which one
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agoodphoto
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which one
which ones should I use. someone please explain to me what each option does. thanks.
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LeviFiction
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Re: which one
I recommend keeping the defaults but that depends on your needs.
Compression
Do you need a small file? Go with "Smallest". Smallest uses compression. PNG files compress "slowly" in the sense that a really large image might take a few seconds to encode. This is because a good PNG encoder will try 5 different filters on every line row of pixels in the image to find the best filter method for those lines before compressing to get the smallest possible image. If you're doing 5 operations over 3000 rows with over 2000 pixels per row, it's going to be a little slow. But you'll end up with the smallest possible PNG image. So if size is a concern, and you don't mind taking 2-6 seconds per large (camera photo sized) image, go with "Smallest".
If you don't need it to be small, if it's already a small image or you're not concerned with space and you just need it to get through the images as quickly as possible use "None/Fast" this won't compress the image at all. It'll just store 3-4 bytes of data per pixel in the image. Which, if you use our image size from before 3000x2000, would be about 22MB large if you also had transparency. 17MB if you don't. Estimated.
Interlace
Now, interlaced. This just refers to how the data is stored and presented while downloading. It goes back to the dial-up days of slow internet connections (some people still have slow internet connections of course) it would allow the browser to load a degraded version of the image quickly, and as the rest of the image loaded would slowly add more and more data until the image was full resolution. It was just a way of presenting the image quickly over a slow connection. And won't matter for simple storage or sharing. So most just leave it at the default of "None".
Compression
Do you need a small file? Go with "Smallest". Smallest uses compression. PNG files compress "slowly" in the sense that a really large image might take a few seconds to encode. This is because a good PNG encoder will try 5 different filters on every line row of pixels in the image to find the best filter method for those lines before compressing to get the smallest possible image. If you're doing 5 operations over 3000 rows with over 2000 pixels per row, it's going to be a little slow. But you'll end up with the smallest possible PNG image. So if size is a concern, and you don't mind taking 2-6 seconds per large (camera photo sized) image, go with "Smallest".
If you don't need it to be small, if it's already a small image or you're not concerned with space and you just need it to get through the images as quickly as possible use "None/Fast" this won't compress the image at all. It'll just store 3-4 bytes of data per pixel in the image. Which, if you use our image size from before 3000x2000, would be about 22MB large if you also had transparency. 17MB if you don't. Estimated.
Interlace
Now, interlaced. This just refers to how the data is stored and presented while downloading. It goes back to the dial-up days of slow internet connections (some people still have slow internet connections of course) it would allow the browser to load a degraded version of the image quickly, and as the rest of the image loaded would slowly add more and more data until the image was full resolution. It was just a way of presenting the image quickly over a slow connection. And won't matter for simple storage or sharing. So most just leave it at the default of "None".
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agoodphoto
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Re: which one
wow! this is a little bit above my head, but THANK YOU. I think I will leave it set at the default setting, which is what the image I posted has it at, I'm assuming.