Blurry png image problems

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Level 1

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Blurry png image problems

Hi,

I really tried everything already and I still dont have a solution!: (

I made some images in illustrator in pgn format, that I want to integrate in my iBook. Png format is a must as the illustration background has to be transparent.

The bigger images are in png-8 (in order to reduce the book size), they are slightly blurry but the smaller ones, even if I changed them to png- 24 are extremely blurry!

The smaller images are around 388px x491px in illustrator. This is the size, that I can drag &drop into author without having to resize it.

It is, however still blurry.

Is there any way to make my images sharper on the new iPad?

I would be so thankful for a little help,

Kora

iPad

Posted on Mar 21, 2012 4:38 AM

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Answer 1

K T

Level 7

23,889 points

Mar 21, 2012 7:58 AM in response to Kora

The standard bit depth for iOS icons and images is 24 bits (8 bits each for red, green, and blue), plus an 8-bit alpha channel.

Try that instead - use Preview (the Application) to save and confirm, then test on a device...

As well, you can't have both small image file size and premium image quality - pick one and accept the other. Should you have trouble deciding, I'd suggest going with quality 🙂

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Answer 2

Mar 21, 2012 9:39 AM in response to Kora

Have you tried a larger size in Illustrator, maybe twice the size. Import into iBooks and set the image size to the original (half size) in iBooks?

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Answer 3

Kora Author

Level 1

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Mar 22, 2012 5:56 AM in response to K T

I am not sure what you mean by save & confirm in preview...

Through the proview application I tried a gif, a pdf, a png but the image was still blurry...I could improve the color slightly by the auto color fukrion but I couldn't get it more sharp.

Yes you are right about quality this would be my choice too, but be it an 8-png or a 24-png, the result is the same...: (

As it is a picture book, I have a lot of images. Maybe this is as good as it can get at the moment.

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Answer 4

Kora Author

Level 1

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Mar 22, 2012 6:05 AM in response to David Bourne

Yes David, I tried this too...unfortunatelly, if I downsize an objekt it becomes absolutly blurry....I dont really understand why this is....if I dont change the size it is better, its ok but still not that good...maybe it is just some ibook author limitation.

Thanks anyway!

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Answer 5

Mar 22, 2012 6:31 AM in response to Kora

You should get crystal clear images. What DPI?

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Answer 6

Kora Author

Level 1

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Mar 22, 2012 7:35 AM in response to Sputnik Slim

I looked in the web, and they say, that as a vecor graphic, it does not depend on the dpi.

Still I found a way to change it - normally it is 75dpi, I changed it to 300dpi in illustrator but it didnt improve the image.

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Answer 7

Mar 22, 2012 8:16 AM in response to Kora

Do you have your photos in the raw/original state that you can go back to and start out at the higher resolution?

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Answer 8

Mar 22, 2012 8:23 AM in response to Sputnik Slim

Also, check that vector graphics are an acceptable file for IBA (like png, jpg, etc)

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