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I am trying to compress down a selected UIImage as far as reasonably possible. I am currently compressing it like so:

UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
    NSData *imageData = [[NSData alloc] initWithData:UIImageJPEGRepresentation((image), 0.1)];

According to the length of the data, they come in anywhere between 250kb and 600kb depending on the photo selected. Maximising on storage is essential for me.

How would you suggest I might compress the photos down a little further? This is the only method I know of.

Thanks.

Josh Kahane
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2 Answers2

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There is a web page where is a nice chart regarding the quality and file size.

enter image description here

JPEG is a compression with data loosing algorythm. If for you doesn't matter the quality change the color palette to 256 or even 8 color ( grayscale) and after that use the maxed compression.

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You should probably grab a smaller version of the image. See this question for a good example of how to resize a UIImage. How to scale down a UIImage and make it crispy / sharp at the same time instead of blurry?

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Patrick Tescher
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  • This! +1. If you are going to compress it below even 10% quality JPEG (which looks like a piece of used toilet paper to begin with) then why even bother saving it at all... – borrrden Aug 13 '13 at 01:29