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Messages - jessica_tay

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General / Re: Is it possible to build a before and after DEM?
« on: July 31, 2017, 04:29:13 PM »
The points appear to be floating because is it still belonging to the projections of the before photo (top photo).

Is there a way to export the position of the markers and add it to another chunk? (i added it to the chunk that is below but this problem occurred).


General / Re: Is it possible to build a before and after DEM?
« on: July 31, 2017, 01:00:11 PM »
Hello SAV,

Thank you for the reply.

I have another question. I have a before flowering photos and I have markers on it. And I build a DEM out of it.

Then I export the markers and import it to the after photos, but the markers are 'floating'. Do you have any idea why and how do I solve this? I thought that by during the same GCP, i will be able to build an after DEM to see the growth. I've attached some images.

or is there other methods that I can do this?

Thanks for you help!


General / Is it possible to build a before and after DEM?
« on: July 27, 2017, 07:39:45 PM »

i have taken images of a site before and after the flowering season. And have aligned the photos in separate chunks.

I will probably be using the same GCP for both chunks.

Is it possible to build a DEM for the before and after flowering and is it accurate to see the height of the flowering plants?



General / is there a way to export exif file?
« on: July 26, 2017, 07:04:44 PM »

I have a series of images taken with a drone in tiff format. and i have a separate txt file containing the longitude, latitude and altitude of each image. is there a way to export a exif file from Photoscan?

I tried the export exif button on the reference tab but it said GPS meta data not found.

Does anyone have a suggestion on how to add gps information to the images? i also have the images in raw format.

Thank you!


General / colour difference after exporting
« on: June 26, 2017, 04:14:04 PM »
Hello all,

i build an orthomosaic with photos taken with an infrared camera and vegetation were supposed to appear red. IƤve attached the screenshot of the orthomosaic as seen in Photoscan.

However, when i exported it as tiff to be analyzed in Arcgis, the colour changes.

Anyone has any experience with exported images to Arcgis and can explain why is there a colour difference? i am not sure if the difference in colour will affect my analysis when I use the different spectral band information for calculating vegetation index.


General / resolutions of Orthomosaic
« on: May 29, 2017, 10:43:50 AM »
Hello to everyone!

I realised that one can set the resolution of the orthomosaic, but if it was left alone, Photoscan will just assign its own resolution.
My question is, does it really become higher resolution if we set it manually? or is there a limit or threshold as to how high res the image can go? If that is the case, the default resolution size set by PS should be the highest resolution?

Thanks! Any explanation is appreciated.


General / Re: Orthomosaic from RGB and NIR images
« on: May 24, 2017, 02:35:58 PM »
Hello Alexey,

Thank you for the reply!

Is there a tutorial for multispectral camera approach that I can look at?


General / Re: Orthomosaic from RGB and NIR images
« on: May 24, 2017, 12:11:30 PM »
Hey all,

I also have a RGB image and 2 NIR image. All three were shot at the same place and have the same geotagged locations.

I aligned all three set of images separately in different chunks and am I am trying to see if it is possible to align the chunks together on top of each other. The first time I tried it, i aligned the chunks with point cloud reference, but it took 27 hours to complete.

However, only the RGB chunk aligned with one of the NIR chunk.

I know that it would be easily to export the orthomosaic of each chunk separately then analysis it further in GIS, but I was wondering if it was already possible to align the layers in PhotoScan itself.



General / Re: accuracy of digital surface model
« on: May 23, 2017, 05:35:16 PM »
Hello Jeremiah_ROWE,

Thank you for the reply.

But I did not understand why do you mean by referencing the model to the geotagged location.

you mean when you are aligning the photos? you selected by references and not generic?

And by mean of check shots.. what do those shots contain and what values are you comparing?

Thanks for replying.


General / Re: Panorama 360
« on: May 23, 2017, 03:04:22 PM »
Anyway, the panorama looks fuzzy at the bottom.
Is there anyway to solve it?

General / accuracy of digital surface model
« on: May 23, 2017, 01:10:55 PM »
Hello all,

is it possible to check how accurate the digital surface model is? (is it in the 'generate report?')

And does having more ground control points helps to improve the accuracy or is there a threshold number where it doesn't improve it further.

Thank you!!


General / Re: Panorama 360
« on: May 23, 2017, 01:07:38 PM »
Hello Alexey,

I finally understood what does it mean by aligning the coordinates.



General / Re: Panorama 360
« on: May 23, 2017, 12:31:02 PM »
Hello Alexey,

I did follow the tutorial but the images were still that way.

I will try again then.



General / Re: combining infrared and rgb camera
« on: May 22, 2017, 06:24:51 PM »
great, i am also interested in this topic.

I am also trying to combine my RGB chunk with my NIR chunk.

I've so far build the spare cloud for both chunk separately and then I merge the chunk according to the points.. it is still processing and I'll update if it works.

I hope to hear from you guys who are trying as well.


General / Panorama 360
« on: May 22, 2017, 06:18:26 PM »

Recently I started a project taking spherical panorama with the drone. I combined the photos in Agisoft and it come out perfectly but it is a little warped.

I was wondering if Agisoft is able to produce a 360 panorama where I have the option to pan around?


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