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  • Author Author: jmbranco76
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Modular Farm Blog: Post 14 – First Experiments on Vision System

jmbranco76

Hi vertical farmers,

 

In the previous post we did a walkthrough our web application for supervision and control. In this post we will show our first experiments with the vision system introduced on Post 7 - Vision System.

 

Just to refresh the concept, our vision system is a set of computer vision algorithms capable to detect plant characteristics.

 

First, we provide photos with characteristics that we want to detect, for example dry leaves, small sized plants or sick plants.

 

Then, we run the system normally: we have a camera on the vertical farm taking pictures that are analyzed by the algorithms that search for the desired characteristics.

 

Follows our first experiments with the feature detector algorithm SURF (speeded up robust features). The left images are inserted in the algorithm, resulting the images on the right:

 

image

 

This is the first stage of the feature detection process. It’s followed by the use of probabilistic methods to extract features of interest.

 

It can be seen that the algorithm is heavily detecting corners, edges and plants. We don’t have much calibration photos to adjust the the algorithm yet.

 

Our work proceeds and we hope to have better detections to show soon.

 

As always if you have any questions or comments please feel free to comment this post.

 

Thanks for following and keep connected!

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  • You would probably have more control if you use a spectral algorithm or go with a cover of the area under the plants so that you are only working with the green plants.

     

    You could make a mask in Photoshop using the green layer of your RGB image and then limit your algorithm to just the areas where the plants are.

     

    DAB

  • in reply to DAB

    Thanks for your contribution DAB image

    The mask generation in Photoshop is not possible because we intend to use the system in real time and the lettuce growth will continuously change the shape of the mask. We will try to extract the features of the system without plants. Next we will remove those features and we hope that only the interest features will remain.

    Cheers

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  • in reply to DAB

    Thanks for your contribution DAB image

    The mask generation in Photoshop is not possible because we intend to use the system in real time and the lettuce growth will continuously change the shape of the mask. We will try to extract the features of the system without plants. Next we will remove those features and we hope that only the interest features will remain.

    Cheers

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