Topics

1

General / Reclassify Objects by Bordering Class

« on: July 21, 2018, 06:47:01 PM »

Hi all,

Apologies if there is already a question on this, but I cannot seem to find one.

I have two classes of objects. I would like to reclassify individual objects of ClassA to Class B, if the ClassA objects are surrounded on 4 sides by objects of ClassB. So basically, filling in gaps of stand-alone ClassA objects.

I have been trying a few different things - in particular relative border ClassB ... however I cannot seem to get ideal results. The units as well for these things have no descriptions in most cases so its just been a bunch of random trial and error. 

Can anyone recommend the proper approach? Much appreciated,

Alex.

2

General / Exported One-Band Orthophotos

« on: July 23, 2015, 06:53:22 AM »

Hello everyone!

Basically I used a 5-band sensor to acquire UAV imagery. The raw data comes out with each band as a separate image file. Since I can't mass stack these frame by frame (slight offset in bands) I decided to process 5 orthophotos and align them afterwards to deal with offset. (Incase you are wondering I used the micasense multispectral camera).

So, I did just that... however the single band imagery when mosaicked and exported as an ortho comes out as two band (gray and alpha).

Is there a way to make sure it stays one band for export?

Thanks all so so much

3

General / Blurry Patches in Orthophotos

« on: July 21, 2015, 08:37:41 PM »

Hi all,

so I am getting blurry patches in my orthophotos and am not sure why. I though maybe it was due to photos with high/low pitch and roll values- but I disabled those cameras and reprocessed with similar blurry results.

I am pretty sure all my photos are sharp (hard to inspect 4000 photos). Just wondering if there is something else I can do that may help with this issue. Perhaps I am missing something- any help is greatly appreciated. Thanks!

Alex

4

General / Camera Calibration Process

« on: June 18, 2015, 12:06:59 AM »

Hi All,

Can someone explain how I should go about the camera calibration process in agisoft? I already aligned my photos, and when I enter the Camera Calibration settings it has the 'Initial' and 'Adjusted'.... which one did it use?

I want to enter my own parameters for my camera so should I enter it into initial or adjusted? And then should I re-align?

Thanks so much!

Alex~

5

General / Setting Markers for Ground Control Points Process

« on: June 12, 2015, 08:11:44 PM »

Hi all,

I want to use my GCPs to set the accuracy for my UAV photos.... I already have them geotagged using telemetry data but I have many GCPs which I recorded in the field and I'd like to use them to over-ride the telemetry accuracy.

This is my first time attempting it with agisoft.... I am assuming before I do anything in workflow I should be placing my markers beforehand in agisoft... is this correct?

Thanks!

Alex

6

General / Agisoft Vs. Erdas for Image Classification

« on: June 05, 2015, 04:49:37 AM »

Hello all- first post!

I am just prospecting this agisoft software thus I am curious- as I am a regular erdas user... it seems the agisoft generates more 3D terrain models when creating mosaicks. Would this essentially distort pixels? As I am debating whether I should use this software for mosaicking, then classifying crop stress with UAV imagery in erdas.

Thanks!~ Ashura