Gif to jpg help needed

Question

Hi,
I have to convert a gif image to a jpg image but when I convert, the image size increases from 22 kbytes to 50 kbytes. is there a way I could convert the image without increasing the size in java?
can somebody help me with this. I would be very glad if somebody could help me with this.
I am using Jmagick for this.
MagickImage.setFormat("jpg");
I don't need it to be done using Jmagick, but if there is a way I would definitely like to know.
Thanks,
Samanth.

Answer 1

The size of the JPG depends on the content of the image itself; in most cases, the JPG is smaller than the GIF, even with high quality images. The size of the JPG can be controlled by how much information you are willing to lose; this is controlled by a parameter called Quality.
ImageMagick (and therefore JMagick, since this is only the Java interface to ImageMagick) has a parameter for setting the quality; in command-line tools, it is the parameter -quality; in programming, I think it is MagickSetCompressionQuality(); check the documentation. Quality ranges from 0 (lowest, barely recognizable) to 100 (highest)
Without JMagick, you can use the built-in ImageIO
//Read the file to a BufferedImage
BufferedImage image = ImageIO.read(new File("c:/temp/image.gif"));
Once you have the BufferedImage, you can write the image as a JPG. You will need to create a File object for the destination image. When calling the write() method, specify the type string as "jpg" (other formats are supported).
ImageIO.write(image, "jpg", new File("c:/temp/image.jpg"));