JPEG Compression --> save JPEG images with any quality


Using this code you can save an image (System.Drawing.Image) item as a jpeg image, specifying the quality of it. Jpeg quality is the same as compression so the lower the quality, the smaller the file size. It's simple to use, ie just do this:

[CODE
//add this!
using System.Drawing.Imaging;

/// <summary>
/// Saves an image as a jpeg image, with the given quality
/// </summary>
/// <param name="path">Path to which the image would be saved.</param>
// <param name="quality">An integer from 0 to 100, with 100 being the
/// highest quality</param>
public static void SaveJpeg (string path, Image img, int quality)
{
if (quality<0 || quality>100)
throw new ArgumentOutOfRangeException("quality must be between 0 and 100.");


// Encoder parameter for image quality
EncoderParameter qualityParam =
new EncoderParameter (Encoder.Quality, quality);
// Jpeg image codec
ImageCodecInfo jpegCodec = GetEncoderInfo("image/jpeg");

EncoderParameters encoderParams = new EncoderParameters(1);
encoderParams.Param[0] = qualityParam;

img.Save (path, jpegCodec, encoderParams);
}

/// <summary>
/// Returns the image codec with the given mime type
/// </summary>
private static ImageCodecInfo GetEncoderInfo(string mimeType)
{
// Get image codecs for all image formats
ImageCodecInfo[] codecs = ImageCodecInfo.GetImageEncoders();

// Find the correct image codec
for(int i=0; i<codecs.Length; i++)
if(codecs[i].MimeType == mimeType)
return codecs[i];
return null;
} [/code]

a small problem is though, that you should use long as quality, not int. Anyway that's the only way I got it to work, got an error the way you used it...
For EncoderParameter qualityParam = new EncoderParameter (Encoder.Quality, quality); quality can be something like 50L, or casting: (long)50, or you could use (long)quality, should also work... for me that does the trick anyway

__________________
M.Ramesh Kumar

Hi,
i think this code in ASP.net, is there any script available from PHP?

It seems if we install GD or any other image library, we can do any image operation in PHP.

__________________
With,
J. Jeyaseelan
Everything Possible

The script is used for image compression such as photo gallery and the script automatically compress the image base on the given dimension. it will automatically calculate the landscape image or portrait image

before use this code you must have to enable your gd library




i think it can help you

__________________
With,
J. Jeyaseelan
Everything Possible