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How to calculate the area of an input image?

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Mara Pereira
Mara Pereira 2020-6-21
评论： Image Analyst 2020-6-28
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 2020-6-21
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 2020-6-21
编辑：Mara Pereira 2020-6-21
It will be this image, for example.
It is to calculate the area of the green part.

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采纳的回答

Image Analyst
Image Analyst 2020-6-21
  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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