Messages

76

General / Re: Agisoft and machine vision cameras is it possible?

« on: May 09, 2012, 01:30:37 PM »

Hello Alexey,

Excellent news!

I don't have any one particular application in mind for the use of machine vision cameras at this time. However, I have access to quite a few good quality CCD MV cameras and I thought it would be interesting to try them.  I think I will experiment with this!

Cheers,

Mr. Curious

Hello Mr. Curious,

Actually there is no difference for PhotoScan in the method of how the images were acquired.

I assume that the workflow with such images (or video frames) is similar to standard PhotoScan processing. Maybe additional attention should be paid for camera calibration.

Could you please describe the task that you wish to complete with PhotoScan and machine vision cameras?

77

General / Agisoft and machine vision cameras is it possible?

« on: May 04, 2012, 01:25:35 PM »

My curious mind can't help but wonder if it is at all possible to use Agisoft with machine vision video cameras?  It would be really cool it it were possible.

So tell me, is this possible?   And if so, how would one do it?

Thanks!

Mr. Curious

78

General / Lighting for 360 3d capture

« on: April 27, 2012, 04:38:55 PM »

Hello,

I'd like to try and do a 360 degree scan of a person standing in an indoor studio. Can anyone with any experience of doing this give me some tips regarding the best way light the stage were my subject is standing in order to capture quality images for Agisoft both in terms of geometry capture and texture recreation.  I'm trying to learn the best way to go about this, can anyone share some hints & tips.

Many Thanks!!!

Mr. Curious 

79

General / Re: Pre-sales query No. 2, Large area outdoor scans?

« on: January 20, 2012, 03:36:04 AM »

Thank you Jim for the GREAT suggestions and advice!!  You've got me thinking now :-)  Looking forward to trying this as soon as it stops snowing :-/

Thanks again.

Mr. Curious

Hello Mr. Curious,

I have had good success with modeling outdoor scenes by using a compact camera or DSLR camera on top of a range pole or a telescoping hydro line pole - like the Tele-Pole.  You must be extremely careful of overhead power lines and MUST keep ten metres or more away.  The power can arc to your pole and electrocute you.  The Hydro poles are dialectic tested normally to 10,000 volts - don't try to test it - just do a hazard assesment before imaging at each scene.

You can easily build an adapter for the range pole to mount the camera.  I suggest that you take elevated panorama images from various locations as well as the modeling images.  You can set your camera to take HD video images and just walk around the site in a systematic manner to cover the scene.  Photos can be extracted at a one second rate or so with DVD Videosoft (free) very easiy and then used to create the model in Agisoft Photoscan.  You may also want to try fabricating a manual shutter trigger that will hold the shutter down in continuous shoot mode.  The camera should be pointed downwards at an angle not more than 30 degrees to the nadir for best results.

The scene models should work well fom that type of source image.  You will likely have trouble obtaining clean models of shiny obects such as cars.  This is where the panorama's can fill the visual gap of any objects that do not model well.

I hope that helps.

Jim

80

General / Re: Pre-sales query No. 2, Large area outdoor scans?

« on: January 04, 2012, 12:20:08 PM »

Try to cover "scene" with photos that overlap 60-80 % with photogrametry in mind, not the panorama photo style, that mean try to shoot so that you move around the scene. go shoot some photos and then will explain if is that good and what to do with photos that scene is better. and yes it can be done but as i wrote some guidelines must be folloved....

Hello Wishgranter,

Thank you for the explanation, I understand.  I will shoot some photos as soon as I can and post my results on-line for analysis.  The weather is very bad here at the moment, but I hope to do this soon.

Thank you again.

Mr. Curious

81

General / Re: Pre-sales query No. 2, Large area outdoor scans?

« on: January 03, 2012, 04:36:45 PM »

Have you some photos of scene that you describe ?

No I'm afraid that I don't access to any further details or data as this is for a pending legal case so the client has not provided me with many details.  The client has simply asked me if it would be "possible" for me to provide them with a scan of large outdoor scene.

I suppose this would be easy enough to test by simply taking some photos of a "similar" intersection.

What would be the best way to approach photographing this?  Should I just aim my lens at some central point in the center of the scene and then move along the perimeter of the roadway intersection while taking photographs?

Thanks!

Mr. Curious

82

General / Pre-sales query No. 2, Large area outdoor scans?

« on: January 03, 2012, 04:07:38 PM »

Hi,

One further question.

Would Agisoft be a good solution for the following?   I've been asked if I could scan a large outdoor area, specifically the scene of an accident at a roadway intersection.  I guess typically this sort of thing would be done using a lidar solution, but I am curious to know if Agisoft would also be a good candidate for such a job?  Has anyone used Agisoft for such a purpose?

Mr. Curious

83

General / Re: Pre-sales query

« on: December 07, 2011, 06:46:27 PM »

I can tell you, I have been trying to model custom choppers and the chrome is just a nightmare.  If things are matted down it improves vastly.  Saying that I've been very pleased with the software for other small engineering items photographed on a turntable against a matt background.

            Joules

Thanks Joules!

I had no doubt that chrome, shiny or transparent objects would create problems.

Using dulling spray does seem to help a lot... I continue to experiment.

Again, thanks for sharing your experiences, I appreciate it!

Mr Curious

84

General / Re: Pre-sales query

« on: December 05, 2011, 04:51:44 PM »

Hello Mr. Curious,

If the stickers are too small it would not help, because there would still be large areas.

I think there could be a few alternative ways. For example you can project some kind of pattern on the surface or cover the car with something that could be easily washed off (whitening or flour, for example). Maybe placing some kind of textured materials inside the car to the windows would also be helpful.
Or you can take a photos of heavily mudded vehicles.

Yes, we seem to be thinking along the same lines, I had many similar ideas!  I will make my purchase and then experiment!  Thank you for your kind reply.

Mr. Curious

85

General / Re: Pre-sales query

« on: December 05, 2011, 03:37:36 PM »

I understand completely.

Would it be at all helpful if I could randomly place some targeting dots (adhesive stickers) on the surface of the car?

Thanks!

Mr. Curious

86

General / Pre-sales query

« on: December 03, 2011, 04:27:48 PM »

Hi,

I am considering purchasing however I've got a question that I'm hoping someone can help me with.  I would like to scan actual automobiles with Agisoft and I would like to know if anyone has done this and/or if it is possible?  Specifically, I would like to be able to scan a car that is parked outside, on a street, in a normal outside environment.  Is it possible to scan something like a car in such a non-controlled environment.  If so, I'd like to know what steps I would need to take in order to achieve a good scan using Agisoft.  If this can be done, I'll be making a purchase for sure!

Hope someone can share their experiences with me.

Thanks!

Mr. Curious