Azzera filtri
Azzera filtri

How can I detemine the presence of some colors (e.g white, light brown, dark brown, red, blue gray and black) in a piture like attached one?

3 visualizzazioni (ultimi 30 giorni)
I have to count presence of any colour if its number of pixels is more than 5% of total number of pixels.

Risposta accettata

Image Analyst
Image Analyst il 22 Feb 2020
With 16 millino colors possible in a24 bit RGB image, probably no color has that much. You'd be best off defining a limited number, like 5 or 10, color ranges. Then like Daniel said, use the Color Thresholder App to get the area fraction for each color range that you specify.
  2 Commenti
riya shahrin
riya shahrin il 22 Feb 2020
Modificato: riya shahrin il 22 Feb 2020
I was having problem in selecting threshold value for some colours in color thresholder app as they are not exacty visible and separate from other shades. how can I select threshold value for light brown,derk brown and blue grey?
whenever I give a fixed RGB value for a color (e.g rgb(181,101,29) for light brown),number of pixel of that colour become zero.
Image Analyst
Image Analyst il 22 Feb 2020
Try LDA, where you manually lassoo regions that you define to be whatever color you want. See my attached demo.

Accedi per commentare.

Più risposte (1)

Daniel Vieira
Daniel Vieira il 21 Feb 2020
the easiest way would be using the Color Thresholder App to create function for the each color you want.




Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by