CODEWITHSUNDEEP
c#system.drawing
michaeln
michaeln

Reputation: 1052

Image resizing - file size not shrinking like in Python

I just wrote a simple image resizer in Python 2.7 using the PIL environment. Because I wanted a nice and fast GUI, I decided to port it to C#. My Python code looks like this

k = I.open(f)
h = int(k.size[1] / float(k.size[0]) * maxWidth)
s = (maxWidth, h) if maxWidth < k.size[0] else k.size #only care about landscape
k = k.resize(s, I.ANTIALIAS)
k.save(os.path.join(outdir, i))

whilst my C# port looks like this

Bitmap bitmap = new Bitmap(image, w, h); //image = Image.FromFile()
bitmap.Save(destPath);  //disposing later in the code

I'm running into some strange file size problems. With Python I'm resizing the image to about 1500x1000 pixels and the file is about 180kB big. The file created by my C# application at 1500x1000 pixels is about 2000kB big, so I guess there's some unneccessary information added by C#.

How can I reduce my image's file size in C# like I can in Python?

Upvotes: 0

Views: 180

Answers (2)

C.Evenhuis
C.Evenhuis

Reputation: 26446

Depending on the type of image, you can set additional properties. Jpeg for instance has a "quality" setting, you can specify while saving the image. See for example msdn.microsoft.com/en-us/library/bb882583(v=vs.110).aspx

Note that these EncoderParameters differ per file format. See http://msdn.microsoft.com/en-us/library/bb882589(v=vs.110).aspx to determine which parameters are supported per format.

Upvotes: 2

GER
GER

Reputation: 2032

You could try saving it in a different format. 

bitmap.Save("C:\temp",ImageFormat.Jpeg);

Upvotes: 0

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