mirror of
https://github.com/Laex/Delphi-OpenCV.git
synced 2024-11-16 08:15:52 +01:00
fde0aa2f53
LibTest [+] cv_CalcOpticalFlowPyrLK [+] cv_SnakeImage MultiDemo [+] CameraShift [+] Squares Signed-off-by: Laex <laex@bk.ru>
88 lines
2.6 KiB
ObjectPascal
88 lines
2.6 KiB
ObjectPascal
// JCL_DEBUG_EXPERT_GENERATEJDBG OFF
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// JCL_DEBUG_EXPERT_INSERTJDBG OFF
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// JCL_DEBUG_EXPERT_DELETEMAPFILE OFF
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program cv_WarpPerspective;
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{$APPTYPE CONSOLE}
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{$POINTERMATH ON}
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{$R *.res}
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uses
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System.SysUtils,
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{$I ..\..\uses_include.inc}
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;
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const
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filename = 'resource\opencv_logo_with_text.png';
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Var
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src: pIplImage = nil;
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dst: pIplImage = nil;
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srcQuad, dstQuad: pCvPoint2D32f;
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warp_matrix: pCvMat;
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begin
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try
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// Ïîëó÷àåì êàðòèíêó (â ãðàäàöèÿõ ñåðîãî)
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src := cvLoadImage(filename, CV_LOAD_IMAGE_GRAYSCALE);
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WriteLn(Format('[i] image: %s', [filename]));
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cvNamedWindow('Original', CV_WINDOW_AUTOSIZE);
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cvShowImage('Original', src);
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// ìàòðèöà ïðåîáðàçîâàíèÿ
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warp_matrix := cvCreateMat(3, 3, CV_32FC1);
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// êëîíèðóåì êàðòèíêó
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dst := cvCloneImage(src);
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// çàäà¸ì òî÷êè
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srcQuad := AllocMem(SizeOf(TCvPoint2D32f) * 4);
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dstQuad := AllocMem(SizeOf(TCvPoint2D32f) * 4);
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srcQuad[0].x := 0; // src Top left
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srcQuad[0].y := 0;
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srcQuad[1].x := src.width - 1; // src Top right
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srcQuad[1].y := 0;
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srcQuad[2].x := 0; // src Bottom left
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srcQuad[2].y := src.height - 1;
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srcQuad[3].x := src.width - 1; // src Bot right
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srcQuad[3].y := src.height - 1;
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// - - - - - - - - - - - - - -//
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dstQuad[0].x := src.width * 0.05; // dst Top left
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dstQuad[0].y := src.height * 0.33;
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dstQuad[1].x := src.width * 0.9; // dst Top right
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dstQuad[1].y := src.height * 0.25;
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dstQuad[2].x := src.width * 0.2; // dst Bottom left
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dstQuad[2].y := src.height * 0.7;
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dstQuad[3].x := src.width * 0.8; // dst Bot right
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dstQuad[3].y := src.height * 0.9;
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// ïîëó÷àåì ìàòðèöó ïðåîáðàçîâàíèÿ
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cvGetPerspectiveTransform(srcQuad, dstQuad, warp_matrix);
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// ïðåîáðàçîâàíèå ïåðñïåêòèâû
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// CV_WARP_INVERSE_MAP — èñïîëüçóåòñÿ îáðàòíàÿ òðàíñôîðìàöèÿ èç dst â src
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// CV_WARP_FILL_OUTLIERS — çàïîëíèòü âñå ïèêñåëè öåëåâîãî èçîáðàæåíèÿ (åñëè ïèêñåëè îòñóòñòâóþò íà èñõîäíîì èçîáðàæåíè èñïîëüçóþòñÿ fillval)
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// fillval — çíà÷åíèå äëÿ çàïîëíåíèÿ ïèêñåëåé âíå èñõîäíîãî èçîáðàæåíèÿ
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cvWarpPerspective(src, dst, warp_matrix, CV_INTER_LINEAR or CV_WARP_FILL_OUTLIERS, cvScalarAll(0));
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// ïîêàçûâàåì
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cvNamedWindow('WarpPerspective', CV_LOAD_IMAGE_GRAYSCALE);
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cvShowImage('WarpPerspective', dst);
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// æä¸ì íàæàòèÿ êëàâèøè
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cvWaitKey(0);
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// îñâîáîæäàåì ðåñóðñû
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FreeMem(srcQuad);
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FreeMem(dstQuad);
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cvReleaseImage(src);
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cvReleaseImage(dst);
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cvReleaseMat(warp_matrix);
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cvDestroyAllWindows();
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except
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on E: Exception do
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WriteLn(E.ClassName, ': ', E.Message);
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end;
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end.
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