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Re: How to do JPEG Compression Save at 10

by srinivasp :: Rate this Message:

Hi zaske:

I am trying to set the quality of a png to something lower (for smaller image size).
You are right "getQuality" of MagickImage returning a zero 0.

Just curious if anybody actually been sucessful in setting the compression/quality. Also when I use setXResolution (90) and setYResolution(90), and resize the image, the output png's x-resoultion is 0.009 and y-resolution is 0.009.

I dont know what to infer from that. Anybody help?

HI all,
To whom it may concern - I just wanted to point out that I just did quality setting and measurement.
Use the "getQuality" of MagickImage.
Use the "setQuality" of MagickInfo.

I tried using "getQuality" of MagickImage but it returned me 0 all the time, But the combination i wrote at the top is working.

Eric Yeo wrote:

On Mon, 2005-09-12 at 14:44 +0530, Prasad TV wrote:
> Hi All,
>
> I am using JMagick to resize JPG images. I am able to resize to any
> specified size. The problem is, I want to save the generated image
> using JPEG Compression "10". By default JMagick saves the images in
> JPEG Compression "12". But I want to save the generated image using
> JPEG Compression "10" and JPEG Compression "5" also. Please let me
> know any body has solution for this.
>
> It will be great help for me, if some one helps on this...
>
> I am using the following code to resize:
>
> ImageInfo info = new ImageInfo();
>
> MagickImage blobImage = new MagickImage(info, srcImageData);
>
> blobImage.setFilter(FilterType.HermiteFilter);
>
> MagickImage scaled = blobImage.zoomImage(imgWidth, imgHeight);
>
> processedImageData = scaled.imageToBlob(info);
>
> scaled.setFileName("F:\\imagestoprocess\\GeneratedImages\
> \shd0112l.jpg");
>
> scaled.writeImage(info);

Before calling writeImage, use the setQuality method in ImageInfo, e.g.

info.setQuality(XX);
scaled.writeImage(info);

Please note that the quality value range from 1 to 100 (I think).
Someone please confirm.

Regards,
Eric

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