Topics

16

Python and Java API / Help in localframe explain

« on: November 22, 2019, 06:48:04 AM »

Hi everyone,

Could anyone give some hints about the chunk.crs.localframe() matrix?

Hello claranine,

Code: [Select]

sourceGeogr = camera.reference.location #source values in geographic coordinate system
estGeogr = chunk.crs.project(chunk.transform.matrix.mulp(camera.center)) #estimated position in geographic coordinate system

sourceGeoc = chunk.crs.unproject(camera.reference.location) #measured values in geocentric coordinates
estimGeoc = chunk.transform.matrix.mulp(camera.center) #estimated coordinates in geocentric coordinates
local = chunk.crs.localframe(chunk.transform.matrix.mulp(camera.center)) #local LSE coordinates
error = local.mulv(estim - source)


As in this post why the error needs to use local.mulv to transform rather than directly use (estim - source)? Is this due to unit difference?

Thanks in advance!

17

Bug Reports / Image quality estimation not right for special blurry case

« on: November 19, 2019, 04:20:18 AM »

Hi Alexey,

I had one example of image with "blurry" due to out of focus, but the image quality estimator still gives me 0.76 image quality which says it is good. Is there any function to detect this kind of blurry?

Thanks a lot!
 

18

General / Is it possible to remove mask after imported it?

« on: July 19, 2019, 05:22:37 AM »

Hi friends,

Is there a button to remove imported mask? I haven't found it... Could anyone help? Or it can only be replaced by new mask file?


Thanks!

19

Python and Java API / Python script modify camera Yaw Pitch angles

« on: November 26, 2018, 10:19:16 AM »

Dear Support,

I had some searches in the forum but haven't found similar answers, so I post this new topic here.

What I want to achieve is, when I loaded the photos with orientation angles, is it possible to use python script to modify the angles rather than load a modified geotag file separately from GUI? For example an image Y/P/R is 17.2 / 0.5/0, and I want to change it from python to 180/89.5/0, is it possible to do from python api?

Thanks a lot!

20

Python and Java API / questions for marker.position and filter/classifications

« on: October 12, 2018, 08:59:23 AM »

Dear Alexey,

May I know what's the unit of marker.position? I searched some threads and know it's in camera plane, is it what is used for (X, Y, Z) - point coordinates in the local camera coordinate system? For a pixel in the camera, could you give an example on how it gets the position values? Also the u/v in camera calibration value would it be expected as millions or few handreds if it's pixels?

My another question is about the classification function, the angle/distance settings are clear, but could you offer some articles on how they are working? Cause sometimes I filter a conveyor and it removes the other points for different densities. Also if the automatic classification can add other classes other than ground?

Thanks a lot!

21

Python and Java API / select cameras by time

« on: August 16, 2018, 07:11:37 AM »

Hi Alexey,

Could you help me with sort camera by time in the python api? I tried

chunk = PhotoScan.app.document.chunk
cameras = chunk.cameras
cam_num = len(cameras)
chunk_N = 0
for i in range(0,cam_num-1,1):
    timestamp = time.mktime(time.strptime(cameras.photo.meta['Exif/DateTime'], '%Y:%m:%d %H:%M:%S'))
    timestamp_next = time.mktime(time.strptime(cameras[i+1].photo.meta['Exif/DateTime'], '%Y:%m:%d %H:%M:%S'))
    if (timestamp_next - timestamp) <= 60:
        cameras.selected = True
        cameras[i+1].selected = True
    else:
        cameras[i+1].selected = False
        break

But it is always not select the cameras, and sometimes select wrong cameras depending on the camera names. I am assuming it needs to sort by time first, however getting a list of camera time does not store the camera id correspondingly.

Thanks a lot for your help,

Kind regards,

22

General / Adaptive Camera Model Fitting which step

« on: April 11, 2018, 03:49:29 AM »

Hi Alexey,

In v1.4, the Adaptive camera model fitting option appears in both "Align Photos" and in "optimise cameras". Is there any difference? As in some threads it is mentioned rolling shutter should be in the sensor so it was moved out from optimising options, but what is the "Adaptive camera model" fitting option does now?

Thanks for your explanations and support!

Regards,

23

General / Camera FC6310 model problem

« on: April 05, 2018, 02:55:43 AM »

Hi Alexey,

I got a flight with photo ratio 16:9, with camera model FC6310. I found Agisoft has some weirdness to add GCP for this kind of photos, each GCP left as checkpoint will have very large RMS, while involved it in the RMS will be very small. However the checkpoints on the site will be still off.

Is there any bug or special settings needed for this kind of photos?

Thanks

24

General / Multiple F/stop and shutter settings with large GCP RMS

« on: February 24, 2018, 05:06:27 PM »

Hi Alexey,

I have had a project with multiple flights due to the area is large, also the F/stop and shutter speed have some changes during the flights. However, the aligned photos have large discrepancy when marked with GCPs and reoptimised. The RMS of the GCPs are always at 0.2m to 1m in Agisoft. Is it related with the F/stop? What I notice is Agisoft treat the cameras into different groups in the camera calibration, is there any suggestions to get a smaller RMS with GCPs?

Another issue I found it once I ticked " with rolling shutter" it will bring about 50m RMS for cameras, do you have any suggestions?

Thank you so much!

25

Bug Reports / GCP unchecked but will impact in camera reoptimising

« on: January 29, 2018, 09:31:59 AM »

Hi Alexey,

I just tried to uncheck the GCPs to leave it as a checkpoint, but it seems the reoptimising will involve the "unchecked" GCPs in the camera model still. Would this be correct?

Could you tell me a bit about the formula used to reconstruct the GCPs with the camera alignment? As the unchecked GCPs how would it be weighted in the formula?

Thank you very much, any comments would be much appreciated!

Cheers,

26

Bug Reports / Canadian NAD83 (CSRS) definition issue

« on: September 20, 2017, 07:50:42 AM »

Hi Alexey,

When I looked at the projection in Agisoft e.g. EPSG:3780 based on NAD83(CSRS), it has the part of "TOWGS84[-0.991,1.9072,0.5129,0.025789907519493,0.009650098960270401,0.011659943232342,0]", while in https://epsg.io/3780 it shows "TOWGS84[0,0,0,0,0,0,0]".

This caused the conversion difference between using Agisoft and other software. Can you tell me which one should be the correct one? Where does the values in Agisoft's definition for towgs84 come from?

Thanks a lot!

Phogi

27

General / Rolling shutter option detail

« on: September 04, 2017, 08:15:33 AM »

Hi Alexey,

Thanks for the rolling shutter option in camera optimising, in some of my datasets it shows smaller RMS for cameras if chosen. However, I found it is also leading smaller RMS for P4p photos, does it look right? Is there any detail of when it should be used in the website of the rolling shutter option?

Thanks a lot!

Cheers,

28

Bug Reports / NAD83(2011) can't directly convert to WGS84 / UTM zone

« on: July 28, 2017, 02:56:10 AM »

Hi Alexey,

Is it because EPSG code defines differently so NAD83(2011) datasets have to be defined on NAD83(2011) and can't convert directly to WGS84 / UTM?

Thanks,

29

Bug Reports / Agisoft Local outputs do not write metadata correctly

« on: July 25, 2017, 07:38:36 AM »

Hi Alexey,

I recently working on the Agisoft's "Local Coordinate Systems" to generate DEM/Ortho/Laz etc., however, no matter which projection I selected (Local ft/m/ftUS), the outputs will not contain the unit in the header, but only leaves "Coordinate System is "" ".

Is this a bug when Agisoft exports local Coordinate System results? If so will it be fixed in the next release or if it will not be fixed in the next few rounds?

Thanks a lot, I'm looking forward to your reply.

Cheers,

30

General / Agisoft model distance question

« on: July 17, 2017, 10:35:20 AM »

Hi Alexey,

When Agisoft import GCPs, is it important that the GCPs are in grid coordinates or ground coordinates?

Thanks,