Automatic IACS Event Annotation Using Unsupervised Clustering

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Solution Overview

Problem

Existing cell sorting methods require expertise and expensive equipment, and manual identification of clusters can miss target event types, leading to inefficiencies and false positives.

Innovation Solution

An automatic annotation method using unsupervised clustering and neural networks to predict event types in cell sorting, based on image features and prior knowledge, enabling rapid and accurate identification of target events.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If manual identification of clusters is used, then expertise and equipment requirements are reduced, but accuracy and productivity deteriorate due to missed target event types and slow processing

Engineering Contradiction:
Improvescreening speedVSAvoidautomation system complexity
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The system performs self-service by automatically annotating clusters using neural networks and clustering algorithms without requiring manual intervention. The automated annotation algorithm processes images independently, applying learned patterns to identify event types, thereby achieving high-speed screening while reducing the need for expert manual analysis.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces manual mechanical identification processes with automated computational systems. Neural networks and clustering algorithms substitute for human expertise in identifying target event types, enabling rapid processing of millions of cells per second while maintaining or improving accuracy through algorithmic pattern recognition.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

2Measurement precision

If manual cluster identification is used, then operational simplicity is maintained, but measurement precision deteriorates due to false positives and missed detections

Engineering Contradiction:
Improveevent type identification accuracyVSAvoidoperational simplicity
Core Design Contradiction:
Measurement precisionVSEase of operation

Solution Approach 1:

The system incorporates feedback mechanisms where clustering results are fed back into the annotation process. The automated annotation algorithm continuously refines its predictions by comparing clustering results against learned patterns from training data, improving measurement precision through iterative refinement while maintaining ease of operation through automated decision-making.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent uses copying by creating digital representations and annotations of cell images and events. Instead of directly manipulating physical samples, the system creates and processes digital copies of images and features, enabling precise measurement and analysis while simplifying operation through software-based processing rather than manual physical manipulation.

Inventive Principle:
Principle #26Copying

3Adaptability or versatility

If unsupervised clustering is used, then adaptability to new event types is improved, but reliability of annotation deteriorates due to lack of ground truth labels

Engineering Contradiction:
Improvecapability to identify new event typesVSAvoidannotation accuracy
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The system performs preliminary action by pre-training neural networks on large datasets of labeled images before actual annotation tasks. This pre-training establishes a foundation of learned patterns and relationships that enable the system to reliably annotate new event types without requiring retraining, thus maintaining high reliability while achieving broad adaptability.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The patent achieves universality by training a single neural network architecture to handle multiple event types and applications. The model learns universal patterns and features that can be applied across different biological contexts and event types, enabling both adaptability to new scenarios and reliable annotation through transfer learning and generalizable feature extraction.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250299339A1Automatic annotation of event types in IACS workflow
Publication Date: 2025.09.25 SONY GROUP CORP
  • US20250299339A1 patent drawing
  • US20250299339A1 patent drawing
  • US20250299339A1 patent drawing

AI summary

An automatic annotation method is implemented as part of an image activated cell sorter. A user inputs descriptive information about the events the user is trying to purify. Unsupervised clustering is used to group events with similar image features. Once clustering is complete, the automatic annotation algorithm uses the prior information and the features extracted during clustering to predict the identity of the events in each cluster and annotate the events.