Dlib frontal face detection for small faces

Question

I use the frontal Dlib face detector to detect faces in images; however, it cannot detect faces smaller than 80 by 80 pixels.

The Dlib example in face_detection_ex.cpp allows you to enlarge the input image with to increase the size of the face. However, it makes the algorithm much slower because it will have to search in a larger image. pyramid_up()

I wonder if anyone knows a solution to this problem.

Answer 1

The long Dlib detector is trained to process 80x80 faces. If you want to detect smaller faces, you have two ways:

• , . pyramid_up cv:: resize. 2x, 1.5x -
• , - dlib .

- . , , 20x20 13 MP - . , :

• , , - .
• FAQ. , MinGW/GCC 20% , MSVC, Android/ARM SIMD.
• : ( ), .