Example 3-12 ...... Example 3-15 opencv

// Example 3-12 use imageroi to increase the pixel value in a certain range </P> <p> # include "stdafx. H "<br/> # include <cv. h> <br/> # include <pighgui. h> </P> <p> int main (INT argc, char ** argv) <br/>{< br/> iplimage * SRC; <br/> If (argc = 7 & (src = cvloadimage (argv [1], 1 ))! = 0) <br/>{< br/> int x = atoi (argv [2]); <br/> int y = atoi (argv [3]); <br/> int width = atoi (argv [4]); <br/> int Height = atoi (argv [5]); <br/> int add = atoi (argv [6]); <br/> cvsetimageroi (SRC, cvrect (X, Y, width, height )); <br/> cvadds (SRC, cvscalar (ADD), Src); <br/> cvresetimageroi (SRC); <br/> cvnamedwindow ("roi_add", 1 ); <br/> cvshowimage ("roi_add", Src); <br/> cvwaitkey (0); <br/>}< br/> return 0; <br/>}< br/> Note: </P> <p> the input parameter is D: /try0621/3-12/debug> 3-12.exe B .jpg 660 180 100 100 150 </P> <p> // another method for increasing the pixel value in 3-13 Examples </P> <p> # include "stdafx. H "<br/> # include <cv. h> <br/> # include <pighgui. h> </P> <p> int main (INT argc, char ** argv) <br/> {<br/> cvnamedwindow ("ha "); <br/> iplimage * interest_img = cvloadimage (argv [1], 1); <br/> cvshowimage ("interest_img", interest_img ); <br/> cvrect interest_rect = cvrect (300,500,200,200); <br/> iplimage * sub_img = Cvcreateimageheader (cvsize (bytes, interest_rect.height), interest_img-> depth, interest_img-> nchannels); <br/> // cvshowimage ("sub_img", sub_img ); // This is not suitable for output. <br/> sub_img-> origin = interest_img-> origin; <br/> sub_img-> widthstep = interest_img-> widthstep; <br/> sub_img-> imagedata = interest_img-> imagedata + interest_rect.y * interest_img-> widthstep + interest_rect.x * interest_img-> nchannels; printf ("her E "); <br/> cvadds (sub_img, cvscalar (50), sub_img); <br/> cvshowimage (" ", sub_img ); <br/> cvwaitkey (0); <br/> cvreleaseimageheader (& sub_img); <br/> cvreleaseimage (& interest_img); <br/> cvdestroywindow ("La "); <br/> return 0; <br/>}< br/> note: <br/> Add pixels </P> <p> // Example 3-14 </P> <p> # include "stdafx. H "<br/> # include <cv. h> <br/> # include <pighgui. h> </P> <p> int main (INT argc, char ** argv) <br/> {<br/> iplimage * src1, * s RC2; <br/> // If (argc = 9 & (src1 = cvloadimage (argv [1], 1 ))! = 0) & (src2 = cvloadimage (argv [2], 1 ))! = 0) <br/>{< br/> src1 = cvloadimage (argv [1], 1); <br/> src2 = cvloadimage (argv [2], 1); <br/> // int x = atoi (argv [3]); <br/> // int y = atoi (argv [4]); <br/> // int width = atoi (argv [5]); // 200 <br/> // int Height = atoi (argv [6]); // 100 <br/> // double alpha = (double) atof (argv [7]); <br/> // double Beta = (double) atof (argv [8]); <br/> cvsetimageroi (src1, cvrect (500,350,280,150); <br/> cvsetimageroi (src2, cvrect (380,190,280,150); <br/> Cvaddweighted (src1, 0.3, src2, 0.7, 0.0, src1); <br/> cvresetimageroi (src1); <br/> cvnamedwindow ("alpha_blend", 1 ); <br/> cvshowimage ("alpha_blend", src1); <br/> cvwaitkey (); <br/>}< br/> return 0; <br/>}< br/> // another exercise <br/> int main (INT argc, char ** argv) <br/>{< br/> cvnamedwindow ("image superposition", 1); <br/> iplimage * src1, * src2; // src1 = src1 + src2. The ROI must be the same size </P> <p> src1 = cvloadimage (argv [1], 1); <br/> cvsetimageroi (src1, cvrect (400,300,280,150); // Covered Area <br/> cvshowimage ("src1", src1 ); </P> <p> src2 = cvloadimage (argv [2], 1); <br/> cvsetimageroi (src2, cvrect (380,190,280,150 )); // Filled Area <br/> cvshowimage ("src2", src2); </P> <p> cvaddweighted (src1, 0.3, src2, 0.7, 0.0, src1); <br/> cvresetimageroi (src1); <br/> cvshowimage ("generated target image", src1); </P> <p> cvwaitkey (0 ); <br/> r Eturn 0; <br/>}</P> <p> note: </P> <p> it is very difficult to find the desired region. <br/> cvrect (horizontal axis of the start point, vertical axis of the start point, width, and height) <br/> cvaddweighted (addition 1, addition 1 coefficient, Addition 2, Addition 2 coefficient, gamma, generated target image) <br/> the generated target image is generally a addition of 1 </P> <p> // Example 3-15 store and read cvmat-use XML files </P> <p> // 3-15 store and read cvmat. CPP: defines the entry point of the console application. <Br/> // </P> <p> # include "stdafx. H "<br/> # include <cv. h> <br/> # include <pighgui. h> </P> <p> int main (INT argc, char ** argv) <br/> {<br/> float the_matrix_data [] = {1, 2, 3, 4, ,}; <br/> cvmat A = cvmat (, cv_32f, the_matrix_data); <br/> cvsave ("my_matrix.xml ", & A); </P> <p> cvmat * a1 = (cvmat *) cvload ("my_matrix.xml"); </P> <p> printf ("% F ", cvget2d (A1, 1, 1); <br/> return 0; <br/>}</P> <p> // generated XML file Parts: <br/> <? XML version = "1.0"?> <Br/> <opencv_storage> <br/> <my_matrix type_id = "opencv-matrix"> <br/> <rows> 4 </rows> <br/> <Cols> 4 </Cols> <br/> <DT> F </DT> <br/> <DATA> <br/> 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. <br/> </data> <br/> </my_matrix> <br/> </opencv_storage> </P> <p> Notes: </P> <p> I hope to learn XML <br/>.