How resize image width and hegiht WITHOUT increase image physical size

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Hi every one.
I need to reduce image width and height (sometimes just 10px even), but when i do it, the physical size increase 2 or even 3 times!
I try 2 method

C#

var newImage = new Bitmap(newWidth, newHeight);
Graphics.FromImage(newImage).DrawImage(image, 0, 0, newWidth, newHeight);

And

C#

var newImage = image.GetThumbnailImage(newWidth, newHeight, null, IntPtr.Zero);

Both of them increase physical image. coz sometimes i reduce width 10px, coz i need all photos in 500px width, and people upload images for example in 510px width.
in this situation increasing physical size is more.

Any suggestion please?
Thanks in advance.

Posted 4-Aug-13 22:09pm

arminamini

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lukeer 5-Aug-13 4:39am

What exactly do you call "physical size"?

Is ist the file size in bytes?
Or the size of a photo when printed in cm/inch?

arminamini 5-Aug-13 6:06am

I mean file size, bytes.

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DataBytzAI · Accepted Answer · 2013-08-04T22:38:00

Solution 1

Check what image format type you are saving as - BMP for example has a bigger footprint than jpg. Also check the resolution you are saving at. Both of these factors affect physical file size.

Look here:

http://msdn.microsoft.com/en-us/library/system.drawing.bitmap.save.aspx[^]

and here

[^]

Posted 4-Aug-13 22:38pm

DataBytzAI

Comments

arminamini 5-Aug-13 6:06am

Thank u very much. it works!

DataBytzAI 5-Aug-13 7:27am

welcome.