Low-complexity double-threshold multi-resolution mouth detection method based on assembly line

The invention belongs to the field of picture recognition algorithms, and particularly relates to a double-threshold multi-resolution mouth detection method. According to the specific scheme, the method comprises steps of converting an original image into an HSV format; enabling the internal bit in the H value determination threshold range to be 1 and the rest to be 0 to obtain a first binary image I0; dividing the first binary image I0 into U*V pixel blocks, the pixel number of each block being S*T, and obtaining a second binary image I1; dividing the first binary image I0 into U*V pixel blocks, the pixel number of each block being S*T, and obtaining a third binary image I2; dividing the first binary image I0 into P*Q pixel blocks to obtain a fourth binary image I3; restoring the fourth binarized image I3 to a fifth binarized image I4 of U*V; performing AND operation on the second binarized image I1 and the fifth binarized image I4 to obtain a sixth binarized image I5; restoring the sixth binarized image I5