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Messages - space111

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1
Hello developer,

Could you please add the following parameters to  Batch processing (export Orthomosaic), including "min zoom level"”max zoom level""tile width""tile height"? they are very much needed when exporting orthomosaic to mbtiles.

thanks.

2
very slow building orthomosaic using network processing (29.7%, 35.6%)

network condition:
Photos and process files are stored on the server(SSD RAID 5, synology) and shared to all nodes(PC) through smb protocol(windows mapped network drive, z:\)
All nodes are connected through 10G network, copying files speed to/from Z:\  >500MB/s

network processing node bat file:
Code: [Select]
C:\"Program Files\Agisoft\Metashape Pro\metashape.exe" --node --host IP  --root Z:\   task detail for build orthomosaic: 
Code: [Select]
surface = DEM, blending mode = Mosaic, refine seamlines = 1, ghosting filter = 0, resolution = 0
When build orthomosaic using network processing , I find that when the progress will stuck at 29.7% or 35.6%, at that time, only one node is running the task, and there is no obvious pressure on network, disk, and CPU on that node. larger area, longer processing time were found. For example, processing of 1 square kilometer aerial image, it will be stuck for 1 hour or more time at this step.

This phenomenon was not found when running locally.

Please help, thanks.

Code: [Select]
Build Orthomosaic (35.6%)
2023-06-07 22:03:27 BuildOrthomosaic.mergePartitionGraph (1/1): surface = DEM, blending mode = Mosaic, refine seamlines = 1, ghosting filter = 0, resolution = 0
2023-06-07 22:03:28 Refining seamlines...
2023-06-07 22:03:28 Merging topology...
2023-06-07 22:06:43 topology merged: Topology:
2023-06-07 22:06:43 n_vertices: 121611
2023-06-07 22:06:43 n_edges: 199175
2023-06-07 22:06:43 RAM size: 0.0361499 GB
2023-06-07 22:06:43 collapsing short edges..
2023-06-07 22:06:47 graph merged in 199.456 sec
2023-06-07 22:06:47 processing finished in 200.408 sec

3
Hi Alexey,

Metashape can distinguish different cameras(same model) based on SN information from EXIF tag in the photo, and read pre-calibrated parameters for post-processing. ;)

However, DJI Phantom 4 RTK has a setting whether to turn on lens distortion correction. when this setting is on, the image will not contain any pre-calibrated parameters.
When import a folder with a mixture of two types of photo, the result of current version of Metashape (1.8.1) is that all photos will be considered without pre-calibrated parameters.

Is it possible to classify these two types of photos and consider they are separate photo groups ? please check "dewarpflag" and "dewarpdata" tag from EXIF tag in the attachment. Due to the size limitation, I am not able to upload raw photo,  let me know if you need raw photo for testing.

Thanks.

4
When importing pictures from different drone but same model (e.g. 2 DJI Phantom 4 RTK),  current Metashape (v1.7.3) considered they are from the same drone, and only showed 1 camera model in "camera calibration" , read precalibrated data from the first image only, which is obviously wrong.

To fix this problem,  you may use BodySerialNumber to distinguish different lenses, Check EXIF parameter of each picture, find the following value:

"Key: Exif.Photo.BodySerialNumber, value 0K8TH1M11234567"

 group pictures with same BodySerialNumber and read each group's precalibrated value.

5
Bug Reports / Re: 1.6.4 DJI Phantom 4 RTK incorrect camera parameter
« on: September 12, 2020, 01:52:59 PM »
Hi Alexey

here's the link that contains a sample image
https://mega.nz/file/QtEVHSYC#82eAcwl-44qylRUxS-84YHOOaE7aT9hmcJ61NX2PPAk

Best regards.

6
Bug Reports / 1.6.4 DJI Phantom 4 RTK incorrect camera parameter
« on: September 04, 2020, 08:12:56 AM »
When load DJI Phantom 4 RTK (FC6310R) image into metashape 1.6.4, the following camera parameters are incorrect :   F, P1, P2

For example :

when open an image through "notepad", camera parameter can be found
   drone-dji:DewarpData=" 2019-08-17;3682.980000000000,3676.280000000000,-9.900000000000,-2.550000000000,-0.263183000000,0.113290000000,0.001035960000,-0.000173821000,-0.041476400000"

The format of these parameters is as follows:
Calibrate_date;fx,fy,cx,cy,k1,k2,p1,p2,k3

"f" should be  (fx+fy)/2 , in current version, f value is incorrect
P1 P2 was correct in version 1.6.2,  however,these  values are reversed in 1.6.4

Thank you.


7
General / libtiff error when importing DJI DNG format files
« on: April 09, 2018, 09:18:15 AM »
Hi All,

I am using DNG format file shot from DJI Phantom 4 pro for 3D construction,  expecting DNG file may bring better results than jpg files.   
however, error appear in "console" when I try to import DNG file.

"libtiff error: input: Null count for "Tag 51008" (type 7, writecount -3, passcount 1)"

also I noticed that DNG image quality shown in photoscan is significantly lower than JPG files.

Anyone facing similar issue?


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