|
Post by BuckSkin on Oct 20, 2024 18:17:33 GMT
I don't know why, but I was always under the assumption that png files were quite a bit smaller than jpeg files and that was why anyone would want to use them.
I was quite surprised at the results of a little screen-shot test I just performed.
I took a screenshot; so, thus, no EXIF data to weigh anything down.
I saved the screenshot as both a jpeg and a png.
The jpeg weighed in at 746KB
The png weighed in at 1.70MB = over twice if my math is correct.
Considering this, other than my reason explained below, why would I ever want to save anything as a png ?
The reason for my little test is that for years, so that a different program is the default handler of said images, I have saved any photos that went into the "Documents" side of things as png instead of jpeg.
If I need to see a photo relating to something in Documents, I can click to open it with a completely different program and not muddy up whatever I may be doing photography wise with FastStone.
Doing thus has caused me to often have to convert a jpeg to png.
|
|
pontiac1940
CE Members
Posts: 6,350
Open to constructive criticism of photos: Yes
|
Post by pontiac1940 on Oct 20, 2024 18:22:03 GMT
I save everything as jpeg. People send me emails with png files. Not keen on them for the reasons you said. Clive
|
|
Howard
Established Forum Member
Posts: 591
Open to constructive criticism of photos: Yes
|
Post by Howard on Oct 20, 2024 20:08:19 GMT
png are compressed files like jpg. You can choose the compression level when saving and this will affect file size.
The major benefits are:
1. png are lossless - no reduction in quality when resaving if the same compression level used.
2. Png supports transparent backgrounds whereas jpgs do not.
Hope that helps.
|
|
|
Post by Sepiana on Oct 20, 2024 20:44:33 GMT
|
|
|
Post by BuckSkin on Oct 20, 2024 23:13:07 GMT
Very well explained; and, yes, it does help my understanding of png.
|
|
|
Post by cats4jan on Oct 20, 2024 23:20:43 GMT
Why do you need pngs? For layering. To preserve transparency around graphics. I do not want that white box around my graphic.
|
|
|
Post by Jim on Oct 20, 2024 23:31:33 GMT
1. png are lossless - no reduction in quality when resaving if the same compression level used. 2. Png supports transparent backgrounds whereas jpgs do not. Well said, Howard.
|
|
Howard
Established Forum Member
Posts: 591
Open to constructive criticism of photos: Yes
|
Post by Howard on Oct 20, 2024 23:44:18 GMT
1. png are lossless - no reduction in quality when resaving if the same compression level used. 2. Png supports transparent backgrounds whereas jpgs do not. Well said, Howard. Thanks, Jim. I always doubt myself when offering such advice - glad I was correct!
|
|