mirror of
https://github.com/Laex/Delphi-OpenCV.git
synced 2024-11-15 15:55:53 +01:00
118 lines
3.4 KiB
ObjectPascal
118 lines
3.4 KiB
ObjectPascal
//*****************************************************************
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// Delphi-OpenCV Demo
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// Copyright (C) 2013 Project Delphi-OpenCV
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// ****************************************************************
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// Contributor:
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// Laentir Valetov
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// email:laex@bk.ru
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// ****************************************************************
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// You may retrieve the latest version of this file at the GitHub,
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// located at git://github.com/Laex/Delphi-OpenCV.git
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// ****************************************************************
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// The contents of this file are used with permission, subject to
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// the Mozilla Public License Version 1.1 (the "License"); you may
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// not use this file except in compliance with the License. You may
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// obtain a copy of the License at
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// http://www.mozilla.org/MPL/MPL-1_1Final.html
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//
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// Software distributed under the License is distributed on an
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// "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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// implied. See the License for the specific language governing
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// rights and limitations under the License.
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//*******************************************************************
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program fback_c;
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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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ocv.highgui_c,
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ocv.core_c,
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ocv.core.types_c,
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ocv.imgproc_c,
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ocv.imgproc.types_c,
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ocv.tracking_c;
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procedure drawOptFlowMap(const flow: pCvMat; cflowmap: pCvMat; step: Integer; scale: double; color: TCvScalar);
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var
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x, y: Integer;
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fxy: TCvPoint2D32f;
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begin
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y := 0;
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While y < cflowmap^.rows do
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begin
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x := 0;
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while x < cflowmap^.cols do
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begin
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fxy := pCvPoint2D32f(CV_MAT_ELEM(flow^, SizeOf(TCvPoint2D32f), y, x))^;
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cvLine(cflowmap, cvPoint(x, y), cvPoint(cvRound(x + fxy.x), cvRound(y + fxy.y)), color, 1, 8, 0);
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cvCircle(cflowmap, cvPoint(x, y), 2, color, -1, 8, 0);
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x := x + step;
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end;
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y := y + step;
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end;
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end;
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Var
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capture: pCvCapture;
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prevgray: pCvMat = nil;
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gray: pCvMat = nil;
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flow: pCvMat = nil;
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cflow: pCvMat = nil;
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firstFrame: boolean;
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frame: pIplImage;
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temp: pCvMat;
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begin
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try
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Writeln(' This program demonstrate dense Farneback optical flow');
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Writeln('It read from camera 0, and shows how to use and display dense Franeback optical flow');
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Writeln('Usage: ');
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Writeln('fback_c ');
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capture := cvCreateCameraCapture(0);
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Assert(Assigned(capture));
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cvNamedWindow('flow', 1);
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while true do
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begin
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firstFrame := Assigned(gray);
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frame := cvQueryFrame(capture);
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Assert(Assigned(frame));
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if not Assigned(gray) then
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begin
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gray := cvCreateMat(frame^.height, frame^.width, CV_8UC1);
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prevgray := cvCreateMat(gray^.rows, gray^.cols, gray^._type);
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flow := cvCreateMat(gray^.rows, gray^.cols, CV_32FC2);
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cflow := cvCreateMat(gray^.rows, gray^.cols, CV_8UC3);
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end;
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cvCvtColor(frame, gray, CV_BGR2GRAY);
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if firstFrame then
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begin
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cvCalcOpticalFlowFarneback(prevgray, gray, flow, 0.5, 3, 15, 3, 5, 1.2, 0);
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cvCvtColor(prevgray, cflow, CV_GRAY2BGR);
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drawOptFlowMap(flow, cflow, 16, 1.5, CV_RGB(0, 255, 0));
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cvShowImage('flow', cflow);
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end;
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if (cvWaitKey(10) = 27) then
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break;
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CV_SWAP(prevgray, gray, temp);
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end;
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cvReleaseCapture(capture);
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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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