OpenCV3_Image_operations_and_arithematic.ipynb

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 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [],
   "source": [
    "import cv2\n",
    "import numpy as np"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Image Operations"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
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     ]
    }
   ],
   "source": [
    "img= cv2.imread('watch.jpg', 1)\n",
    "\n",
    "roi=img[1000,800]\n",
    "print(roi)\n",
    "roi= img[200:350, 200:350]\n",
    "print(roi)\n",
    "\n",
    "img[200:350, 200:350]=[255,255,255]\n",
    "cv2.imshow('Image',img)\n",
    "cv2.waitKey(0)\n",
    "cv2.destroyAllWindows()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Crating a copy of a portion"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [],
   "source": [
    "img= cv2.imread('watch.jpg', 1)\n",
    "\n",
    "roi= img[200:700, 250:900]\n",
    "img[0:500,0:650]=roi\n",
    "\n",
    "cv2.imshow('Copy Portion Image',img)\n",
    "cv2.waitKey(0)\n",
    "cv2.destroyAllWindows()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Image Arithematic"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [],
   "source": [
    "img1= cv2.imread('scatterplot2.jpg', 1)\n",
    "img2= cv2.imread('jvyv1.png', 1)\n",
    "\n",
    "#Resizing the image\n",
    "img1= cv2.resize(img1, (600,600), interpolation= cv2.INTER_CUBIC)\n",
    "img2= cv2.resize(img2, (600,600), interpolation= cv2.INTER_CUBIC)\n",
    "\n",
    "add= img1+img2\n",
    "\n",
    "cv2.imshow('Added Image',add)\n",
    "cv2.waitKey(0)\n",
    "cv2.destroyAllWindows()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [],
   "source": [
    "#Using cv2.add() function\n",
    "img1= cv2.imread('scatterplot2.jpg', 1)\n",
    "img2= cv2.imread('jvyv1.png', 1)\n",
    "\n",
    "#Resizing the image\n",
    "img1= cv2.resize(img1, (600,600), interpolation= cv2.INTER_CUBIC)\n",
    "img2= cv2.resize(img2, (600,600), interpolation= cv2.INTER_CUBIC)\n",
    "\n",
    "add= cv2.add(img1, img2)\n",
    "\n",
    "cv2.imshow('Added Image',add)\n",
    "cv2.waitKey(0)\n",
    "cv2.destroyAllWindows()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [],
   "source": [
    "#Using addWeighted() function\n",
    "img1= cv2.imread('scatterplot2.jpg', 1)\n",
    "img2= cv2.imread('jvyv1.png', 1)\n",
    "\n",
    "#Resizing the image\n",
    "img1= cv2.resize(img1, (600,600), interpolation= cv2.INTER_CUBIC)\n",
    "img2= cv2.resize(img2, (600,600), interpolation= cv2.INTER_CUBIC)\n",
    "\n",
    "add= cv2.addWeighted(img1, 0.6, img2, 0.4, 0)\n",
    "\n",
    "cv2.imshow('Added Image',add)\n",
    "cv2.waitKey(0)\n",
    "cv2.destroyAllWindows()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Add an Image to Another Image "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "metadata": {},
   "outputs": [],
   "source": [
    "img1= cv2.imread('jvyv1.png', 1)\n",
    "img2= cv2.imread('python-logo.png', 1)\n",
    "\n",
    "img1= cv2.resize(img1, (1224,1624), interpolation= cv2.INTER_CUBIC)\n",
    "\n",
    "rows, columns, channel= img2.shape\n",
    "roi= img1[0:rows,0:columns]\n",
    "\n",
    "img2gray= cv2.cvtColor(img2, cv2.COLOR_BGR2GRAY)\n",
    "\n",
    "#thresholding the logo image\n",
    "ret, mask= cv2.threshold(img2gray, 220, 255, cv2.THRESH_BINARY_INV)\n",
    "cv2.imshow('Thresholded Image',mask)\n",
    "\n",
    "mask_inv= cv2.bitwise_not(mask)\n",
    "cv2.imshow('Mask INV Image',mask_inv)\n",
    "\n",
    "img1_bg= cv2.bitwise_and(roi, roi, mask=mask_inv)\n",
    "cv2.imshow('Image 1 Background',img1_bg)\n",
    "\n",
    "img2_fg= cv2.bitwise_and(img2, img2, mask=mask)\n",
    "cv2.imshow('Image 2 Foreground',img2_fg)\n",
    "\n",
    "dst= cv2.add(img1_bg, img2_fg)\n",
    "img1[0:rows,0:columns]= dst\n",
    "\n",
    "cv2.imshow('Logo Image before adding', dst)\n",
    "cv2.imshow('Added Image',img1)\n",
    "cv2.waitKey(0)\n",
    "cv2.destroyAllWindows()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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