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Topics - jenkinsm

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1
General / Weird banding/noise pattern in mesh from depth maps
« on: October 28, 2022, 02:52:25 AM »
Does anyone know what is causing this weird banding pattern in my mesh? (See attached image)

I generated the mesh from depth maps using a set of 22,785 images that were well-aligned.

I'm wondering if Optimizing Cameras caused this.

It's a big problem because it shows up in my normal maps and looks terrible in-game.

Open to hearing all suggestions. Thanks!


2
General / EXR support in Metashape
« on: April 23, 2022, 07:45:30 AM »
I was able to successfully import EXR files into Metashape, however, the gamma looks incorrect. The image is much brighter than in Mac's Preview and Finder, and also DaVinci Resolve where the EXRs were exported from. It could be a color space flag that needs to be changed in Resolve, but since the image looks right in Finder and Preview, I'm assuming Metashape is the culprit here.

Does anyone know why this is happening? The attached pic shows Metashape on the left and Preview on the right.

3
Bug Reports / Changing color levels produces red/cyan shift
« on: April 18, 2022, 08:50:23 PM »
I am trying to use the "Adjust Color Levels..." tool that you open by right-clicking on an image, but when I change all the values by the same amount (150 in my case) the image becomes dramatically Red. If I reduce below 100, then it shifts toward Cyan.

(See attached image)

Weirdly, the thumbnail shows the correct image, but not the large viewer.

What's going on here?

4
I'm trying to merge two large chunks into one and I thought it would be quick, but I'm surprised to see that it's going through the "Selecting pairs..." process which is taking a long time. Does anyone know why it's doing this? I didn't align the chunks, I'm just trying to merge them.

5
I was wondering about these attributes that affect alignment. I want to make sure I am using all the best settings to get the highest number of aligned images in a single alignment operation, while still being reasonably fast.

1) Focal Length - Will I get a higher number of correctly aligned photos by entering the 35mm focal length (in my case, 16mm) or by leaving it blank so Metashape can estimate it? And how does this affect speed?

2) Capture distance - Same as above - will I get a higher number of correctly aligned photos by entering the capture distance? And how does this affect speed?

3) Rolling shutter compensation - I know this slows down alignment. But does it affect the number of correctly aligned photos? And/or does it affect the quality of the resulting mesh?

Thanks in advance!




6
I am working on several gigantic projects with well over 200,000 TIFF images each. I would like to know if there are any tips or hidden secrets that would allow me to import all of my photos much faster.

The slow importing happens on my Windows machine where the photos are stored on a 32 TB RAID 0 (2 drives), whereas my M1 Max MacBook Pro loads photos from an external SSD almost instantly. Granted, I haven't tried 100k at once on the MacBook, and I know it's faster partly because of the SSD, but I'm still surprised by how long it takes on the PC.

Putting the photos on an SSD is not an option, as each project uses several TB of photos. Converting to PNG or JPEG is not ideal because that's an extra step I don't want to include, and my workflow can only output TIFF/DPX/EXR frames directly (I'm capturing roads on video and using DaVinci Resolve to mask out the sky, adjust the contrast/midtone detail, and mask out the capture vehicle).

Any tips or tricks I should try?

7
Feature Requests / Integrate Object Capture API on Mac OS
« on: February 07, 2022, 10:25:46 PM »
I have been playing around with PhotoCatch for Mac OS and it's able to produce some really impressive models, especially with tricky subjects like cars (lots of reflections, smooth surfaces, etc.)

I'm not super happy with the UV mapping though, it's nowhere near as elegant as Metashape.

Would it be possible to integrate the Object Capture API in such a way that it could be selected as a method of generating a mesh, and then Metashape's normal UV mapping and texture generation would take over for that step? That would be very useful!


8
Face and Body Scanning / iPhone Front Camera = Ideal Face Scanning Device
« on: February 03, 2022, 06:30:19 AM »
For anyone doing face scanning, grab an iPhone and take some Portrait mode pictures in JPEG (not HEIC) with the front camera. Import them into Metashape 1.8 as Laser Scans and you'll have an absolutely perfect face model with very little effort.

Here's a short video clip of a quick test I did, using myself as the subject. I even captured the photos myself!

https://vimeo.com/673018783

9
Feature Requests / Add support for transparency (alpha channel) in images
« on: February 03, 2022, 06:29:15 AM »
Can Metashape be updated to include support for alpha channel transparency in images?

I figured out that I can mask out the sky super quickly in DaVinci Resolve and export 16-bit uncompressed TIFF images with alpha. But Metashape currently interprets the transparent area as solid black and the black ends up as part of the mesh at the end.

I hope this is an easy addition because it will speed up my workflow probably tenfold. Right now, the best solution I've found is to either use a Photoshop action with the Sky Selection tool to make masks as PNG files or use my DaVinci Resolve method and output black-and-white 8-bit TIFF files. The first method produces smaller files but takes a lot longer, while the second method is a lot faster but results in a second set of TIFF images that either waste space or would then have to be converted to PNG or JPEG.

Including support for transparency would mean I could do everything in one pass in Resolve: split my video into frames, flatten the contrast while increasing the midtone detail, AND mask out the sky/other unwanted parts of the image (such as the capture car).

10
General / Can Metashape support transparency (alpha channel) in images?
« on: February 02, 2022, 08:51:17 AM »
This is maybe a question for the developers more than anyone else. Can Metashape be updated to include support for alpha channel transparency in images?

I figured out that I can mask out the sky super quickly in DaVinci Resolve and export 16-bit uncompressed TIFF images with alpha. But Metashape currently interprets the transparent area as solid black and the black ends up as part of the mesh at the end.

I'd hope this is an easy addition because it will speed up my workflow probably tenfold. Right now, the best solution I've found is to either use a Photoshop action with the Sky Selection tool to make masks as PNG files or use my DaVinci Resolve method and output black-and-white 8-bit TIFF files. The first method produces smaller files but takes a lot longer, while the second method is a lot faster but results in a second set of TIFF images that either waste space or would then have to be converted to PNG or JPEG.

Including support for transparency would mean I could do everything in one pass in Resolve: split my video into frames, flatten the contrast while increasing the midtone detail, AND mask out the sky/other unwanted parts of the image (such as the capture car).


11
General / How does Metashape decide which cameras to use for texturing?
« on: January 31, 2022, 01:03:20 PM »
I found this note from Alexey in an old post from 2013 and I was wondering is anyone has more information about how Metashape chooses which camera to use for texturing:


"For texturing PhotoScan uses cameras that are looking in the direction parallel to the surface normal in the area being textured."

My question is: What happens if two (or more) cameras are looking in the direction parallel to the surface normal?

In my case, I captured a road using an iPhone (this is the high quality dataset) and a 360 GoPro (reference dataset for GPS and image alignment)

I wasn't expecting to use the 360 photos for mesh and texture generation, but it turns out that the 360 cam contributes to the tree meshes in areas that were out of frame on the iPhone, so I'd like to use them.

So what I need to k ow is how to create the textures in such a way that the road and surroundings are textured from the iPhone images, while the treetops are textured from the GoPro.

My assumption is that I will have to mask out the bottom half of the GoPro images, but I would love to hear any insights into how Metashape handles thus.

12
I thought I fixed this error but now it's back again and I don't know what is causing it. I input about 25 GCPs and when I go to Optimize, I get this error.

Any help is appreciated!

13
Bug Reports / Video import not working (tried 1.7 PC and 1.8 Mac)
« on: November 12, 2021, 10:12:21 PM »
I tried to import a video in various formats but nothing worked. I used both 1.7.1 on a PC and 1.8 on a Mac. The PC gave an error and the Mac did nothing after proceeding from the video import dialog box.

What are the exact codec specifications that Metashape will accept? The manual talks about the container only (mpy, mov, etc.) but does not mention the codec requirements or limitations.

Also, does it have a resolution limit? These are 4K videos shot on an iPhone.

14
General / Trouble with Textures
« on: October 25, 2021, 11:37:48 PM »
I'm having trouble with textures. In some areas where the shaded model looks perfect (LEFT), the textures (RIGHT) are all messed up.

Am I doing something wrong? I'm generating the textures from the images. Should I use the dense cloud instead?


15
Hi all,

I'm doing some experimentation with the pro version demo and I was curious if anyone has done something similar? Would be great to learn what works and doesn't from someone more experienced.

I'm testing out a process for making tracks for a driving simulator (Assetto Corsa) using a combination of Google Street View 360 panoramas and aerial shots exported from Google Earth Studio.

The best street view images are 133MP so there's a lot of data to work with, but the downside is that the photos are captured kinda far apart, so I am using the aerial images to sorta "fill in the gaps" and also to capture the surrounding area that is not viewable from the road.

It's actually working very well, and I'm starting to tinker with different texture settings so I have as much detail on the road as possible.

One thing I'm struggling with that I'd love advice on:

When a photo doesn't align automatically, I can't seem to do anything to force it to align. Sometimes a whole group of photos won't align, even though it seems like they should, and I don't know what to do with them at that point.

All of the images have GPS coordinates and altitude in the EXIF. The street view panos also have yaw data. I set the coordinates to match Google Earth (WGS 84 + EGM96 height), and everything shows up on the map in the exact right location, so can I use this to help guide the software to align certain photos? If so, how?

Thanks in advance for your help!

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