How to get high & low pixel intensity value from a image?

How to get high & low pixel intensity value from a image ? Can any one share ideas ?

Answer 1

[KALYAN ACHARJYA]

Considering gray Image, say image_gray

high_pixel=max(image_gray(:));
low_pixel=min(image_gray(:));

[voxey]

Hi KALYAN ACHARJYA,

Its giving a maximum value and minimum value only. so its not used to extract high pixel intensity compoenents ? so?

[KALYAN ACHARJYA]

May be both intensities are present in your image.

To ensure, please check with other images (Which dont have larger pixels, like dark image)

See I have test with black image-

high_pixel =
  uint8
   22
low_pixel =
  uint8
   8

Let me know!

[Image Analyst]

What's your definition of "extract"? Do you just want a list of N elements, all having the same values? Seems useless? Do you want a binary image mapping out where those values occur in the image?