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grey lines on white background jpg images


TimK

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hej community,

 

I've got the problem (also since PS 1.5.4) with PS 1.6.0.9 that my jpg images with white backgrounds get grey lines and dots... It's a problem with the change of the size... Where could be the problem by me? 

 

Anyone an idea? I can't find anything about that into the internet... :-/

 

thanks!

 

 

PS: I use a mac with safari and pixelmator for my images...

post-724259-0-56353300-1412331614_thumb.jpg

Edited by TimK (see edit history)
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buuut, with image size of 1000px x 1000px and an compromisation size of 250 or 100 or 500 all is good 

 

I get this lines with image sizes of 997px for example ...

I could change that, I know, but the system should doo the compromisation without lines and dots...

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nothing?

 

they are lightly but you see them... Look more from down on the display... you'll see they lines better...

 

I've they on my mac on all prestashop resized images with odd new or old image size!

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  • 1 month later...

Hi TimK,

 

I have the exact same problem as you have :(

 

On the attached image:

Left one is when I upload a .jpg

Right one is when I upload a .png

 

It only put those grey lines on resized image by prestashop automatically.

So the solution I see, is that I could resize eveything myself and upload them on each subfloder on my ftp

32-thickbox_default/

25-home_default/

etc..

But I will be a loooooong job!

 

Nobody has had this problem besides timK and me ?

 

ps: I thought it could be my laptop screen or something, but I can see those lines on my smartphone too.

post-339902-0-95246800-1415726216_thumb.jpg

Edited by GenZai (see edit history)
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I've done some more tests.

So I've found a better solution, instead of having a whitebackground I should have a transparent background and upload as PNG.

The other solution is to put a colored background (let's say blue), i've done some test the grey lines still appear but you really need to know it to see it, so it won't be a problem for the customers.

In my case I really need to use white background around my product to go with my theme, so I need to go with the transparent solution.

 

I hope it helps, maybe there are better solutions but it's the only thing I could come with for the moment.

Edited by GenZai (see edit history)
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  • 3 weeks later...
  • 1 month later...

Is there any news on this issue? If have the same problem. On my screen you only see it if you look to the screen in a sharp angle (i.e. from top to bottom). When you look the normal way, you barely can't see it. Ofcourse we prefer clean images.

 

The largest pictures I use is 800 x 800, even when I upload them in 800 x 800 (jpg quality set to max/100) you see the grey lines/dots.

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