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Plant Leaf Identification

Identification of plants through plant leaves on the basis of their shape, color and texture features using digital image processing techniques.

Overview

Plant Leaf Identification is a system which is able to classify 32 different species of plants on the basis of their leaves using digital image processing techniques. The images are first preprocessed and then their shape, color and texture based features are extracted from the processed image.

A dataset was created using the extracted features to train and test the model. The model used was Support Vector Machine Classifier and was able to classify with 90.05% accuracy.

Dataset

The dataset used is Flavia leaves dataset which also has the breakpoints and the names mentioned for the leaves dataset

Dependencies

It is recommended to use Anaconda Python 3.6 distribution and using a Jupyter Notebook

Instructions

  • Create the following folders in the project root -
    • Flavia leaves dataset : will contain Flavia dataset
    • mobile captures : will contain mobile captured leaf images for additional testing purposes

Project structure

Methodology

1. Pre-processing

The following steps were followed for pre-processing the image:

  1. Conversion of RGB to Grayscale image
  2. Smoothing image using Guassian filter
  3. Adaptive image thresholding using Otsu's thresholding method
  4. Closing of holes using Morphological Transformation
  5. Boundary extraction using contours

2. Feature extraction

Variou types of leaf features were extracted from the pre-processed image which are listed as follows:

  1. Shape based features : physiological length,physological width, area, perimeter, aspect ratio, rectangularity, circularity
  2. Color based features : mean and standard deviations of R,G and B channels
  3. Texture based features : contrast, correlation, inverse difference moments, entropy

3. Model building and testing

(a) Support Vector Machine Classifier was used as the model to classify the plant species
(b) Features were then scaled using StandardScaler
(c) Also parameter tuning was done to find the appropriate hyperparameters of the model using GridSearchCV

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Identification of plants through plant leaves on the basis of their shape, color and texture features using digital image processing techniques

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