How to reduce the size of an image in C# and .NET 3.5? -

i have screen shot take in mobile app. screen shot takes 32 kb when saved png on disk.

i sending these central sql server , 32 kb big amount of times need store screen shot (approx 2500 times day).

is there kind of trickery can save smaller?

here code using take bitmap bytes (to send server storage):

memorystream stream = new memorystream();  _signatureimage.save(stream, imageformat.png);  return stream.toarray(); 

_signatureimage bitmap , screenshot in question.

here example of screen shot saving:

things pop mind (but don't know how them):

1. reduce actual height , width of image (but in way not distort it).
2. change black , white image (not sure if see real space savings this)
3. compress more (i don't because not readable database).

note, has done programatically, , cannot take long, complex image manipulations out.

thanks help.

    private static image resizeimage(int newsize, image originalimage)     {         if (originalimage.width <= newsize)             newsize = originalimage.width;          var newheight = originalimage.height * newsize / originalimage.width;          if (newheight > newsize)         {             // resize height instead             newsize = originalimage.width * newsize / originalimage.height;             newheight = newsize;         }          return originalimage.getthumbnailimage(newsize, newheight, null, intptr.zero);     } 

this should work bitmap object type , resize height or width, depending on appropriate image dimensions. maintain scale.

edit:

you create new bitmap object , resize original image bitmap object.

bitmap b = new bitmap(newwidth, newheight); graphics g = graphics.fromimage((image)b); g.interpolationmode = interpolationmode.highqualitybicubic;  g.drawimage(imgtoresize, 0, 0, newwidth, newheight); g.dispose();  return (image)b; 

i don't have compact framework installed, seems should work you.