Cut image

[Marcelo Via Giglio]

Hello,

I need to read image from disk without displaying it, then cut some area and save these to disk in new file

some help I will appreciate

regards

Marcelo

[ukoenig]

Marcelo,

I don*t understand.
How do You want to save a area of a Image without Preview,
to select the Area ?

Best Regards
Uwe

[Marcelo Via Giglio]

Hello,

thanks for your response, I will try to be clear

I have a image in file, what I want is cut some area from this image and save cuted area to other image file, without show any thing. The area to cut (top, left...) will be parameters.


thanks in advance

Marcelo

[ukoenig]

Marcelo,

there is a command-line-tool < IMAGEMAGICK > Freeware
Download :
http://www.imagemagick.org/script/index.php

Read about using Crop-Commands :
http://www.imagemagick.org/Usage/crop/#trim



Best Regards
Uwe

[Daniel Garcia-Gil]

Marcelo

Ejemplo funcional

http://www.sitasoft.net/fivewin/samples/cutbmp.zip

Code: Select all | Expand

#include "fivewin.ch"


function main()

   local oWnd
   
   local hBmp := ReadBitmap( 0, "007.bmp" )
   local hCut := CutImage( 40, 40, 80, 80, hBmp )
   local hDib := DibFromBitmap( hCut )
   
   DibWrite( "test.bmp", hDib )
   
   DeleteObject( hDib )
   DeleteObject( hCut )
   DeleteObject( hBmp )
   

return nil


#pragma BEGINDUMP

#include <hbapi.h>
#include <windows.h>


HB_FUNC( CUTIMAGE )
{
   HDC hdc1, hdcSrc, hdcDest;
   HBITMAP hbmpSrc  = ( HBITMAP ) hb_parnl( 5 );
   HBITMAP hbmpDest, hold1, hold2;
   RECT rct;
   BITMAP bm;
   
   rct.top  = hb_parnl( 1 );
   rct.left = hb_parnl( 2 );
   rct.bottom = hb_parnl( 3 );
   rct.right  = hb_parnl( 4 );
   
   GetObject( ( HGDIOBJ ) hbmpSrc, sizeof( BITMAP ), ( LPSTR ) &bm );

   hdc1 = GetDC( GetDesktopWindow() );
   hdcSrc = CreateCompatibleDC( hdc1 );
   hdcDest = CreateCompatibleDC( hdc1 );

   hbmpDest = CreateCompatibleBitmap( hdc1, rct.right - rct.left, rct.bottom - rct.top );

   ReleaseDC( GetDesktopWindow(), hdc1 );
      
   hold1 = SelectObject( hdcSrc, hbmpSrc );
   hold2 = SelectObject( hdcDest, hbmpDest );
      
   BitBlt( hdcDest, 0, 0, rct.right, rct.bottom, hdcSrc, rct.left, rct.top, SRCCOPY );
   
   SelectObject( hdcSrc, hold1 );
   SelectObject( hdcDest, hold2 );
   
   DeleteDC( hdcSrc );
   DeleteDC( hdcDest );
   
   hb_retnl( ( LONG ) hbmpDest );
   
}
#pragma ENDDUMP
 

[Marcelo Via Giglio]

Daniel,

thanks very much, but I am trying to do the same but for JPG files, are there some function compatible with ReadBitmap but for JPG files?

Regards

Marcelo

[Daniel Garcia-Gil]

Marcelo

yes.. you can do it with any image format supported by freeimage

i did some changes in code and parameter

by suggestion y changed the function name to CropImage( hOriginalBmp, nTop, nLeft, nBottom, nRight ) --> hCroppedBmp
is already added to fivewin

Code: Select all | Expand

#include "fivewin.ch"


function main()

   CutImage( "007.bmp", "cut_007.bmp" )
   CutImage( "halo.gif", "cut_halo.bmp" )
   CutImage( "fivewin.png", "cut_five.bmp" )
   CutImage( "olga.bmp", "cut_olga.bmp" )

return nil

function CutImage( cNameIn, cNameOut )

   local hBmp := FiLoadImg( cNameIn )
   local hCut := CropImage( hBmp, 40, 40, 80, 80 )
   local hDib := DibFromBitmap( hCut )
   
   DibWrite( cNameOut, hDib )
   
   DeleteObject( hDib )
   DeleteObject( hCut )
   DeleteObject( hBmp )
   
return nil

#pragma BEGINDUMP

#include <hbapi.h>
#include <windows.h>

HB_FUNC( CROPIMAGE ) //hOriginalBmp, nTop, nLeft, nBottom, nRight --> hCroppedBmp
{
   HDC hdc1, hdcSrc, hdcDest;
   HBITMAP hbmpSrc  = ( HBITMAP ) hb_parnl( 1 );
   HBITMAP hbmpDest, hold1, hold2;
   RECT rct;
   BITMAP bm;

   GetObject( ( HGDIOBJ ) hbmpSrc, sizeof( BITMAP ), ( LPSTR ) &bm );
   
   rct.top    = hb_pcount() > 1 ? hb_parnl( 2 ) : 0;
   rct.left   = hb_pcount() > 2 ? hb_parnl( 3 ) : 0;
   rct.bottom = hb_pcount() > 3 ? hb_parnl( 4 ) : bm.bmHeight;
   rct.right  = hb_pcount() > 4 ? hb_parnl( 5 ) : bm.bmWidth;
   

   hdc1 = GetDC( GetDesktopWindow() );
   hdcSrc = CreateCompatibleDC( hdc1 );
   hdcDest = CreateCompatibleDC( hdc1 );

   hbmpDest = CreateCompatibleBitmap( hdc1, rct.right - rct.left, rct.bottom - rct.top );

   ReleaseDC( GetDesktopWindow(), hdc1 );
      
   hold1 = SelectObject( hdcSrc, hbmpSrc );
   hold2 = SelectObject( hdcDest, hbmpDest );
      
   BitBlt( hdcDest, 0, 0, rct.right, rct.bottom, hdcSrc, rct.left, rct.top, SRCCOPY );
   
   SelectObject( hdcSrc, hold1 );
   SelectObject( hdcDest, hold2 );
   
   DeleteDC( hdcSrc );
   DeleteDC( hdcDest );
   
   hb_retnl( ( LONG ) hbmpDest );
   
}
#pragma ENDDUMP
 
 

[Marcelo Via Giglio]

Daniel,

tranks, this work perfectly, I need some help more, because I am making some preprocessing before crop the image I need to translate some code to read a JPG file, the next is sample

Code: Select all | Expand

   LOCAL hBmp   := oImage:hBitmap
   LOCAL hDc    := GetDc(hBmp)
   local hDCMem := CreateCompatibleDC( hDC )
   local hOldBmp:= SelectObject( hDCMem, hBmp )
   local nX     := oImage:nWidth
   local nY     := oImage:nHeight
 

this work with image object, but I need to work without it, then I need to replace hBmp := oImage:hBitmap, maybe hBmp := FiLoadImg( cNameIn ), but how can I get the width and height

regards

Marcelo

[Daniel Garcia-Gil]

Hello

http://wiki.fivetechsoft.com/doku.php?id=fivewin_function_nbmpheight

http://wiki.fivetechsoft.com/doku.php?id=fivewin_function_nbmpwidth

[Marcelo Via Giglio]

Daniel,

really I appreciate your help, all work perfectly, one help more sorry how can I save the cropping image to a other file format like JPG

muchas gracias

Marcelo

[Daniel Garcia-Gil]

Hello

i dont know if this feature is supported by freeimage, for now is only BMP using fivewin

[ukoenig]

Daniel,

Imagemagick Command-line-tool uses freeimage.dll but is easy to use
You can convert between different formats adding any options.
It is not possible, to cover all combinations/options with FWH
I*m working on a Visual-command-line-tool, to test everything at Runtime

Some samples :

Resize JPG to 25% and save as Bmp
WAITRUN ( ( "convert fantasy2.jpg -resize 25% resize.bmp", 0 )



Resize JPG to 25% and save as Bmp with Border
WAITRUN ( ( "convert fantasy2.jpg -resize 25% -mattecolor SkyBlue -frame 6x6+2+2 frame1.bmp", 0 )



Crop JPG and save as Bmp with border
WAITRUN ( ( "convert fantasy2.jpg -crop 400x400+0+0 -frame 10x10+6+0 crop1.bmp", 0 )



Crop JPG and save as Bmp with another border-style
WAITRUN ( ( "convert fantasy2.jpg -crop 400x400+0+0 -mattecolor Tomato -frame 10x10+5+5 crop2.bmp", 0 )



Resize to 50% with double-frame raised and convert to TIF
WAITRUN ( ( "convert fantasy2.jpg -resize 50% -mattecolor SkyBlue -frame 10x10+10+0 -frame 15x15+10+0 frame3.tif" , 0 )



You can do everything like rotate, increase contrast, convert to black and white, adding borders .....

Best regards
Uwe

[Marcelo Via Giglio]

Daniel, Uwe

thanks very much for your help, finally I found the way with freeimage

http://forums.fivetechsupport.com/viewtopic.php?f=6&t=14889#p76878

Thanks to César too

Regards

Marcelo