Messages

1

General / Re: markers not appearing on scanned mesh

« on: April 21, 2025, 09:57:41 PM »

Hello,
sorry for the late reaction;
the purpose is to align the scanned mesh with the photogrammetry mesh so I can put the texture from photogrammetry on it.

Thanks.
Hans.

2

General / markers not appearing on scanned mesh

« on: April 06, 2025, 09:02:15 AM »

Hi
I've imported a scanned mesh in a separate chunk. I create markers on the surface but no markers can be seen. They appear in the chunk but not on mesh. How can I solve this? (obviously I can't put markers on photographes)

Regards
Hans

3

Bug Reports / fit scale

« on: March 28, 2025, 12:14:09 AM »

it has always been confusing..... align chunks > fix scale: check it means don't change the scale. it means fixate, not fix things so change one of them to match.
 Oke I got used to it , so it means fixate.
now the confusion may start all over again; now it says FIT. does it mean change scale to match or is it still fixate? the window says fit, the manual says fix.

regards
Hans

4

Camera Calibration / Re: focal length px changes during pre-calibration

« on: October 10, 2024, 12:08:52 PM »

Hi Alexey,
I will send files if you still think it is nescessary a this message;

The considerable distance is not between  pre-calibrated values and estimated, but between initial tab and estimated/pre-calibrated.
I add illustrations where you can see the initial (calculated) values are f 7634  and the estimated values are f 8969. My question was why they are so different?

I was wondering if I should fix the initial (f 7634) value, but I see clearly now that value should not be used.(noticing this value was confusing for me.) Also distortion plot shows a lot of red (chessboard calibration); is that a problem?
Remains the question: why so big a difference.

Thanks.

Hans

5

Camera Calibration / Re: focal length px changes during pre-calibration

« on: October 04, 2024, 08:11:41 PM »

Thanks Alexey,
the point is: I don't know if I want to keep some parameters unchanged. I would think the self calculated figures for f  would be oke and maybe fixated. But doing that the object looks way distorted and the figure calculated by metashape is way diifferent en delivers much better result. I don't know what causes this extreme difference.
Hans.

6

Camera Calibration / pre-calibration: all images in 1 group or rotated images in own groups?

« on: October 04, 2024, 08:06:35 PM »

I am confused,In pre-calibration we rotate the camera...0 degrees, 90 degrees, 270 degrees when using the scene for this (so not chessboard).  Should all these images be put in 1 camera calibration group or should it be 3 groups, that will be aligned together?
regards
Hans

7

Camera Calibration / focal length px changes during pre-calibration

« on: September 06, 2024, 04:20:21 PM »

Hi
F (focal length inpx) parameter is calculated using focal length mm devided by pixel size mm. In the initial tab it shows the right F(px) as 7634.75008
after using 9  checkerboard images for pre-calibration it is changed to 8971.2534.
My question is: why?
and: can I fix the initial figure prior to the actual calibration, or is that not the way to go?
Thanks

8

General / Ground sampling distance for 3D objects

« on: May 17, 2024, 09:25:22 AM »

hi all,
I asked this question in camera calibration group but Iguess this is the correct group...
is ground sampling distance for 'true' 3d objects usefull? is the figure we get on page2 report the average?
  want to get a kind of level of quality that can be compared.

thanks,
HansCastrop

9

Camera Calibration / GSD ground sampling distance for statues

« on: May 15, 2024, 09:46:46 AM »

hi all,
is ground sampling distance for 'true' 3d objects usefull? is the figure we get on page2 report the average?
  want to get a kind of level of quality that can be compared.

thanks,
HansCastrop

10

Camera Calibration / calibration in each photo?

« on: April 26, 2024, 11:17:54 AM »

Hi
I have 4 camera calibration groups (different settings so one group per setting) and calibrate each group separately. Is camera calibration stored into each photo so I can merge all photos to one chunk  and have them aligned together again?  or is original calibration lost?

11

Bug Reports / Re: generating masks defocus area behaves like import from model

« on: March 09, 2024, 01:32:34 PM »

Thank you Alexey,
yes, it's the same problem. and as far as I can see it's solved by the python script in the mentioned link. I'm going to use that now instead of GUI.
Thnkx
Hans

12

Bug Reports / generating masks defocus area behaves like import from model

« on: March 03, 2024, 07:01:57 PM »

turntable setup;
agisoft pro 'generate masks defocus area' gives as result the total model. Halfway the operation it looks oke and shows only sharp parts of model, but when starting 'relaxation' it ends up with the full model, including unsharp parts.

13

General / Re: close range accuracy settings

« on: March 02, 2024, 10:46:50 AM »

Oke, thanks . Is that with all settings in reference settings?

14

General / table top photos with masks and targets; will targets be used for align?

« on: February 28, 2024, 12:21:30 PM »

on my close range setup I'm using targets for aligning and scaling purposes. I detect markers as first thing to do, so they will be used in first alignment of photos. The photos all have masks, and targets are masked out. Will they still be used for aligning?
Thanks
Hans

15

General / close range accuracy settings

« on: February 27, 2024, 03:45:47 PM »

I've saved my questions, because sometimes I find the answer myselves after a while, but I really can't find the answer :
reference settings; camera accuracy... How much for turntable setup, so close range photogrammetry? how do I get real world accuracy to put in manually? distance camera <> object is 1m, so default accuracy setting of 10m seems a bit much.
Thanks
Hans