Messages

1

General / Re: Metashape chooses blurred patches for orthomosaics

« on: December 06, 2025, 01:43:29 AM »

Hello NMS,

Metashape takes into account several criteria when choosing optimal images for orthomosaic. Those include distance from camera to the area of interest, effective image resolution for the area of interest, how close is camera normal to the normal to surface in the area of interest and some others.

If you have some blurry and out-of-focus areas on the source images, you can try to generate masks for them in automatic mode using Generate Masks command, from Model method and with "mask defocus areas" option enabled. After that re-build the orthomosaic confirming that unwanted areas are properly masked.

I've had the same issue as the OP, I probably first observed it 3 years ago and posted about it. The solution was manually patching.

But what I noticed is often I would patch and the top ranked image would be a much better one. So I believe there's a bug. The program knows a sharper image is best, but doesn't choose it the first time.

I don't know how it works but it seems like it should be simple for the software to prioritize nadir images when generating an orthomosaic, and more difficult for software to evaluate sharpness. But really I think this is just a bug not a flaw in how the program works

2

Camera Calibration / Re: Rolling shutter

« on: June 27, 2025, 11:16:18 PM »

Thanks Paulo, that's what I was thinking but wasn't sure if that's what all those different numbers for each picture meant!


I've been shooting a few static photos with each set, and moving them into their own group and turning off rolling shutter compensation. Is that a good practice? Presumably the software should recognize that they aren't rolling right? But is it still better to explicitly mark them as not needing any compensation?

3

Camera Calibration / Re: DJI M3E RTK - Camera calibration and dewarp

« on: June 27, 2025, 08:44:36 PM »

If you shoot raw photos with the Mavic, you can edit in a program like Lightroom and disable the de-warp, but apply vignette correction

4

Camera Calibration / Re: Rolling shutter

« on: June 27, 2025, 08:39:57 PM »

Any news regarding this?

https://www.agisoft.com/forum/index.php?topic=14671.msg64383#msg64383

Regularized model is suitable for the case when the drone flies without turning the camera, i.e. during the shooting to a new route, the camera does not turn and the drone moves in parallel.
When using a Regularized, only two parameters are optimized for each frame: axis shift XY in the plane of the photo. When using the Full model, 6 parameters are optimized for each frame: shift along the XYZ axes and rotation along the XYZ axes.

I've been trying to figure out if the compensation parameters are adjusted individually per photo or just averaged for all photos. From the language in this post, it appears that they are adjusted on a per-photo basis. But I've seen other statements that say the opposite.

I ask because I fly manually. I never take any pictures with the drone rotating, always moving forward, or sometimes drifting to the side due to wind. The drone speed can vary due to wind as well. If each photo is assessed by the software independently, that's good. But if not, would that mean I need to create a "group" for each photo?

5

General / Re: Hawaiian state plane coodinate conversion issue

« on: November 12, 2024, 01:47:21 AM »

I do photogrammetry in Hawai'i and gave up on using PA11 stateplane. Instead I convert GCPs to WGS84 and do everything in that coordinate system. You can always convert the orthomosaic to PA11

6

Feature Requests / Re: Add Vertex to polyon without altering existing boundaries

« on: November 12, 2024, 01:40:13 AM »

Thanks JMR, I was trying to find a workaround by clipping or something, but didn't think of that!

I guess if people find the existing method useful, there could be an additional "add vertex along edge" and the existing tool can be left alone

7

General / Re: Issue processing rtk corrected imagery and GCPs

« on: November 02, 2024, 10:17:08 AM »

Use the icon that looks like a recycling symbol to refresh the GCPs. Then use the star icon to realign your photos. Check all the boxes.


The program doesn't know which is more accurate except by the weighting. That's where you set the accuracy. Default for GCPs is 0.001 meters and default for photos is 0.1 meters I think. You can adjust those and it will change how much each gets weighted. I try to set those to the rough accuracy of each. In my case I set photos 100 meters and GCPs to 0.1 meters

8

Feature Requests / Add Vertex to polyon without altering existing boundaries

« on: November 02, 2024, 06:58:59 AM »

I export my orthomosaics and open them in ArcGIS Pro so I can upload them to ArcGIS Online. The tile format in AGOL uses JPEG compression for rectangular areas, but if there's any transparency it has to be PNG. That means an edge that isn't vertical/horizontal creates a lot of PNG tiles.

Because of this, I usually use the rectangle tool to draw my boundary. But I often have to trim a corner or two from my orthomosaic. The problem is when you add a vertex, the vertex goes where your cursor is. No matter what, it won't be exactly aligned with the line, so the existing line becomes angled slightly. The pictures below show an exaggerated example.

I am requesting that the Add Vertex tool NOT add the vertex where the cursor, but instead adds it to the location along the edge that is closest to the cursor, so that the original boundaries are maintained perfectly.  This is what happens in ArcMap and ArcGIS Pro when you add a vertex so it would be consistent with GIS software.

Thanks!

9

General / Re: Set resolution of DEM

« on: February 01, 2024, 08:33:04 PM »

The ability to set DEM resolution used to exist even with point cloud in 2022, or I could be misremembering.

I discovered that if you set it to generate from the depth maps, you can choose your resolution. And then your orthomosaic will be 2x the DEM resolution.

10

General / Re: Hardware: better choice for Metashape

« on: January 11, 2024, 11:47:23 AM »

You really need Nvidia graphics. Look into gaming laptops, particularly Alienware. I have an Asus ROG Swift  and don't recommend them because of the terrible Armoury Crate software.  Lenovo is pretty low quality, being a Chines brand, and they all have really garbage screens. It helps having a screen with good color and high resolution. I've had several Alienwares and they've all been great

11

General / Re: How can markers be off target on orthomosaic if errors values are good ?!

« on: December 14, 2023, 09:32:56 AM »

Is it possible the GPS coordinates are less accurate than you think? Also did you try loading the orthomosaic and GCPs into GIS software?

12

General / Re: Strange test results on different GPU

« on: October 19, 2023, 10:44:17 AM »

I recently got an RTX 4060 which is a pretty low end card, but does very well in floating point benchmarks because it has the new CUDA cores that can do both. It seems to do very well with Metashape though I haven't done a direct comparison with my older 2080 Ti card. Anybody know if Metashape is mostly floating point or integer math? I would think FP...

13

Bug Reports / Re: Issues with dragging and rotating the model with the mouse

« on: September 10, 2023, 09:18:47 PM »

I'm having trouble finding where the Terrain mode is. In fact, every time I reinstall Metashape I have trouble finding it. Can it please be moved to the Navigation tab? That's where you would expect a navigation setting to be.

14

General / Re: AMD Ryzen 9 7950X3D vs Intel Core i9-13900K ?

« on: July 12, 2023, 05:38:46 AM »

All of my CPUs were always undervolted and I never had problems with calculation errors even during  several hours of computing.

It is several times higher probabilty of errors in the system RAM modules affected with cosmic and electromagnetic radiation after several hours if modules don't have ECC correction. In that case money saved on CPU cooling can be used to buy RAM modules with ECC correction, like server computers have. Ryzen CPUs support this feature.

In case of exaggerated concerns and be 1000% sure, you can always leave a slightly higher voltage value than it is necessary for the proper operation of the processor. But it is still huge difference and big save in energy and heat compared to what we get from the factory with default settings. Manufacturers are keeping huge reserve because there is no time to test all chips to exact voltage needs.

Chips used in smartphones have much much less reserves in voltages compared to desktop CPUs, and are working several days without errors.

You need to test! Period. You can't just say "Well I haven't had problems". You may not know if you've had problems, and you don't know if someone else will experience calculation errors. It's simply not true that cosmic ray RAM errors are more likely. The whole point of needing a certain voltage is that under that voltage you get calculation errors. You're basically telling someone a falsehood, that if the computer isn't freezing, there are no errors.

https://www.researchgate.net/figure/Number-of-faults-in-regard-to-overclocking-and-undervolting-for-matrix-with-size-of-10K_fig4_343556325

15

General / Re: AMD Ryzen 9 7950X3D vs Intel Core i9-13900K ?

« on: July 11, 2023, 10:49:40 AM »

Undervolting is safe procedure, because it is about to find the lowest voltage which is not causing freezing and not the first one which causes issues. It is also adviced keep 0.02V reserve after finding the right voltage value.

Using ECO mode only helps to decrease power consumption and temperatures, but it also masivelly decrease performance because it is not based on undervolting principles.
https://youtu.be/RlMq1VEWNIM?t=84   that cinenebch is good representation how multicore performance dropped after eco mode enable.

What is even better is lock multicore frequencies to certain fixed value, e.g. 4.4/4.6/4.8GHz and do not use automatic boost single core frequencies...this makes undervolting much easier and more effective.

Finding the lowest voltage for CPU is much easier in ryzen master app then adjusting values in BIOS and restarting computer after each change. So it is 100% worth to do, otherwise we are significantly overpaying the performance. With undervolting we can also save money because much expensive water cooling solutions is not needed.

Not freezing doesn't mean there aren't calculation errors. You would need to do real stability testing that looks for calculation errors, and you would have to do it outside the OS you're actually using