Losing Image Quality with JPG?
- Thread starter ShinRa
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Vegeta897
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JPEG is an image format that compresses an image's size by reducing quality. There are varying degrees of this. Programs like MS Paint use a pretty shitty compression. Most good programs let you change the quality of it.
Druckles
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This. I think if what I think you're saying is correct... when you save a file as a JPEG and then view it, it will appear to have lost quality. But after the first time, no further quality will be lost.
You could always open up the image again and touch it up (this works in Paint (urgh, damned program D
)
Kyorisu
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Pray tell how the heck did you come to that conclusion? Think about it logically. How does viewing data alter it in anyway? Further more lets use an example. How would a read only .jpg loose quality when viewed?
Use your head next time please. Here are hopefully all the answers you need;
1. Saving a .jpg from any source (such as the internet) will not change the data. You are merely copying the data.
2. Viewing a .jpg from any source will not change the data.
3. Re-saving/saving anything to the jpeg format will result in a loss of quality. This is different from 1. as you are viewing the data and once more performing the operations necessary to save the data in the jpeg format. This results in a loss of quality i.e. compression.
Asus
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A copy is an exact copy. The same quality. It's if you RE-save it then quality goes down.
Same quality - If you right-click the file and copy it the file is not being converted to JPG.
Quality loss - If you go to 'file->save as' within the picture program then it will convert to JPG...even if it was already a JPG it will do it again.
Same quality - If you right-click the file and copy it the file is not being converted to JPG.
Quality loss - If you go to 'file->save as' within the picture program then it will convert to JPG...even if it was already a JPG it will do it again.
Raziaar
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Yeah, because on these forums you're around the most intelligent people in the world.
That was sarcasm.
Oh and also, funny story. In the past, I used to think that my old videos games started to look like utter pixellated crap because over time the data on the cartridges got corrupted and old, and it made them look worse.
It took me a while to understand that it was simply because I was being exposed to more beautiful graphics that those old graphics looked so bad.
It's funny, as over the years, each new generation of games I played have looked amazing to me. Back when I got my first NES, it looked beautiful. It looked to me like halflife 2 does now, in the sense that nothing looks amiss or weird. It made sense. It was as realistic as I've ever seen, so I was really surprised when I looked back on it years later and it didn't look realistic at all... yet the games I was playing then looked realistic to me, because they were the most realistic at the time. Yet I look back on those games now, and they obviously look like crappy games from a visual standpoint.
Amazing really.
Asus
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It's funny because it works on the Mac version of IE...
Stigmata
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PNG is great until you start using it to save really complex images, and then the filesize goes all to hell.
