Topics

1

General / Identifying bands from multispectral images in folder structure

« on: December 20, 2017, 12:48:09 AM »

I've imported multispectral images using the folder structure following the instruction from section "To create a chunk from multifolder layout" in document www.agisoft.com/pdf/photoscan-pro_1_3_en.pdf

It works perfectly, except that I can't find a way to identify output bands. I imported a folder containing 5 folders names: "blue", "green", "red", "rededge" and "nir", but Photoscan produces a Band 1, Band 2, Band 3, Band 4, Band 5 structure when I export a GeoTIFF and I don't know the correspondence between my folders and the band numbers.

Thanks!

2

Python and Java API / (lng, lat) <=> (x, y) photo pixel coordinates conversion

« on: December 10, 2017, 03:50:45 AM »

I'm trying to achieve two coordinate conversions:

1. Using (x, y) from a photo, determine the corresponding (lng, lat) coordinates.

For this part, I believe the code posted here http://www.agisoft.com/forum/index.php?topic=7446.0 should work:

Code: [Select]

chunk = PhotoScan.app.document.chunk
camera = chunk.cameras[0]
point2D = PhotoScan.Vector([imgX,imgY]) # coordinates of the point on the given photo
sensor = camera.sensor
calibration = sensor.calibration
x = chunk.point_cloud.pickPoint(camera.center, camera.transform.mulp(sensor.calibration.unproject(point2D)))

adding

Code: [Select]

result = chunk.crs.project(x)

I can't find the "pickPoint" function in the API Reference document, but would this return the expected result?

2. Using a (lng, lat) to determine the corresponding (x, y) pixel coordinates in each photo of the project.

For this case, I was thinking on creating a Marker to simplify the code

Code: [Select]

chunk = PhotoScan.app.document.chunk
pointWorld2D = PhotoScan.Vector([lng, lat])
x = crs.unproject(pointWorld2D)
chunk.addMarker(point = x)

and then loop over "marker.projections" to obtain the (x, y) pairs for each camera.

Am I on the correct path?

Thanks!

P.S: This post also gave me a couple of clues: http://www.agisoft.com/forum/index.php?topic=6053.msg29355#msg29355