xmp work flow

Development Asset Creation
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1

Hi.
I have a sequence of images shot from eight cameras.
I’m aligning the first frame of the eight cameras and writing out xmp files.
I then try and use them to align the next frame of eight cameras in the sequence.(copy and rename the xmp to match the next frames name then import the frames for each camrea)

However the models are not aligned. The cameras are locked off and the subject movers very little. Is the small amount of cameras problem?

I’m just using the default values on the xmp export

Cheers

2

Hi
do you export the XMPs as LOCKED ?
Can you please make a screenshot of the alignment settings ?

3

Yep the xmp were set to locked.

<x:xmpmeta xmlns:x=“adobe:ns:meta/”>
<rdf:RDF xmlns:rdf=“http://www.w3.org/1999/02/22-rdf-syntax-ns#”>
<rdf:Description xcr:Version=“2” xcr:PosePrior=“locked” xcr:ComponentId=“{15A4A871-B8B5-49E5-98F7-1559DEF227E8}”
xcr:DistortionModel=“brown3” xcr:FocalLength35mm=“183.296315155977”
xcr:Skew=“0” xcr:AspectRatio=“1” xcr:PrincipalPointU=“-0.0850303512676189”
xcr:PrincipalPointV=“-0.267977865484245” xcr:CalibrationPrior=“locked”
xmlns:xcr=“http://www.capturingreality.com/ns/xcr/1.1#”>
<xcr:Rotation>0.999497475841951 -0.0277818059257055 0.0152632580098681 0.0113234580514602 -0.136815279788865 -0.990531856385271 0.0296070107124342 0.990206923059923 -0.136431940691587</xcr:Rotation>
<xcr:Position>-13.3182704887445 -258.497816136588 75.5024908753281</xcr:Position>
<xcr:DistortionCoeficients>-0.216207956360574 16.2277259847067 -336.891638183007 0 0 0</xcr:DistortionCoeficients>
</rdf:Description>
</rdf:RDF>
</x:xmpmeta>

misAligment.PNG

4

Hi
the XMPs showed here will not help us pinpoint the problem. As I have pointed out, please post a screenshot of the alignment settings. Is it possible to send me the first dataset, where you set the XMPs as the reference, and the secondary dataset to test it on ?

5

Hi.

I did another test. I bought in a single image from each of my eight cameras aligned them and did a reconstruction and exported a OBJ.
I then exported the xmp’s. I did a new scene and bought in the same eight images, aligned them this time that was super fast as it’s using the xmp’s. I exported this OBJ.
These OBJ’s do not align!

Any help would be great!

Here is the alignment screen shot.

6

Hi Clutterbuck

Is it possible to send me the first dataset, where you set the XMPs as the reference, and the secondary dataset to test it on ?

7

Hi.

I’m afraid I cant send you the data set. Is there anything you can suggest to help?

Cheers

8

I appreciate it’s hard to debug without my specific data set but I really need some help getting the xmp workflow working.

Any pointers would be great.

Cheers

9

]Hi.

I have mocked up my problem with a data set I can send you. I can send you the eight images the xmp files and the two meshes.

So I align the images build a mesh and save the xmp’s Then make a new scene align the images (quick as it sees the xmp) and build a mesh.

Here is a screen shot of the two meshes.

Capture_latest.PNG

10

where shall I post the data set?

Cheers

11

Here is a snap shot of the cams in Maya from two FBX exports from the same xmp’s.
I would think for each camera they should be in the same place. I’m sure I’m just doing something stupid just can’t figure out what.

Cheers

Capture_cams.PNG

12

Hi
send me the link with proper naming to the email in my signature.

13

For anyone else that finds this post. I can only speculate to the solution to 's issue but I had similar a problem with the XMP workflow and processing sequenced data. The solution I found was to make sure you set “Export transformation settings/Coordinate system” to “Project output” in the Mesh (*Export) dialogue…

This way all your exported meshes will have the same position, orientation and scale.