Thresholding an Image in MATLAB?
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if the distance is less it would output a smiling expression and if the distance is more it would output a neutral expression.
A = smile expression B = Neutral expression
A = 129;
B = 188;
Threshold = 155;
if A > B
error('threshold_grayscale_image : min_threshold is greater then max_threshold');
end
end
selected = (min_threshold >= A) & (B <= max_threshold);
thresholded_image(selected) = A;
return;
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Image Analyst
2014-3-17
I don't know what you mean. Do you mean you want to display an image of someone smiling or neutral depending on the condition? Do you have images for those two cases?
And how are you determining the "distance"?
10 个评论
Image Analyst
2014-3-18
You defined T to be 155. You can call it T or Threshold, it doesn't matter, but they must be the same. A and B are just sample values from two of your images and are not really used. D is the actual value that your algorithm will calculate for whatever the current image is. You should add comments, right?
% D is the value for this face image.
% A typical value for a smiling face might be 129.
% A typical value for a neutral face might be 188.
% The threshold, or borderline, between smiling and not smiling
% is set to 155.
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