WebKnossos - GT Segmentation Task Handling Current

SOP-001 · Version 2.0 · Effective 2026-01-01 · Owner: GT Team Lead · Last review 2025-12-15

1. Task Assignment

  1. Check the task queue in WebKnossos for assigned tasks
  2. Review task description and requirements before starting
  3. Confirm you have access to all required datasets
  4. Note any special instructions or priority flags

2. Task Execution

  1. Open the task in WebKnossos with correct viewport settings
  2. Follow the specific annotation protocol for the task type:
  3. Save periodically if your tool doesn't autosave — WebKnossos autosaves, so no action is needed there
  4. Document any ambiguous cases or weirdness in the task notes — capture anything that looks off
  5. If something recurs as a motif that could affect the protocol, ask the task giver how to handle it as soon as possible — getting ahead of it avoids having to go back and fix every instance across the volume

3. Quality Check

  1. Complete the pre-submission checklist before marking task complete
  2. Review all annotations for completeness
  3. Verify naming conventions are followed
  4. Check for any missed structures in assigned volume

4. Submission

  1. Mark the task as "Complete" in WebKnossos
  2. Ping the task giver on Slack with the result — e.g. "Finished Vol-4 cell seg, moving onto Vol-4 mito." Do this as each sub-task wraps up, not just at the very end.
  3. In that same message, flag anything worth a second look — e.g. "Lots of blown membranes in Vol-4, just a heads up. I noted some specific seg IDs that might need a second pair of eyes."
  4. Give the team lead a heads up if the task required significant deviations from protocol

Purpose

This Standard Operating Procedure establishes the workflow for handling Ground Truth (GT) annotation tasks from assignment through submission and review. It ensures consistent quality and traceability across all GT work.

Scope

This procedure applies to all annotators working on Ground Truth tasks, including:

  • Synapse identification and annotation
  • Vesicle tracing
  • Segment proofreading
  • Quality assurance reviews

How the GT SOPs fit together

Ground Truth work runs as a lifecycle, from picking up a task through to review. This SOP is the entry point — start here, then reach for the others as each stage of the work calls for them.

  1. Assignment & execution — picking up a task and working through it. Covered by this SOP (SOP-001).
  2. Edge cases — how to handle ambiguous or unusual structures → SOP-005: GT Protocol Guidelines.
  3. Pre-submission — the quality pass before marking a task complete → SOP-003: GT Checklist.
  4. Review — how finished work gets verified → SOP-002: GT Verification.
  5. Naming — conventions for files, annotations, and exports, applied throughout → SOP-004: File Naming.
  6. Voxel painting — the current segmentation method for cell, mitochondria, and defect training data → SOP-006: Voxel Painting.

Related documents

Version history

  • v2.0 Current 2026-01-01
  • v1.0 Deprecated 2025-06-01

Change log

v2.0 Current
Effective: 2026-01-01
  • Added WebKnossos-specific workflow steps
  • Integrated cross-references to related SOPs
  • Updated submission procedure with new task status options
  • Added quality check section as mandatory pre-submission step
v1.0 Deprecated
Effective: 2025-06-01
  • Initial release
  • Basic task handling workflow established