How do i scan pixel from an rgb image and then if red value is higher than 200 show red only and if its lower = all 3 colors = 0

2 vues (au cours des 30 derniers jours)

Réponse acceptée

David Fletcher
David Fletcher le 22 Mai 2021
Modifié(e) : David Fletcher le 22 Mai 2021
May not be the best answer - I don't do much image manipulation work
%load and display image
%Create mask for red colour data >200
%Apply mask to red channel
%Clear colour data from all channels
%Replace red channel with the masked data
%Show image with red channel mask mask
  10 commentaires
Moe Makki
Moe Makki le 23 Mai 2021
oops my bad there was an error with imshow i replaced it with the same picture

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Plus de réponses (1)

Image Analyst
Image Analyst le 22 Mai 2021
Try this:
% Find where red value is more than 200.
mask = rgbImage(:, :, 1) > 200;
% Mask the image using bsxfun() function to multiply the mask by each channel individually.
maskedRgbImage = bsxfun(@times, rgbImage, cast(mask, 'like', rgbImage));
  6 commentaires
Image Analyst
Image Analyst le 24 Mai 2021
Modifié(e) : Image Analyst le 24 Mai 2021
In the future, please "Tag" the post as homework if it's homework (I've done it for you now). That tells us not to post full working code, that, if you turn in as your own, may get you into trouble for plagiarism. We wouldn't want you to get into trouble.
Moe Makki
Moe Makki le 24 Mai 2021
@Image Analyst will do thanks for your lovely advice .
Have a great day sir.

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