mirror of
https://github.com/Laex/Delphi-OpenCV.git
synced 2024-11-15 15:55:53 +01:00
96 lines
2.7 KiB
ObjectPascal
96 lines
2.7 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 cv_CreateTrackbar;
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{$APPTYPE CONSOLE}
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{$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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uResourcePaths;
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const
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filename = cResourceMedia + '768x576.avi';
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var
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capture: pCvCapture = nil;
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frame: pIplImage = nil;
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framesCount: Double;
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frames: Integer;
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currentPosition: Integer;
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c: Integer;
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// ôóíêöèÿ-îáðàáîò÷èê ïîëçóíêà -
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// ïåðåìàòûâàåò íà íóæíûé êàäð
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procedure myTrackbarCallback(pos: Integer); cdecl;
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begin
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cvSetCaptureProperty(capture, CV_CAP_PROP_POS_FRAMES, pos);
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end;
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begin
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try
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// îêíî äëÿ îòîáðàæåíèÿ êàðòèíêè
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cvNamedWindow('original', CV_WINDOW_AUTOSIZE);
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// ïîëó÷àåì èíôîðìàöèþ î âèäåî-ôàéëå
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capture := cvCreateFileCapture(filename);
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// ïîëó÷àåì ÷ècëî êàäðîâ
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framesCount := cvGetCaptureProperty(capture, CV_CAP_PROP_FRAME_COUNT);
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Writeln('[i] count: ', framesCount);
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frames := Trunc(framesCount);
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currentPosition := 0;
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if (frames <> 0) then
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// ïîêàçûâàåì ïîëçóíîê
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cvCreateTrackbar('Position', 'original', @currentPosition, frames, myTrackbarCallback);
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while True do
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begin
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// ïîëó÷àåì cëåäóþùèé êàäð
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frame := cvQueryFrame(capture);
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if not Assigned(frame) then
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Break;
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// çäåcü ìîæíî âcòàâèòü
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// ïðîöåäóðó îáðàáîòêè
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// ïîêàçûâàåì êàäð
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cvShowImage('original', frame);
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c := cvWaitKey(33);
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if (c = 27) then
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Break; // åcëè íàæàòà ESC - âûõîäèì
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end;
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// îcâîáîæäàåì ðåcóðcû
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cvReleaseCapture(capture);
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// óäàëÿåì îêíî
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cvDestroyWindow('original');
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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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