mirror of
https://github.com/Laex/Delphi-OpenCV.git
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392 lines
12 KiB
ObjectPascal
392 lines
12 KiB
ObjectPascal
(* / **************************************************************************************************
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// 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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// License:
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// The contents of this file are subject to the Mozilla Public License Version 1.1 (the "License");
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// you may not use this file except in compliance with the License. You may obtain a copy of the
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// License at http://www.mozilla.org/MPL/
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//
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// Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF
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// ANY KIND, either express or implied. See the License for the specific language governing rights
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// and limitations under the License.
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//
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// Alternatively, the contents of this file may be used under the terms of the
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// GNU Lesser General Public License (the "LGPL License"), in which case the
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// provisions of the LGPL License are applicable instead of those above.
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// If you wish to allow use of your version of this file only under the terms
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// of the LGPL License and not to allow others to use your version of this file
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// under the MPL, indicate your decision by deleting the provisions above and
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// replace them with the notice and other provisions required by the LGPL
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// License. If you do not delete the provisions above, a recipient may use
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// your version of this file under either the MPL or the LGPL License.
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//
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// For more information about the LGPL: http://www.gnu.org/copyleft/lesser.html
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// **************************************************************************************************
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// Warning: Using Delphi XE2 syntax!
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// **************************************************************************************************
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// The Initial Developer of the Original Code:
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// OpenCV: open source computer vision library
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// Homepage: http://opencv.org
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// Online docs: http://docs.opencv.org
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// Q&A forum: http://answers.opencv.org
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// Dev zone: http://code.opencv.org
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// ************************************************************************************************** *)
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{$POINTERMATH ON}
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unit cvUtils;
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interface
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Uses
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WinApi.Windows,
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core.types_c,
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Vcl.Graphics;
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Function hsv2rgb(hue: single): TCvScalar;
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procedure IplImage2Bitmap(iplImg: PIplImage; var bitmap: Vcl.Graphics.TBitmap);
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function cvImage2Bitmap(img: PIplImage): Vcl.Graphics.TBitmap;
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function ipDraw(dc: HDC; img: PIplImage; const rect: TRect; const Stretch: Boolean = true): Boolean; overload;
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procedure ipDraw(const x, y: Integer; const _Grab: PIplImage; const Wnd: THandle); overload;
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function CreateRGBBitmap(_Grab: PIplImage): HBITMAP;
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function c_str(const Text: String): pCVChar;
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function ifthen(const Cond: Boolean; const ValueTrue, ValueFalse: pCvArr): pCvArr; overload;
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function ifthen(const Cond: Boolean; const ValueTrue, ValueFalse: string): string; overload;
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function ifthen(const Cond: Boolean; const ValueTrue, ValueFalse: TCvScalar): TCvScalar; overload;
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implementation
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Uses
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System.SysUtils;
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function ifthen(const Cond: Boolean; const ValueTrue, ValueFalse: pCvArr): pCvArr; overload;
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begin
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if Cond then
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Result := ValueTrue
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else
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Result := ValueFalse;
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end;
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function ifthen(const Cond: Boolean; const ValueTrue, ValueFalse: string): string; overload;
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begin
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if Cond then
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Result := ValueTrue
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else
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Result := ValueFalse;
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end;
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function ifthen(const Cond: Boolean; const ValueTrue, ValueFalse: TCvScalar): TCvScalar; overload;
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begin
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if Cond then
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Result := ValueTrue
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else
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Result := ValueFalse;
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end;
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// ---------------------------------------------------------------------------
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> API <20><><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> RGB <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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// ---------------------------------------------------------------------------
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function CreateRGBBitmap(_Grab: PIplImage): HBITMAP;
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function WIDTHBYTES(bits: DWORD): DWORD; inline;
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begin
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result := ((((bits) + 31) div 32) * 4);
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end;
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Var
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lpbi : TBitmapInfo;
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App : pByte;
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pBits: Pointer;
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i, j : Integer;
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begin
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lpbi.bmiHeader.biSize := SizeOf(BITMAPINFOHEADER);
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lpbi.bmiHeader.biWidth := _Grab^.width;
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lpbi.bmiHeader.biHeight := _Grab^.height;
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lpbi.bmiHeader.biPlanes := 1;
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lpbi.bmiHeader.biBitCount := 24;
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lpbi.bmiHeader.biCompression := BI_RGB;
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lpbi.bmiHeader.biSizeImage := WIDTHBYTES(_Grab^.width * 8) * _Grab^.height;
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lpbi.bmiHeader.biXPelsPerMeter := 0;
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lpbi.bmiHeader.biYPelsPerMeter := 0;
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lpbi.bmiHeader.biClrUsed := 0;
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lpbi.bmiHeader.biClrImportant := 0;
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result := CreateDIBSection(
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0,
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lpbi,
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DIB_RGB_COLORS,
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pBits,
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0,
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0);
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if result <> 0 then
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begin
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App := pBits;
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if (_Grab^.nChannels = 1) then // <20><><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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begin
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for i := 0 to _Grab^.height - 1 do
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begin
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for j := 0 to _Grab^.width - 1 do
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begin
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App[_Grab^.width * 3 * (_Grab^.height - i - 1) + j * 3] := _Grab^.imageData[_Grab^.width * (i) + j];
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App[_Grab^.width * 3 * (_Grab^.height - i - 1) + j * 3 + 1] := _Grab^.imageData[_Grab^.width * (i) + j];
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App[_Grab^.width * 3 * (_Grab^.height - i - 1) + j * 3 + 2] := _Grab^.imageData[_Grab^.width * (i) + j];
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end;
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end;
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end;
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if (_Grab^.nChannels = 3) then // <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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begin
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for i := 0 to _Grab^.height - 1 do
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begin
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CopyMemory(
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App + _Grab^.width * 3 * (_Grab^.height - i - 1),
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_Grab^.imageData + _Grab^.width * 3 * i,
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_Grab^.width * 3);
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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end;
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end;
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end;
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end;
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// ---------------------------------------------------------------------------
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// ---------------------------------------------------------------------------
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// <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><> HANDLE <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <20><><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD>
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// ---------------------------------------------------------------------------
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procedure ipDraw(const x, y: Integer; const _Grab: PIplImage; const Wnd: THandle); overload;
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Var
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hMemDC, dc: HDC;
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bitmap : HBITMAP;
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begin
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dc := GetDC(Wnd);
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hMemDC := CreateCompatibleDC(dc);
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bitmap := CreateRGBBitmap(_Grab);
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SelectObject(
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hMemDC,
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bitmap);
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BitBlt(
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dc,
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x,
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y,
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_Grab^.width,
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_Grab^.height,
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hMemDC,
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0,
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0,
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SRCCOPY);
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DeleteObject(bitmap);
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DeleteDC(hMemDC);
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DeleteDC(dc);
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end;
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function c_str(const Text: String): pCVChar;
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begin
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result := pCVChar(@(AnsiString(Text)[1]));
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end;
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Function hsv2rgb(hue: single): TCvScalar;
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var
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rgb : array [0 .. 2] of Integer;
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p, sector: Integer;
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const
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sector_data: array [0 .. 5, 0 .. 2] of Integer = ((0, 2, 1), (1, 2, 0), (1, 0, 2), (2, 0, 1), (2, 1, 0), (0, 1, 2));
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Begin
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hue := hue * 0.033333333333333333333333333333333;
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sector := cvFloor(hue);
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p := cvRound(255 * (hue - sector));
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if (sector and 1) = 1 then
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p := 255
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else
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p := 0;
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rgb[sector_data[sector][0]] := 255;
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rgb[sector_data[sector][1]] := 0;
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rgb[sector_data[sector][2]] := p;
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result := cvScalar(
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rgb[2],
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rgb[1],
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rgb[0],
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0);
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End;
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{ -----------------------------------------------------------------------------
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Procedure: IplImage2Bitmap
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Author: De Sanctis
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Date: 23-set-2005
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Arguments: iplImg: PIplImage; bitmap: TBitmap
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Description: convert a IplImage to a Windows bitmap
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----------------------------------------------------------------------------- }
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procedure IplImage2Bitmap(iplImg: PIplImage; var bitmap: Vcl.Graphics.TBitmap);
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VAR
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i, j : Integer;
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offset : longint;
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dataByte, RowIn: PByteArray;
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channelsCount : Integer;
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BEGIN
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TRY
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// assert((iplImg.Depth = 8) and (iplImg.NChannels = 3),
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// 'IplImage2Bitmap: Not a 24 bit color iplImage!');
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bitmap.height := iplImg.height;
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bitmap.width := iplImg.width;
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FOR j := 0 TO bitmap.height - 1 DO
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BEGIN
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// origin BL = Bottom-Left
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if (iplImg.Origin = IPL_ORIGIN_BL) then
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RowIn := bitmap.Scanline[bitmap.height - 1 - j]
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else
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RowIn := bitmap.Scanline[j];
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offset := longint(iplImg.imageData) + iplImg.WidthStep * j;
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dataByte := PByteArray(offset);
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if (iplImg.ChannelSeq = 'BGR') then
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begin
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{ direct copy of the iplImage row bytes to bitmap row }
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CopyMemory(
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RowIn,
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dataByte,
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iplImg.WidthStep);
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End
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else if (iplImg.ChannelSeq = 'GRAY') then
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FOR i := 0 TO bitmap.width - 1 DO
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begin
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RowIn[3 * i] := dataByte[i];
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RowIn[3 * i + 1] := dataByte[i];
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RowIn[3 * i + 2] := dataByte[i];
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End
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else
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FOR i := 0 TO 3 * bitmap.width - 1 DO
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begin
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RowIn[i] := dataByte[i + 2];
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RowIn[i + 1] := dataByte[i + 1];
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RowIn[i + 2] := dataByte[i];
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End;
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End;
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Except
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End
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END; { IplImage2Bitmap }
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function cvImage2Bitmap(img: PIplImage): Vcl.Graphics.TBitmap;
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var
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info : string;
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bmp : Vcl.Graphics.TBitmap;
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deep : Integer;
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i, j, K, wStep, Channels: Integer;
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data : PByteArray;
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pb : PByteArray;
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begin
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result := NIL;
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if (img <> NIL) then
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begin
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bmp := Vcl.Graphics.TBitmap.Create;
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bmp.width := img^.width;
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bmp.height := img^.height;
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deep := img^.nChannels * img^.depth;
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case deep of
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8:
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bmp.PixelFormat := pf8bit;
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16:
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bmp.PixelFormat := pf16bit;
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24:
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bmp.PixelFormat := pf24bit;
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32:
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bmp.PixelFormat := pf32bit;
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End;
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wStep := img^.WidthStep;
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Channels := img^.nChannels;
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data := Pointer(img^.imageData);
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for i := 0 to img^.height - 1 do
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begin
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pb := bmp.Scanline[i];
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for j := 0 to img^.width - 1 do
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begin
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for K := 0 to Channels - 1 do
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pb[3 * j + K] := data[i * wStep + j * Channels + K]
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End;
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End;
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result := bmp;
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// bmp.Free;
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End;
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end;
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function ipDraw(dc: HDC; img: PIplImage; const rect: TRect; const Stretch: Boolean = true): Boolean;
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Type
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pCOLORREF = ^COLORREF;
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pBITMAPINFOHEADER = ^BITMAPINFOHEADER;
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Var
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isrgb : Boolean;
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isgray : Boolean;
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buf : array [1 .. SizeOf(BITMAPINFOHEADER) + SizeOf(RGBQUAD) * 256] of byte;
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dibhdr : pBITMAPINFOHEADER;
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_dibhdr: TBitmapInfo ABSOLUTE buf;
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_rgb : pCOLORREF;
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i : Integer;
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begin
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if (not Assigned(img)) or (not Assigned(img^.imageData)) then
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Exit(false);
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isrgb := ('R' = upcase(img^.colorModel[0])) and ('G' = upcase(img^.colorModel[1])) and
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('B' = upcase(img^.colorModel[2]));
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isgray := 'G' = upcase(img^.colorModel[0]);
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if (not isgray) and (not isrgb) then
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Exit(false);
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if (1 = img^.nChannels) and (not isgray) then
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Exit(false);
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dibhdr := @buf;
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_rgb := pCOLORREF(Integer(dibhdr) + SizeOf(BITMAPINFOHEADER));
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if (isgray) then
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for i := 0 to 255 do
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_rgb[i] := rgb(
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i,
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i,
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i);
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dibhdr^.biSize := SizeOf(BITMAPINFOHEADER);
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dibhdr^.biWidth := img^.width;
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// Check origin for display
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if img^.Origin = 0 then
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dibhdr^.biHeight := -img^.height
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else
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dibhdr^.biHeight := img^.height;
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dibhdr^.biPlanes := 1;
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dibhdr^.biBitCount := 8 * img^.nChannels;
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dibhdr^.biCompression := BI_RGB;
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dibhdr^.biSizeImage := 0; // img^.imageSize;
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dibhdr^.biXPelsPerMeter := 0;
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dibhdr^.biYPelsPerMeter := 0;
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dibhdr^.biClrUsed := 0;
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dibhdr^.biClrImportant := 0;
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if Stretch then
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begin
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SetStretchBltMode(
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dc,
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COLORONCOLOR);
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// Stretch the image to fit the rectangle
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result := StretchDIBits(dc, rect.left, rect.top, rect.width, rect.height, 0, 0, img^.width, img^.height,
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img^.imageData, _dibhdr, DIB_RGB_COLORS, SRCCOPY) > 0;
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end
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else
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// Draw without scaling
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result := SetDIBitsToDevice(dc, rect.left, rect.top, img^.width, img^.height, 0, 0, 0, img^.height, img^.imageData,
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_dibhdr, DIB_RGB_COLORS) > 0;
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end;
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end.
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