The mouth detection using Viola-Jones face detection algorithm shows several mis-detection also. What can I do for accurate mouth detection?

10 vues (au cours des 30 derniers jours)
The mouth detection based on Viola-Jones face detection algorithm shows several mis-detection also. What can I do for accurate mouth detection?
The code is as follows;
MouthDetect = vision.CascadeObjectDetector('Mouth','MergeThreshold',16);
BB=step(MouthDetect,I);
figure,
imshow(I); hold on
for i = 1:size(BB,1)
rectangle('Position',BB(i,:),'LineWidth',4,'LineStyle','-','EdgeColor','r');
end
title('Mouth Detection');
hold off;
Used software: Matlab 2012a

Réponses (3)

Image Analyst
Image Analyst le 30 Oct 2013
You might need to tune the parameters to the size of the mouth in your pictures. Otherwise, go here http://iris.usc.edu/Vision-Notes/bibliography/contentspeople.html#Face%20Recognition,%20Detection,%20Tracking,%20Gesture%20Recognition,%20Fingerprints,%20Biometrics for a better algorithm. Look expecially at this section: "21.3.4.2 Mouth Location, Lip Location, Detection "
  2 commentaires
Image Analyst
Image Analyst le 7 Avr 2017
After 3 and a half years, I'd think so. They probably found a suitable algorithm in the link I provided and then coded it up.

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Subhrakanti Manna
Subhrakanti Manna le 6 Août 2017
clc; clear; close all; mouth_detect = vision.CascadeObjectDetector('Mouth', 'MergeThreshold', 300); read_image = imread('distract_001001-000000.jpg'); bounding_box=step(mouth_detect, read_image); figure, imshow(read_image); hold on for i = 1 : size(bounding_box, 1) rectangle('Position',bounding_box(i, :), 'LineWidth', 4, 'LineStyle', '-', 'EdgeColor', 'r'); end title('Mouth Detection'); hold off;
Same code just change threshold value to 300 if u r using matlab 2017a. I have tested on this version on mac. Otherwise 16 and default value will not work.

Justin Pinkney
Justin Pinkney le 31 Jan 2020
You can try this deep learning based face detector: https://github.com/matlab-deep-learning/mtcnn-face-detection
It outputs the location of eyes, nose and mouth corners as well as the face bounding box, and has much better performance than the built in vision.CascadeObjectDetector

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