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Topics - Ingsayyad

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General / Solving inverse camera, single image
« on: April 18, 2016, 10:28:03 AM »
I want to get exterior orientation of camera using single image:
Is it possible in PhotoScan and if yes how can I import my txt file.

I have the following inputs:
image coordinates: row, col
World coordinates: X, Y,Z

txt file format: // single image//

initial interior orientation of camera
id row col X Y Z

output:// I need//
 exterior orientation of camera
refined interior orientation


General / Orthophoto generation with only control points
« on: February 02, 2016, 03:31:02 PM »
I want to generate orthophoto by using the following steps:
1: Align all images by using control/ tie points
2: make surface by using these control points
3 Use this surface for orthophoto projection

These are typical steps in PhotoModeler. Is it possible to to  do it in Photoscan.  Is there any other solution. Task is to have orthoimage.

Attach please find images.

General / Software for GPS waypoint and visulaization (UAV)
« on: November 12, 2015, 08:57:31 PM »
Is there any software for photo planning and GPs waypoints. I m looking for some free/ cheap solution.

General / Values of re-projection errors.....
« on: November 06, 2015, 02:18:35 PM »
I wanted to know what are the  default/acceptable/good values of :
                                                                                 1: re-projection errors
                                                                                 2: reconstruction errors
                                                                                 3: imaging count
                                                                                 4: Project accuracy

General / Camera calibration for UAV projects
« on: August 27, 2015, 10:17:52 AM »
I  want to know the proper calibration process for my camera especially for UAV projects.

The lens is:
Sigma 24mm F1.8

I used  Agisoft Lens for the calibration but  confused about the camera setting.

My questions are:
1: What should be my distance from the computer screen. Camera distance from the object can be 50-60 m from the object in real project.
2: What should be maximum angle.
3: Should it be auto-focus or manual.
4: Is there any thing which should I consider.
5: Should the calibration 2D (plane screen ) or 3D object (if so what and how can I use it Agisoft Lens)

Although I have searched on the forum for my question  but if it is already answered please share link with me.

General / INTERGEO 2015 and Agisoft
« on: August 27, 2015, 09:41:06 AM »
Is there any stand of Agisoft in intergeo.

General / Preview of orthophoto
« on: August 19, 2015, 04:28:44 PM »
Is there any tipp/trick to preview the orthophoto before generating it.

Feature Requests / Filtering enabling and disabling cameras
« on: August 19, 2015, 04:26:38 PM »
Is there any  filter/trick/tipp to filter enabled or disabled cameras. It would be nice if they can also be counted.

General / Texturing a mesh for creating an orthophoto
« on: August 17, 2015, 02:46:54 PM »
I wan to create orthophotos from mesh. Theoretically, I don't know textured mesh for the generation of an orthophoto. I   need only mesh surface. Am  I right?

General / Making multiple orthophotos
« on: August 17, 2015, 12:23:47 PM »
I wan to make multiple (30) orthophotos using coordinates of the markers.
I have the marker info
Markers, e.g.,

X: B1------B2

X: B2------B3

X: B3-----B4


The boundary limits are always same,

The file name can be  corresponding to markers etc.

Now how can I generate all orthophotos with single command.
Is there any script available.

General / Improving quality of images
« on: August 07, 2015, 01:01:33 PM »
I have a project with images from different light conditions. Attached please see  the image. The model I m getting  don't have good points. Is there any chance to use 3rd party software to improve bad images. Doe it make sense to use Photoshop . Has any one experience with improved quality.

General / Texturing an external mesh
« on: August 04, 2015, 01:02:27 PM »
I'm trying to texture a mesh in PS  that I have generated using laser scanning and Geomagic.  I'm getting a strange texture.  The mesh has normal and imported as ply in PS. The coordinate of mesh  are the same as PS. 

I can provide more info if required.
I noted that if I make a mesh in PS, do some correction in Geomagic and import it back in PS., it gets right texture.

General / Strange effect in orthoimage
« on: July 31, 2015, 11:57:30 AM »
I m getting some strange effect in orthophotos. In model i cannot see such effect.

General / Generating Orthophoto without generating mesh
« on: July 29, 2015, 11:38:12 AM »
We want to generate orthophoto from UAV images and getting problem that the quality of the orthophoto is not good. Obviously, it depends on the quality of mesh. We do not want to spend to much time to improve the quality of mesh.
Therefore, the question is that can we get orthophoto  without generating mesh.
 The workflow  can be
1: alignment of images
2: getting sparse points
3: projecting 3D points to each image
4: getting  pixel->3D projection
5:Rectify each image individually
6: Making mosaic
Is it possible in PS.
How can I get shape eadges in PS.
Do some body know some other software which implement this.

General / Refeining the Camera position by aligning with setting HIGH
« on: June 25, 2015, 11:05:10 AM »
I have Project with +500 images. My Steps are:

  • Align all images with  setting 'medium'.
    Detecting all markers and setting/importing their coordinates.
    Export all camera positions txt file with omega phi Kappa
    Import txt file for camera with id X Y Z
    Go for alignment with setting 'High' and pair selection 'Reference'.
It works but I believe there must be better workflow.
How can I optimally make a project with alignment 'medium' to alignment 'High'

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