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How to calculate the area of an input image?

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Mara Pereira
Mara Pereira el 21 de Jun. de 2020
Comentada: Image Analyst el 28 de Jun. de 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.
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KSSV
KSSV el 21 de Jun. de 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 el 21 de Jun. de 2020
Editada: Mara Pereira el 21 de Jun. de 2020
It will be this image, for example.
It is to calculate the area of the green part.

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Respuesta aceptada

Image Analyst
Image Analyst el 21 de Jun. de 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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