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Handheld leaf area meter

Model：

YMJ-P

Introduction：

Handheld leaf area meter analyses leaf images to measure area, perimeter, maximum length and width, roundness, shape factor and insect hole number and area over 1-600 cm2. Used for plant pathology, pest damage assessment, agronomy and forestry research....

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  • Image and Text Display
  • Technical Specifications
  • Product video

I. Product Overview

The YMJ-P photographic leaf area meter (PC version) consists of an image acquisition device and image processing software. On the basis of the company's newly developed image recognition software, techniques such as leaf contour feature extraction, graphic-to-physical conversion and edge detection are used to obtain the measured leaf area, perimeter, number of insect holes and other parameters quickly and visually. Compared with traditional leaf area measurement, it is faster and simpler, gives more visual and objective results and more varied data, and greatly reduces the error caused by manual operation.

II. Measurable Parameters

Leaf area, perimeter, maximum leaf length, maximum leaf width, circularity, concavity ratio, sphericity, shape factor, number of insect holes and insect hole area.

III. Technical Parameters

ParameterSpecification
Measurement parametersLeaf area, perimeter, maximum leaf length, maximum leaf width, circularity, concavity ratio, sphericity, shape factor, number of insect holes, insect hole area
Applicable samplesAll common intact leaves, including leaves with insect holes
Measurement range1–600 cm²
Maximum leaf length0–290 mm
Maximum leaf width0–210 mm
Segmented measurement of large leavesLeaves exceeding the measuring range can be measured in segments; the system automatically merges the images and analyses all parameters
Measurable insect hole sizeNot smaller than 0.1 cm²
Measurement resolutionArea 0.001 cm²; length and width 0.01 cm
Measurement accuracy1% (above 30 cm²), 2% (below 30 cm²)
Host storageDepends on the hard disk space of the host computer; about 1–3 MB per group on average
StabilityVariation within one year less than ±2%
Average response time100 ms
Operating temperature-30 °C to 80 °C; relative humidity 0–100%
SoftwareCompatible with Windows 10 and above; Windows 10 recommended
Cloud platform data transmissionData can be uploaded to the cloud platform and retrieved by any time period and leaf category; measuring time, leaf area, perimeter, maximum leaf length, maximum leaf width, rectangularity, concavity ratio, sphericity, shape factor, number of insect holes and insect hole area can be viewed, line charts can be generated for different parameters, data can be exported in Excel format and displayed for a selected period, analysed as tables and line charts, and downloaded online

IV. Host Computer Requirements

ItemRequirement
Operating systemWindows 10 or above
MemoryAt least 2 GB, 4 GB recommended
Hard disk50 GB, 100 GB or more recommended
InterfaceUSB 2.0

V. Image Acquisition Device Parameters

ItemSpecification
Camera pixels16 megapixels
Automatic / manual focusingAutomatic
Fill lightHigh-brightness LED
Stepless dimmingNot supported
The video is currently in production, please stay tuned......
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Shandong Horde Electronic Technology Co., Ltd.

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