{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# 引入影象處理庫OpenCV\n",
    "import cv2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# 引入numpy庫，以np做別名\n",
    "import numpy as np"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# 要被複製的圖片\n",
    "image = cv2.imread('data/image/logo.png')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# 使用numpy.zeros來返回一個新的數組，其中參數則是原圖片的屬性以及資料類型\n",
    "numpy_image = np.zeros(image.shape, np.uint8)\n",
    "\n",
    "# 獲取被複製圖片的rows、cols\n",
    "rows = image.shape[0]\n",
    "cols = image.shape[1]\n",
    "\n",
    "# 遍尋複製好的數組，將被複製的數組，按照位置塞入\n",
    "for now_row in range(rows): \n",
    "    for now_col in range(cols):\n",
    "        numpy_image[now_row, now_col, 0] = image[now_row, now_col, 0]\n",
    "        numpy_image[now_row, now_col, 1] = image[now_row, now_col, 1]\n",
    "        numpy_image[now_row, now_col, 2] = image[now_row, now_col, 2]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# 直接複製原來的圖片到一張新的圖片上\n",
    "copy_image = image.copy()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# 使用cvtColor獲取原圖片的副本\n",
    "cvtColor_image = cv2.cvtColor(image, cv2.COLOR_BGR2GRAY)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# 調整大小\n",
    "numpy_image = cv2.resize(numpy_image, (200, 400))\n",
    "copy_image = cv2.resize(copy_image, (numpy_image.shape[0], numpy_image.shape[1]))\n",
    "cvtColor_image = cv2.resize(cvtColor_image, None, fx=0.8, fy=1.2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# 顯示圖片\n",
    "cv2.imshow(\"image\", image)\n",
    "cv2.imshow(\"numpy_image\", numpy_image)\n",
    "cv2.imshow(\"copy_image\", copy_image)\n",
    "cv2.imshow(\"cvtColor_image\", cvtColor_image)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# 持續等待按鍵，並刷新\n",
    "cv2.waitKey(0)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# 關閉所有OpenCV視窗\n",
    "cv2.destroyAllWindows()"
   ]
  }
 ],
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  "kernelspec": {
   "display_name": "Python 3",
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