灰度变化与增强.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import cv2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [],
   "source": [
    "img=cv2.imread('images/Test_1000.jpg')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [],
   "source": [
    "img=cv2.resize(img,(500,500))\n",
    "gray=cv2.cvtColor(img,cv2.COLOR_BGR2GRAY)\n",
    "cv2.imshow('gray',gray)\n",
    "cv2.waitKey(0)\n",
    "cv2.destroyAllWindows()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [],
   "source": [
    "ret,im_fixed=cv2.threshold(gray,50,255,cv2.THRESH_BINARY)\n",
    "cv2.imshow('im',im_fixed)\n",
    "cv2.waitKey(0)\n",
    "cv2.destroyAllWindows()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [],
   "source": [
    "import copy\n",
    "gamma=copy.deepcopy(gray)\n",
    "cv2.imshow('im',gamma)\n",
    "cv2.waitKey(0)\n",
    "cv2.destroyAllWindows()\n",
    "rows=img.shape[0]\n",
    "cols=img.shape[1]\n",
    "for i in range(rows):\n",
    "    for j in range(cols):\n",
    "        gamma[i][j]=3*pow(gamma[i][j],0.8)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "metadata": {},
   "outputs": [],
   "source": [
    "cv2.imshow('im',gamma)\n",
    "cv2.waitKey(0)\n",
    "cv2.destroyAllWindows()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "metadata": {},
   "outputs": [],
   "source": [
    "\n",
    "cover=copy.deepcopy(gray)\n",
    "for i in range(rows):\n",
    "    for j in range(cols):\n",
    "        cover[i][j]=255-cover[i][j]\n",
    "cv2.imshow('im',cover)\n",
    "cv2.waitKey(0)\n",
    "cv2.destroyAllWindows()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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