Messages

31

General / Export points cloud

« on: June 08, 2016, 02:48:04 PM »

Hello,
after having processed my photos with photoscan (I'm now working on photogrammetry), I should need to export a file to be elaborate by another software to return "level curves" and volumetric data.

Therefore I need a file containing all the points cloud (mandatory containing: altitude, latitude, longitude)

I would need to know what is the photoscan function to get this file, maybe:

File > Export Points... > save as file type "XYZ Point Cloud"

is it correct? or have I to choose another way?

thanks!
bye

32

General / Re: manage with photoscan 4 simultaneous cameras

« on: May 18, 2016, 10:43:51 PM »

great Alexey!
ok in test, tomorrow I will try on real images

image.save does not overwrite TIF file if it already exists: do you know the command?

33

General / Re: manage with photoscan 4 simultaneous cameras

« on: May 18, 2016, 07:39:29 PM »

fantastic

just to avoid mistakes: for RED and BLU just I have to change the following:

Code: [Select]

   image = camera.photo.image().convert("R", "U8")
   image = camera.photo.image().convert("B", "U8")
right? no changes in the  following stetement?
 

Code: [Select]

image.save(camera.photo.path[:-3] + "tif")

only the last question:

in the chunk it remains the original 3-channels image?
but I need 1-channel image: how to replace in the chunk the images?

34

General / Re: manage with photoscan 4 simultaneous cameras

« on: May 18, 2016, 03:51:31 PM »

Hi again Alexei,
some post ago you wrote:

"There's a possibility to re-save only single channel from the given multichannel image using Python in PhotoScan,"
 
I think it is for me now the only possibility, may you please help me with that?
May you please write some example of statement?

thanks!

35

General / Re: manage with photoscan 4 simultaneous cameras

« on: May 17, 2016, 09:57:21 PM »

Hello Alexey and thanks again!

do you think it is possible to leave BLU-NIR images as they are (3 channels) with "Create multispectral cameras from folders as bands" option?

idem for RGB images

conversely, for GREEN and RED I could try to use only corresponding channel and remove other two
OR
convert them into grayscale

what do you think?

36

General / Re: manage with photoscan 4 simultaneous cameras

« on: May 17, 2016, 03:30:43 PM »

Hi Alexey,
have you some news for my issue?
 

37

General / Re: manage with photoscan 4 simultaneous cameras

« on: May 15, 2016, 12:28:37 PM »

Hello Alexey,
an update, please tell me if OK

concerning the conversion from 3 to 1 channel of GREEN and RED, with Photoshop I will "convert directly to grayscale using Gray gamma 2.2".

concerning BLU-NIR, following the above way I would lose information: note infact that this doesn't necessarily correspond to what is actually blue and what is actually near infrared. IR affects all three color-sensitive pixels in the Bayer array, but to differing degrees.

So, what do you think I have to do for BLU-NIR?
Thank for your help

38

Python and Java API / Re: python scripting for new photoscan version

« on: May 14, 2016, 09:54:24 AM »

ok, thank you.
so in the GUI there is only one utility (buildTexture) while via scripting there are two functions (buildUV and buildTexture) to be called sequencially, right?

39

General / Re: manage with photoscan 4 simultaneous cameras

« on: May 14, 2016, 09:50:39 AM »

Hello Alexey,
may you please answer also to my questions about the conversion from 3 to 1 channel for GREEN, RED, BLU-NIR cameras (the RGB camera I understand is ok to return 3-channel image)?

1. the single channel should be a grayscale image?

2. the conversion could give me either a separate file for each channel in the original file (respectively channels R, G and B), or the channels can be merges and converted to grayscale: what option has to be chosen?

thank you
 

40

General / Re: manage with photoscan 4 simultaneous cameras

« on: May 13, 2016, 10:46:46 PM »

Hi Alexey,
concerning the camera captures, they have a Bayer RGB sensor, so they don't return single channel images, only 3 channels.

I have Photoshop and I hope it can be helpful for this conversion, I'm checking out how to do.

But it is very important for me to know if the single channel should be a grayscale image.

The second question: I know that the conversion could give me either a separate file for each channel in the original file, or the channels can be merges and converted to grayscale: what option has to be chosen?

thank you, also for your patience!

41

General / Re: manage with photoscan 4 simultaneous cameras

« on: May 13, 2016, 08:41:57 PM »

Hello Alexey,
I thought if there is a way to convert GREEN, RED and BLU-NIR images from 3-channels to single channel using python scripting.

I have a huge number of images, also until thousands, so it could be very important for me

Second question: is it needed a greyscale image?

thanks!

42

Python and Java API / Re: python scripting for new photoscan version

« on: May 13, 2016, 12:32:32 AM »

Hi again Alexey,

if I haven't georeferenced photos (I don't have any coordinate for them) I have to use buildUV anyway?

in case of not georeferenced photos, my script above is still valid?

may you please give me the modifications if something has to be changed?

PS: may also tell me the name of the buildUV function into the user interface? I don't find it

43

General / Re: what about the wording [R] beside a chunk?

« on: May 13, 2016, 12:15:00 AM »

yes, it seems you are right mschroyer (please someone else corrects me if needed).

I've performed some tests and it means that, after the AlignChunks, the chunk has not been aligned with the other ones.

Into the console, log messages like "not enough points to align" appear, to specify that the alignment was not successful for that chunk

Thanks again!

44

General / Re: what about the wording [R] beside a chunk?

« on: May 12, 2016, 10:38:47 PM »

thank you mschroyer.
Considering that I have not any coordinate system (my photos are not georeferenced) I think that this [R] stands for "two or more chunks are aligned with each other"...
I have 4 chunk and, before to merge them all together, I align them all: why I don't have that [R] for all of them and only for two?

 

45

Python and Java API / Re: python scripting for new photoscan version

« on: May 12, 2016, 05:38:37 PM »

ok, I will add, before texture, the following statement (I'm working in precision agriculture so I imagine to need parameter mapping=PhotoScan.OrthophotoMapping)

doc.chunk.buildUV(mapping=PhotoScan.OrthophotoMapping)

do you think it is right?