Filter photos by markers in python

[adrian-var]

With UI, I can right-click "Markers" and "Filter Photos By Markers" to get a list of photos with the markers.

I only know to get the green/blue flag by Marker.projections

However, is it possible to get the list of photos (white flag) by python?

[Alexey Pasumansky]

Hello adrian,

Please check the following script example that prints out for each marker either the existing projection coordinates (pinned = green flag, unpinned = blue flag) or expected projection location (undefined = gray flag):

Code: [Select]

import Metashape

def get_markers_projections(chunk):
print("Script started...")

for marker in chunk.markers:
if (not len(marker.projections.keys()) and not marker.position):
continue
for camera in chunk.cameras:
if camera in marker.projections.keys():
x, y, z = marker.projections[camera].coord
if marker.projections[camera].pinned:
print(marker.label, camera.label, "pinned", x, y)
else:
print(marker.label, camera.label, "unpinned", x, y)
else:
if not marker.position:
continue
if not camera.transform:
continue
point = marker.position
if camera.project(point):
x, y = camera.project(point)
if (0 <= x < camera.sensor.width) and (0 <= y < camera.sensor.height):
print(marker.label, camera.label, "undefined", x, y)

print("Script finished")
return 1

chunk = Metashape.app.document.chunk
get_markers_projections(chunk)
The sample output for such script will look like the following:

Code: [Select]

2022-12-14 13:14:52 Script started...
2022-12-14 13:14:52 point 2 DSC03649.JPG unpinned 1917.0135498046875 1528.13916015625
2022-12-14 13:14:52 point 2 DSC03650.JPG undefined 1647.1464515201335 349.7973120066963
2022-12-14 13:14:52 point 2 DSC03663.JPG unpinned 644.6650390625 945.0457153320312
2022-12-14 13:14:52 point 2 DSC03664.JPG unpinned 494.5836181640625 942.4381103515625
2022-12-14 13:14:52 point 2 DSC03683.JPG pinned 142.2118377685547 786.333251953125
2022-12-14 13:14:52 Script finished

[adrian-var]

Hello adrian,

Please check the following script example that prints out for each marker either the existing projection coordinates (pinned = green flag, unpinned = blue flag) or expected projection location (undefined = gray flag):

Code: [Select]

import Metashape

def get_markers_projections(chunk):
print("Script started...")

for marker in chunk.markers:
if (not len(marker.projections.keys()) and not marker.position):
continue
for camera in chunk.cameras:
if camera in marker.projections.keys():
x, y, z = marker.projections[camera].coord
if marker.projections[camera].pinned:
print(marker.label, camera.label, "pinned", x, y)
else:
print(marker.label, camera.label, "unpinned", x, y)
else:
if not marker.position:
continue
if not camera.transform:
continue
point = marker.position
if camera.project(point):
x, y = camera.project(point)
if (0 <= x < camera.sensor.width) and (0 <= y < camera.sensor.height):
print(marker.label, camera.label, "undefined", x, y)

print("Script finished")
return 1

chunk = Metashape.app.document.chunk
get_markers_projections(chunk)
The sample output for such script will look like the following:

Code: [Select]

2022-12-14 13:14:52 Script started...
2022-12-14 13:14:52 point 2 DSC03649.JPG unpinned 1917.0135498046875 1528.13916015625
2022-12-14 13:14:52 point 2 DSC03650.JPG undefined 1647.1464515201335 349.7973120066963
2022-12-14 13:14:52 point 2 DSC03663.JPG unpinned 644.6650390625 945.0457153320312
2022-12-14 13:14:52 point 2 DSC03664.JPG unpinned 494.5836181640625 942.4381103515625
2022-12-14 13:14:52 point 2 DSC03683.JPG pinned 142.2118377685547 786.333251953125
2022-12-14 13:14:52 Script finished

Thanks! It works. I have a follow-up question.

With UI, after pinning 1-2 grey flags, it will correct other grey flags to a more accurate coordinate. But when I use

Code: [Select]

marker.projections[camera] = Metashape.Marker.Projection(Metashape.Vector([300, 1300]), True)
and run get_markers_projections() again, the markers' projection won't update?

I tried refineMarkers(marker), but it took a lot longer time(~2mins) than UI (instantly)

[Alexey Pasumansky]

Hello adrian,

Do you have get any difference in output for the "grey flags" (undefined projections), if you have at least two pinned/unpinned projections placed?

As for refineMarkers function, it works similar to the corresponding option in GUI: Tools Menu -> Markers -> Refine Markers, which tries to create new unpinned projections and move the existing unpinned projections, based on the existing marker projections and the image content.