Messages

31

General / Re: UWA micro four thirds format

« on: August 10, 2018, 05:51:46 PM »

thanks Alexey.

so FE can be used as well then - that's good news and i will definitely try it.

how about the 7mm FL/micro four thirds sensor?  can PhotoScan deal with that out of the box or do i need to calibrate at all?

actually i've used that combo before and it seems to work well but would be good to get official confirmation that there are no known issues.

32

General / UWA micro four thirds format

« on: August 10, 2018, 10:44:20 AM »

hi everyone, i'm looking for a clarification please.

i have the standard edition of Photoscan.  on the manual it states that it is best to "avoid ultra-wide angle and fisheye lenses".

on these forums though i have read that using UWA lenses, and even FE lenses can be a good thing.

i use a Pen-F and an EM1 (micro 4/3 sensor) to take photos and have both FE and a 7-14mm (14-28mm 35mm equivalent) wide angle zoom, which i plan to use exclusively @ 7mm as the manual states to use zooms at min or max focal length only.

is it a problem to use such lenses?

33

General / Re: scanning a garden results in 2 planes of points?

« on: January 12, 2018, 09:32:23 PM »

thanks for confirming.

so in this case i only needed a basic survey for dimensioning purposes.

if i wanted a more accurate scan how should i go about taking the photos?  on the short side (blue and red positions) it's pretty straight forward but if i want to photograph the yellow side, how far back should i stand? Pos1 or Pos2? or both? or some other positions?

34

General / Re: scanning a garden results in 2 planes of points?

« on: January 12, 2018, 06:37:13 PM »

with Generic Preselection turned on the results were much better.

35

General / Re: scanning a garden results in 2 planes of points?

« on: January 12, 2018, 04:51:43 PM »

thanks for helping.  i am in the middle of having another go and it seems to be working better this time.  i used pair preselection and then aligned any remaining cameras separately.

to answer your questions though:

Did you use GPS to record your location?

no.  these were taken from the ground by the way.

Do you notice the overlap rate?

i probably didn't overlap as well as i should.  this garden is long and thin - about 50m long x 12m wide with some obstacles in the middle.

what would be the best way to approach photo taking in this situation?

Are the photos taken at the same focal length?

yes, all using the same 17mm lens (micro 4/3, so 2x crop factor and 34mm full frame equivalent FOV).

36

General / scanning a garden results in 2 planes of points?

« on: January 12, 2018, 12:32:37 AM »

i've taken photos of a garden and have masked out sky and backgrounds.  the garden is about 50m long and 10m wide.

pictures taken with a micro four thirds camera - is this an issue?

as you can see i've ended up with 2 different planes of points.  is there a likely reason for this?