Decreasing Image resolution..

[Piyush]

Hi! ol...

i just needed a code for decreasing resolution i.e making a thumbnail of an image...with same quality

and of same extension...if the original image is png then the thumb should also be a png image..

plz help...

[mdwerne]

Hi! ol...

i just needed a code for decreasing resolution i.e making a thumbnail of an image...with same quality

and of same extension...if the original image is png then the thumb should also be a png image..

plz help...

Maybe this?

http://www.autoitscript.com/forum/index.php?showtopic=88637&st=0&p=636878&hl=Image%20Resizer&fromsearch=1&#entry636878

[EndFunc]

AutoIt can't do this natively. Look for GDIPlus.au3 and try that. That should work for you.

[Piyush]

@endfunc thnks for ur reply ..i knw that it can be done by GDI library but i know nothing about image processing so..it is very difficult for me..to understand..

Edited July 26, 2010 by Piyush

[matwachich]

Here is a function for you:

Func _imageResize($oldImage, $newImage, $newW, $newH, $startGdiP = True)
    If $startGdiP Then _GDIPlus_Startup()

    $img =      _GDIPlus_ImageLoadFromFile($oldImage)
    $gContext = _GDIPlus_ImageGetGraphicsContext($img)

    $newBmp =   _GDIPlus_BitmapCreateFromGraphics($newW, $newH, $gContext)
    $gNewContext = _GDIPlus_ImageGetGraphicsContext($newBmp)

    _GDIPlus_GraphicsDrawImageRect($gNewContext, $img, 0, 0, $newW, $newH)

    _GDIPlus_ImageSaveToFile($newBmp, $newImage)

    _GDIPlus_ImageDispose($img)
    _GDIPlus_GraphicsDispose($gContext)
    _GDIPlus_GraphicsDispose($gNewContext)
    _GDIPlus_BitmapDispose($newBmp)

    If $startGdiP Then _GDIPlus_Shutdown()
EndFunc  ;==>_ImageResize

[Piyush]

thanks..@matwachich