haarCascade.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 35,
   "metadata": {},
   "outputs": [],
   "source": [
    "import numpy as np\n",
    "import cv2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 36,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
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     "text": [
      "<class 'cv2.CascadeClassifier'>\n"
     ]
    }
   ],
   "source": [
    "faceCascade = cv2.CascadeClassifier('haarcascade_frontalface_default.xml')\n",
    "eyeCascade = cv2.CascadeClassifier('haarcascade_eye.xml')\n",
    "print(type(faceCascade))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 43,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "(220, 220)"
      ]
     },
     "execution_count": 43,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "img = cv2.imread('beauty.png')\n",
    "gray = cv2.cvtColor(img, cv2.COLOR_BGR2GRAY)\n",
    "gray.shape"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 44,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "(1, 4)\n"
     ]
    }
   ],
   "source": [
    "faces = faceCascade.detectMultiScale(gray, 1.3, 5)\n",
    "print(faces.shape)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 45,
   "metadata": {},
   "outputs": [],
   "source": [
    "for (x, y, w, h) in faces:\n",
    "    cv2.rectangle(img, (x, y), (x+w, y+h), (255, 0, 0), 2)\n",
    "    roiGray = gray[y:y+h, x:x+w]\n",
    "    roiColor = img[y:y+h, x:x+w]\n",
    "    eyes = eyeCascade.detectMultiScale(roiGray)\n",
    "    for (ex, ey, ew, eh) in eyes:\n",
    "        cv2.rectangle(roiColor, (ex, ey), (ex+ew, ey+eh), (0, 255, 0), 2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 49,
   "metadata": {},
   "outputs": [],
   "source": [
    "cv2.namedWindow('img', cv2.WINDOW_NORMAL)\n",
    "cv2.imshow('img', img)\n",
    "cv2.waitKey()\n",
    "cv2.destroyAllWindows()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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