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Last Post:
6 Jan 25, 14:05
Last Post By: M-i-c-h-a
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Posts:
123
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7-Nov-2021
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How to avoid image processing of JPG?
Posted:
3 Jan 25, 10:16
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Hello,
I have inserted a logo into the hero banner (theme image) of the Tiger UI on my website (apidarium.de). I created a clean looking JPG, but after creating the album, the logo looks blurry and shows artifacts. How can I avoid a new image processing for JPG?
I use PNG for the album images and these are converted to JPG. That is fine. I just don't want the JPG to be converted to JPG again.
I am not sure if the unwanted conversion comes from Tiger or jAlbum.
Best-
Micha
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Posts:
3,891
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Re: How to avoid image processing of JPG?
Posted:
3 Jan 25, 13:31
in response to: M-i-c-h-a
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If you don't want PNGs to be converted to JPEG. Untick "Force JPEG images" and "Force JPEG thumbnails" under Settings->Images->Advanced.
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Posts:
123
Registered:
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Re: How to avoid image processing of JPG?
Posted:
3 Jan 25, 14:34
in response to: davidekholm
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Thank you Rob, I tried the logo function now, but it's not the place where I need it.
David, the force png to jpg function is nice so, it's like I want it. I miss to keep JPG as JPG and not to convert them again. I optimized my JPG and if it is converted to JPG a second time it looks not clean anymore.
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Posts:
1,458
Registered:
6-Sep-2005
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Re: How to avoid image processing of JPG?
Posted:
4 Jan 25, 08:46
in response to: M-i-c-h-a
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The generation of the hero image is separate from other images in the album. These are generated by the skin, not by jAlbum, as normal images. If the image is already at the final size (1080px wide), the resizing should not happen. I'll check out the code. If the source image is large enough, the scaled-down version should also be sharp. (As sharp as other images in the album.) The worst possible scenario is if you save the image too small but wider than the page width (e.g., 1200px wide) - that'll introduce resizing artifacts.
In the future, I will add more sizes for the folder images, so they look sharper on Hi DPI displays.
Another option is adding the logo as a transparent PNG by using a custom code. But that's a bit more complicated.
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Posts:
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Re: How to avoid image processing of JPG?
Posted:
4 Jan 25, 17:23
in response to: Laza
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Interesting. The max page width is set to 1080px, but the banner is shown with 1350px in the web browser. This caused a blur look and so I use 1350px for the banner image. Maybe there is something wrong in the code that 1080 is shown as 1350 and internal converted.
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Re: How to avoid image processing of JPG?
Posted:
4 Jan 25, 19:36
in response to: JeffTucker
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Oh that's right, I've been using Windows at 125% for a few years now because I use a large screen with lots of pixels for work, but that means a lot of things are very small. I didn't even think about that anymore. Great idea that it could be that. Thank you.
I'll give it a try and see what it looks like with a banner at 1080px.
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Posts:
123
Registered:
7-Nov-2021
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Re: How to avoid image processing of JPG?
Posted:
6 Jan 25, 14:05
in response to: M-i-c-h-a
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Finally I got it quite good working with the right source image size. Thank you for all the hints.
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