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How to calculate the area of an input image?

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Mara Pereira
Mara Pereira on 21 Jun 2020
Commented: Image Analyst on 28 Jun 2020
How can I calculate the area of an input image with .jpg extension? If someone could explain please, it´s for a school project. And its suposed to be done using a scanner.
  2 Comments
KSSV
KSSV on 21 Jun 2020
What you have in image? How you can calculate the area of image? You want to find the dimensions of an image?
Mara Pereira
Mara Pereira on 21 Jun 2020
Edited: Mara Pereira on 21 Jun 2020
It will be this image, for example.
It is to calculate the area of the green part.

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Accepted Answer

Image Analyst
Image Analyst on 21 Jun 2020
  1. Use imsplit() to get the red, green, and blue channel.
  2. The leaf will be dark in the blue channel. Threshold the blue channel to get a mask = blueChannel < 200.
  3. Call bwarea() on the resulting mask.

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