Messages

16

General / Re: Is it possible to modify the texture by "unrendering"?

« on: July 14, 2019, 04:48:58 AM »

It is possible to project an image (your rendering) onto a 3D model. Except, in general the rendered image does not contain enough texture information, so when projected onto the model there will be parts untextured ... specifically those not visible from the rendering camera position.

17

Texture De-Lighter / Test3

« on: July 11, 2019, 02:01:37 PM »

Another test, files here
    http://paulbourke.net/transient/delight2/
Or just check out the summary pdf.
Any comments on the addition of blue tint to the shadow regions?
Note, the result in MetaShapePro was unsuccessful.

18

Texture De-Lighter / Re: Test2

« on: July 10, 2019, 08:56:24 AM »

Will do. While the model was made with MetaShape, I was just using the OBJ files.

19

Texture De-Lighter / Test2

« on: July 08, 2019, 05:03:43 PM »

See another example here
    http://paulbourke.net/transient/delight/

There is some chromatic defects being introduced. Is this because it is only working in 8 bit despite my textures being 16 bit with a matching dynamic range.

"original" is the model from Metashape.
"masks" are the marks showing shadow and non shadow
"deshadow" is the output from delighter
"cameralight", "relight1", "relight2" and some random relightings

Sorry I need to link to these and not attach, but the file size limitations are too low to attach images that effectively represent the images.

20

Face and Body Scanning / Re: Scanning human bodies

« on: July 08, 2019, 01:16:02 PM »

My apologies
    http://paulbourke.net/reconstruction/humanscan/

21

Feature Requests / Forum suggestion

« on: July 08, 2019, 12:51:47 PM »

Can I suggest the file upload limit be increased for these forums.
Also, I reported this before ... if one tries to upload something too big one gets a message like "Error: attachment greater than  768KB" (I think that's the number). So one decreases it under 768K and try again, only to then be told "Error: attachment greater than 500K".
1MB seems much more reasonable for decent images illustrating points being made.

22

Texture De-Lighter / Test1

« on: July 08, 2019, 08:45:30 AM »

First example, interesting.
But just realise it is also a multiple light source case.

Suggestion: Really need an undo option when drawing the shadow or non-shadow areas, easy to get it wrong and currently seems one needs to paint over top with opposite state or start again.

Should one paint minimally (as this example) or cover more of the area?

23

Texture De-Lighter / Multiple shadows

« on: July 08, 2019, 07:46:11 AM »

Can't wait to try this out. Shadows are a fact or life in much of the field work I do in remote parts of the world. Any chance of working on models illuminated by multiple lights, in this case 3 dominant ceiling lights?

24

General / Re: Best practice tiny objects

« on: July 07, 2019, 04:40:21 PM »

My current project just completed
    http://paulbourke.net/reconstruction/macro3d/

25

General / Macro 3D reconstruction

« on: July 07, 2019, 03:39:32 PM »

I asked a few questions around this project, so have documented it here for those interested.
    http://paulbourke.net/reconstruction/macro3d/
Objects from 4mm to 20mm, without focus stacking.

26

General / Aligning chunks

« on: June 04, 2019, 06:25:18 AM »

A question about aligning chunks.
I'm scanning lots of objects in halves, top and bottom. Generally I do both halves all the way through to textured meshes, identify markers in each, align and merge ... all good.
But I'm curious what the align option by point is for. Doesn't ever seem to do anything, what circumstances is it for?

27

General / Re: too many pictures

« on: June 04, 2019, 06:13:25 AM »

Easy enough to do outside MetaShape, assuming your photos are evenly distributed and have a unique continuous counting id ... for every second image simple make a new directory and
     cp *.0 *.2 *.4 *.6 *.8 ../newdir
Or the equivalent for your file numbering scheme and OS.

28

General / Crazy textures

« on: June 04, 2019, 06:09:02 AM »

MetaShape often/usually creates "messy" textures maps, made up of lots of different pieces, and clearly quite inefficient use of the image area. Is there a way within MetaShape to reorganise the UV coordinates (and hence the texture map) into something more continuous? If not within MetaShape, what is a (simple) external tool for this?

29

General / Re: Unexpected results

« on: June 04, 2019, 06:05:51 AM »

When I set point alignment accuracy to "highest" then all seems fine, except for the time it takes. :-)

30

General / Masks

« on: June 04, 2019, 06:04:47 AM »

When using masks what are some examples of when one should apply masks to key points or tie points?