html
to work with ofsets do as discribed and take a picture of a corect watch radio controled watch will work as well you will just have to aply hour corections.
most cameras will not allow to see or set seconds however they will be in he exif file
to sett the clock corectly have a look on a corect utc clock and sett the camerea watch to the next minute pressing enter or ok once the seconds are up and the counter on the watch jumps to the new minute which you have sett on your camera now the cammera should have the correct time.
make shure to set the right date as well or gps prune will have trouble.
best regards
frank

187

General / Re: Problem with markers

« on: May 06, 2013, 09:43:52 PM »

try to stik to the worrkflow as described in the tutorials on the website for using ground control.
also it seems to be much more acurate to place the markers on the photo instead of the model...
best regards
frank

188

General / Re: how to find bad alligned photos

« on: May 01, 2013, 11:35:45 PM »

another problem with alligning i came around just now..
i alligned 118 pictures and got 109 alligned automaticly however i decided to turn the project into  a chunk of a larger project and there i just get 84 alligned automaticly using the same settings.
does anybody have an idea why this could be the case...
frank

189

General / Re: how to find bad alligned photos

« on: April 30, 2013, 09:44:38 PM »

thanks thats the tool i need but unfortunaly id did not realy do the job. because of me taking the photographs wrong.
because if i select some of the wrong points i get lods of photos from the filter. i think the problem is: while walking around the mountain i was walking a bit then taking a series of photos to cover the whole mountainface from this location so now camera locations are very close together. i try now with selecting only one photo of every location maybee that wil help. is there any function to sett a minimum distance between camereas or a filter wich can help me?
frank

190

General / how to find bad alligned photos

« on: April 30, 2013, 07:16:21 PM »

when looking at my sparse point cloud i can see a whole bunch of wrong points. the seem to form a second Chostsrface floating over the actual one. when building geometry i get a mushrom like shape bloming on tom in arbitraty mode and in high field many spikes....
so i would like to get rid of thes points but gradual selection and manual deleting does not work so i would like to find out which cameras are responsible for these pionts without having to realign all pictures is there a way to know from wich camera these points came or to speed up testing.
frank

191

General / Re: Photoscan & Windows8

« on: April 30, 2013, 07:09:37 PM »

works perfect with me ...

192

General / Re: yaw, pitch, roll using a tripod.

« on: April 30, 2013, 01:27:35 PM »

as far as i understand from the tutorial vidio it is not yet used information

193

General / Re: Can't get any usable results

« on: April 30, 2013, 09:24:50 AM »

hello,
since your object does not have many good features as does the white table it is standing on try to place your object on something with more features but not regular (pattern) ones.
for example try a newspaper ( not a glosy one of course) after building geometry you can cut it a way
frank

194

General / Re: Suggestions for processing 360° horizontal imagery?

« on: April 27, 2013, 11:40:25 AM »

my expierience with orthophoto from shallow angle imagery is very bad very much disortet testures it actualy looks much better on the shaded object then on the textured. if the nummer of vertices is high enogh of course.

frank

195

General / Re: chunks alignment problem

« on: April 27, 2013, 11:36:10 AM »

hi
since i made the same mistake an hour ago...
you have to merge the chunks after allignment of course to see results.
bets regards
frank