Topics

1

General / Radiometric (thermal) Orthomosaics - Photoscan vs Pix4D

« on: March 13, 2018, 06:17:18 AM »

Hello,

I'm interested in producing radiometric orthomosaics and have been experimenting with a public data set (https://www.rmus.com/pages/data-set-examples).

 I have run the data set with Pix4d (using its thermal template) and PhotoScan. Unfortunately Pix4d beats PhotoScan...
Results are attached.

This dataset consists of radiometric geotagged tifs, taken from the Zenmuse XT 640 x 512 resolution, 30 hz, 9mm lens thermal camera.

I'm wondering whether any one has any advice on how to produce better orthos using PhotoScan.
My steps for PhotoScan are pretty standard:
Align Photos
Build Dense cloud using Spare cloud
Build mesh using dense cloud and height field
Build ortho using mesh
Export ortho

The 9mm lens obviously causes a fisheye distortion on the images - i'm thinking about correcting this and then re-trying photoscan.
For some reason when I upload my images, then go Tools>Camera Calibration and change the camera type to Fisheye - no images ever align...

Any other advice would be greatly appreciated!!

Cheers

2

Python and Java API / Enabling GPUs through Python API

« on: March 05, 2018, 07:11:00 AM »

Hello,

I'm am trying to enable my GPU for photoscan's computations.
The reason I'm writing here is because I suspect its not working properly, evident by watching my computer's Task Manager process levels. 

When enabling the GPU device through the GUI (Tools>Preference>GPU), my computer is hitting GPU percentages of 10-20% for photoscan.

When enabling through the python script and running photoscan, my computer hits 5% once and then remains at 0% for most of the time.

My question is: how do you enable the GPUs through the python API?

As far as I can tell, its just by setting:

Code: [Select]

PhotoScan.app.gpu_mask = 1

Is there anything else you have to do?

My setup includes:
PhotoScan version 1.4.1
GPU: GeForce GTX 1070
OpenGL version: 4.5.0 NVIDIA 384.94
CPU: Intel i7 at 2.8GHz
RAM: 32GB
OS: windows 10

Cheers,
Alex

3

Python and Java API / Writing console log to text file

« on: March 05, 2018, 03:44:46 AM »

Hi there,

I'm trying to write the PhotoScan console log text to a local text file.
I'm finding rather strange results.

For example, I can easily do this using the python console in the GUI.
I do this by:

Code: [Select]

console_obj = PhotoScan.app.ConsolePane()
contents = console_obj.contents

# save contents  variable to text file etc...


This works when typing in the python console - the variable contents is a string with the console text.

However, when I try this from running PhotoScan via the command line and calling my python script, the contents variable is always empty...

Anyone else found this? Any advice?

I'm using version 1.4.1

Cheers,
Alex