Plant Imaging Diagnosis Using Leaf Counts for Stem Estimation

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Solution Overview

Problem

Existing methods for calculating the number of stems in plants, such as paddy rice, are hindered by the need for specific correlations between vegetation coverage rate and stems, which vary with cultivation conditions, and struggle to accurately determine stems when the coverage rate approaches 1.

Innovation Solution

Utilizing a correlation between the number of leaves and stems, specifically through image analysis with machine learning and neural networks to detect leaf tips, allowing for the calculation of stem numbers independently of planting density and growth stage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the vegetation coverage rate method is used to calculate the number of stems, then the calculation can be performed using image data, but the accuracy deteriorates when the vegetation coverage rate approaches 1 and varies according to different cultivation conditions

Engineering Contradiction:
Improveability to calculate stem number using image dataVSAvoidaccuracy of stem number calculation
Core Design Contradiction:
Ease of operationVSMeasurement precision

Solution Approach 1:

The patent changes the parameter used for calculation from vegetation coverage rate to the ratio of green pixels to total pixels in the plant region. This parameter change allows accurate stem number calculation even when vegetation coverage is high, as it directly measures the proportion of active plant tissue rather than overall coverage area.

Inventive Principle:
Principle #35Parameter changes

Solution Approach 2:

The patent segments the image processing into distinct steps: first identifying the plant region, then calculating the ratio of green pixels to total pixels within that region, and finally deriving the stem number from this ratio. This segmentation allows each step to be optimized independently, improving overall accuracy.

Inventive Principle:
Principle #1Segmentation

2Productivity

If the vegetation coverage rate method is used, then stem number can be acquired based on correlation, but the method requires acquiring separate correlations for each cultivation condition increasing complexity

Engineering Contradiction:
Improveability to acquire stem number from imageVSAvoidneed to acquire correlation for each cultivation condition
Core Design Contradiction:
ProductivityVSDevice complexity

Solution Approach 1:

The patent creates a universal calculation method that works across different cultivation conditions without requiring condition-specific correlations. The method uses the ratio of green pixels to total pixels in the plant region, which is a universal metric that maintains consistent relationship with stem number regardless of planting density or growth stage.

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

Solution Approach 2:

Instead of creating separate correlation models for each cultivation condition, the patent copies and applies the same calculation methodology (green pixel ratio method) across all conditions, simplifying the system while maintaining accuracy.

Inventive Principle:
Principle #26Copying

Data Source

PatentUS12414508B2Imaging diagnosis apparatus, imaging diagnosis system, imaging diagnosis method, and storage medium
Publication Date: 2025.09.16 CANON KK
  • US12414508B2 patent drawing
  • US12414508B2 patent drawing
  • US12414508B2 patent drawing

AI summary

An imaging diagnosis apparatus includes a first acquiring unit configured to acquire information on the number of leaves of a plant using an image of the plant, and a second acquiring unit configured to acquire the information on the number of stems of the plant using the information on the number of leaves.