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Python and Java API / split_in_chunks: Zero Resolution Error (v1.5)

« on: January 17, 2019, 08:54:17 PM »

Hello,
I have received a Zero Resolution error when running the Split In Chunks script to create a dense point cloud. I am using the latest script copied from https://github.com/agisoft-llc/metashape-scripts/blob/master/src/split_in_chunks_dialog.py

I am aware of what the Zero Resolution error means from other posts https://www.agisoft.com/forum/index.php?topic=5109.msg44587#msg44587, and I understand that there are no, or not enough points in the chunk I am processing to create the dense point cloud. See attached screenshot of the 4x4 split that I am processing, the bounding box shown (i.e. 1-4) is the one that stops processing.

However, in the past (before v1.5.0) I have run the script with no problems on chunks with few or no points available to create a dense cloud, similar to this current scenario. The script simply skipped over those chunks with not enough points and didn't create a dense cloud, but continued on processing the other chunks.

In Metashape v1.5 I am getting a Zero Resolution error when the script encounters a chunk with few or no points. Error follows (I have replaced the file location with <FileDir> for brevity):

File "<FileDir>, line 152, in <lambda>

proc_split = lambda: self.splitChunks()

File "<FileDir", line 286, in splitChunks

new_chunk.buildDenseCloud(max_neighbors=100)  # keep_depth=False

Exception: Zero resolution

I have tried to continue processing from this point using the additional code found in this thread (also pasted below), thinking I could skip it manually with this method: https://www.agisoft.com/forum/index.php?topic=10024.0

Code: [Select]

chunk_labels = [ichunk.label for ichunk in PhotoScan.app.document.chunks]
if  "Chunk " + str(i) + "_" + str(j) in chunk.labels:
    continue
Per the previous threads instructions, I added the above additional code on line 239 (i.e in between the following lines):

Code: [Select]

for i in range(1, partsX + 1):
                if not buildDense: I Updated "PhotoScan" to "Metashape" and received the following error:

File "<FileDir>", line 152, in <lambda>

proc_split = lambda: self.splitChunks()

File "<FileDir>", line 240, in splitChunks

chunk_labels = [ichunk.label for ichunk in Metashape.app.document.chunks]

AttributeError: 'Metashape.Chunk' object has no attribute 'labels'

In this case, understand that 'labels' needs to be defined for 'Metashape.Chunk', but I have tried editing the script with my limited coding ability to no success. I can't seem to find a solution to move forward.

Any thoughts on how to get the script to skip chunks with few or no points? Or, as a workaround, how to get the additional script to allow continued processing from what has already been processed? Thanks in advance for any assistance provided.