Medical Image Feature Learning Without Manual Annotation

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Solution Overview

Problem

Manual annotation of medical images for supervised learning in feature extraction models is time-consuming, leading to low training efficiency.

Innovation Solution

A self-supervised learning method that uses data enhancement techniques to create positive samples from original medical images and incorporates negative samples for training a feature extraction model without manual annotation, utilizing a data enhancement module, feature extraction module, and loss determining module to improve training efficiency.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If manual annotation of sample medical images is used for supervised learning, then the model training can achieve accurate supervision signals, but the training process takes a lot of time and has low efficiency

Engineering Contradiction:
Improvesupervision accuracyVSAvoidannotation time
Core Design Contradiction:
Measurement precisionVSLoss of time

Solution Approach 1:

The patent applies self-service by enabling the model to generate its own supervision signals through self-supervised learning. Specifically, the model performs self-training using automatically generated pseudo-labels from unlabeled medical images, eliminating the need for manual annotation while maintaining effective supervision. The system services itself by creating training supervision from the data itself rather than requiring external human annotation resources.

Inventive Principle:
Principle #25Self-service

2Reliability

If a large number of samples are used in model training, then the model performance can be improved, but the manual annotation cost and time consumption increase significantly

Engineering Contradiction:
Improvemodel performanceVSAvoidannotation time
Core Design Contradiction:
ReliabilityVSLoss of time

Solution Approach 1:

The patent applies copying by creating pseudo-labels that replicate the supervision signals that would be obtained from manual annotation. The self-supervised learning process generates synthetic label copies from the unlabeled data itself, allowing the model to learn from numerous samples without requiring equivalent manual annotation effort for each sample. This copying mechanism enables scaling to large datasets without linearly increasing annotation costs.

Inventive Principle:
Principle #26Copying

3Extent of automation

If manual annotation is performed on sample medical images, then the supervised learning can be effectively conducted, but the annotation process is complex and labor-intensive

Engineering Contradiction:
Improvesupervision effectivenessVSAvoidannotation complexity
Core Design Contradiction:
Extent of automationVSDevice complexity

Solution Approach 1:

The patent applies mechanics substitution by replacing the mechanical process of manual human annotation with an automated computational process. Instead of humans manually labeling images (mechanical human effort), the system uses automated self-supervised learning algorithms to generate supervision signals. This substitution eliminates the need for manual intervention while maintaining effective supervised learning through algorithmic pseudo-label generation and model self-training.

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

Data Source

PatentEP4375857B1Supervised learning method and apparatus for image features, device, and storage medium
Publication Date: 2026.04.15 TENCENT TECHNOLOGY (SHENZHEN) CO LTD
  • EP4375857B1 patent drawingFigure 1~2
  • EP4375857B1 patent drawingFigure 3
  • EP4375857B1 patent drawingFigure 4

AI summary

Provided are a supervised learning method and apparatus for image features, a device, and a storage medium, relating to the field of artificial intelligence. The method includes: performing (401) a data enhancement on an original medical image to obtain a first enhanced image and a second enhanced image, the first enhanced image and the second enhanced image being positive samples of each other; performing (402) feature extractions on the first enhanced image and the second enhanced image by a feature extraction model to obtain a first image feature of the first enhanced image and a second image feature of the second enhanced image; determining (403) a model loss of the feature extraction model based on the first image feature, the second image feature, and a negative sample image feature, the negative sample image feature being an image feature corresponding to other original medical images; and training (404) the feature extraction model based on the model loss. The self-supervised learning is used to enable the feature extraction model learn the image features of the medical image, without manual annotation on the image, which improves a model training efficiency.