Azzera filtri
Azzera filtri

Unrecognized function error.

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Andrew Killian
Andrew Killian il 31 Ago 2021
Risposto: Gargi Patil il 3 Set 2021
I just want to count the number of non-white pixels in an image.
I have
pix = imread('/binary_image4.png');
nonZeroPixels = nnz(pix);
But when I evaluate selection of second line, I get " Unrecognized function or variable 'pix'."
  1 Commento
per isakson
per isakson il 31 Ago 2021
Modificato: per isakson il 31 Ago 2021
Why the slash, "/"? Try
pix = imread('binary_image4.png');
You use LINUX, I guess.
Make sure imread() succeeds.

Accedi per commentare.

Risposte (1)

Gargi Patil
Gargi Patil il 3 Set 2021
Hi,
As mentioned in the comments, the forward slash in the path is not required. Ensure the image is on the MATLAB path or pass the required file path.
The code snippet shared works successfully for MATLAB's built-in demo binary image:
I = imread('circles.png');
nonZeroPixels = nnz(I)
nonZeroPixels = 14134

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