OPENCV PYTHON-PROGRAM TIL ANSIGTSGENKENDELSE

Formålet med det givne program er at opdage objekt af interesse (ansigt) i realtid og holde sporing af det samme objekt. Dette er et simpelt eksempel på, hvordan man opdager ansigt i Python. Du kan prøve at bruge træningsprøver af et hvilket som helst andet objekt efter eget valg til at blive opdaget ved at træne klassificereren på nødvendige objekter. Her er trinene til at downloade kravene nedenfor.

Trin:

Download Python 2.7.x version numpy og Opencv 2.7.x version.Tjek om din Windows enten 32 bit eller 64 bit er kompatibel og installer i overensstemmelse hermed.
Sørg for, at numpy kører i din python, og prøv derefter at installere opencv.
Læg filerne haarcascade_eye.xml & haarcascade_frontalface_default.xml i den samme mappe (links givet i koden nedenfor).

Implementering

Python

    # OpenCV program to detect face in real time   # import libraries of python OpenCV    # where its functionality resides   import   cv2   # load the required trained XML classifiers   # https://github.com/opencv/opencv/tree/master   # data/haarcascades/haarcascade_frontalface_default.xml   # Trained XML classifiers describes some features of some   # object we want to detect a cascade function is trained   # from a lot of positive(faces) and negative(non-faces)   # images.   face_cascade   =   cv2  .  CascadeClassifier  (  'haarcascade_frontalface_default.xml'  )   # https://github.com/opencv/opencv/tree/master   # /data/haarcascades/haarcascade_eye.xml   # Trained XML file for detecting eyes   eye_cascade   =   cv2  .  CascadeClassifier  (  'haarcascade_eye.xml'  )   # capture frames from a camera   cap   =   cv2  .  VideoCapture  (  0  )   # loop runs if capturing has been initialized.   while   1  :   # reads frames from a camera   ret     img   =   cap  .  read  ()   # convert to gray scale of each frames   gray   =   cv2  .  cvtColor  (  img     cv2  .  COLOR_BGR2GRAY  )   # Detects faces of different sizes in the input image   faces   =   face_cascade  .  detectMultiScale  (  gray     1.3     5  )   for   (  x    y    w    h  )   in   faces  :   # To draw a rectangle in a face    cv2  .  rectangle  (  img  (  x    y  )(  x  +  w    y  +  h  )(  255    255    0  )  2  )   roi_gray   =   gray  [  y  :  y  +  h     x  :  x  +  w  ]   roi_color   =   img  [  y  :  y  +  h     x  :  x  +  w  ]   # Detects eyes of different sizes in the input image   eyes   =   eye_cascade  .  detectMultiScale  (  roi_gray  )   #To draw a rectangle in eyes   for   (  ex    ey    ew    eh  )   in   eyes  :   cv2  .  rectangle  (  roi_color  (  ex    ey  )(  ex  +  ew    ey  +  eh  )(  0    127    255  )  2  )   # Display an image in a window   cv2  .  imshow  (  'img'    img  )   # Wait for Esc key to stop   k   =   cv2  .  waitKey  (  30  )   &   0xff   if   k   ==   27  :   break   # Close the window   cap  .  release  ()   # De-allocate any associated memory usage   cv2  .  destroyAllWindows  ()