"Exercise 5.9" image mask, hat, cvcopy, image fusion, Cvcvtcolor

Outline

Topic Requirements

Program code

Result picture

Homilies Miao DAO

Title Requirements:

Read a landscape view and convert it into a grayscale image

A, the image of the morphological "hat" operation, and display the results

B. Convert the resulting image to a 8-bit mask

C, copy the gray value to the top hat block, display the results → I understand that the results of question A and B are combined into a picture

Program code:

1 //OpenCVExerciseTesting.cpp: Defines the entry point of the console application. 2 //3 //d:\\work\\work_programming\\source\\image\\lena.jpg4 5 6#include"stdafx.h"7#include <cv.h>8#include 9#include <iostream>Ten using namespaceCV; One using namespacestd; A  - //function declaration---->-->--->-->--->-->--->// -  the //<--<--<--<--<--<--<--<--<--Function Declaration// -  -  - int_tmain (intARGC, _tchar*argv[]) + { -     Const Char* FileName1 ="d:\\work\\work_programming\\source\\image\\opencvexerciseimage\\ 5th chapter \ \ landscape. jpg"; +Iplimage * Src1 =cvloadimage (fileName1, cv_load_image_unchanged); A assert (SRC1); at        -Cvnamedwindow ("Original Image",0);  -Cvnamedwindow ("Topic _a",0); -Cvnamedwindow ("Topic _b",0); -Cvnamedwindow ("Topic _c",0); -  inIplimage * Img_gray = Cvcreateimage (Cvsize (Src1->width, Src1->height), ipl_depth_8u,1); -      to     //before using Cvcvtcolor and cvcopy These functions, you should validate the parameters before using them. +     if(Src1->nchannels! =3) -     { thecout <<"the loaded image must be a color picture"<<Endl; *         return 0; $     }Panax Notoginseng      - Cvcvtcolor (Src1, Img_gray, Cv_rgb2gray); the  +Cvshowimage ("Original Image", Img_gray); A       the     //---------------------------A: Start--------------------------------// +  -  $Iplimage * Imgcopy =cvcloneimage (img_gray); $ Cvzero (imgcopy); -  -Iplconvkernel * kernel = Cvcreatestructuringelementex (3,3,1,1, cv_shape_rect); theCvmorphologyex (Img_gray, imgcopy, NULL, kernel, cv_mop_tophat,6); - WuyiCvshowimage ("Topic _a", imgcopy); the  -     //---------------------------A: End--------------------------------//     Wu  -     //---------------------------B: Start--------------------------------// About  $  -Iplimage * Imgcopy_b =cvcloneimage (img_gray); - Cvzero (imgcopy_b); -  ACvthreshold (Imgcopy, Imgcopy_b, -,255, cv_thresh_binary); +  theCvshowimage ("Topic _b", imgcopy_b); -  $     //---------------------------B: End--------------------------------//     the  the     //---------------------------C: Start--------------------------------// the  the  -Iplimage * Imgcopy_c =cvcloneimage (imgcopy); in     //Cvzero (Imgcopy_c); the  the cvcopy (Imgcopy_b, Imgcopy_c, imgcopy_b); About  theCvshowimage ("Topic _c", Imgcopy_c); the  the     //---------------------------C: End--------------------------------//     +  -Cvwaitkey (0); the BayiCvreleaseimage (&src1); theCvreleaseimage (&imgcopy); theCvreleaseimage (&imgcopy_b); -Cvreleaseimage (&Imgcopy_c); -  theCvdestroywindow ("Original Image");  theCvdestroywindow ("Topic _a"); theCvdestroywindow ("Topic _b"); theCvdestroywindow ("Topic _c"); -  the     return 0; the } the   

Result Picture:

Homilies Miao DAO:

① use Cvcvtcolor, cvcopy and other functions, pay attention to verify the validity of the input picture, otherwise it will error, for example:

1     //before using Cvcvtcolor and cvcopy These functions, you should validate the parameters before using them.2     if(Src1->nchannels! =3)3     {4cout <<"the loaded image must be a color picture"<<Endl;5         return 0;6     }7     8Cvcvtcolor (Src1, Img_gray, Cv_rgb2gray);

② Making a mask image is actually a binary image

③ can use cvcopy for image fusion, using the third parameter

④ hats and Black hats: These actions are used to separate patches that are lighter or darker than the neighboring ones. So, can be used to implement similar Cognex-like Cogblobtool function, OpenCV has similar description of the result of the blob: cvconnectedcomponent

"Exercise 5.9" image mask, hat, cvcopy, image fusion, Cvcvtcolor