Questions about the JPEG (`/ˈdʒeɪpɛɡ/ jay-peg`) file format. JPEG, seen most often with the `.jpg` extension, is a commonly used method of lossy compression for digital photography.

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3
votes
5answers
2k views

Why does saving low quality JPGs as high quality in Photoshop increase their file size?

I have a low quality background image that is about 85kb. If I open the file in Photoshop and then save it at 100% quality, the file size increases to 640kb. This doesn't make sense, the image is ...
0
votes
1answer
7k views

How can I convert a JPEG to a transparent GIF image, replacing white with transparency?

So I have a JPEG with a white background and want to make it a transparent GIF without walk around job and without Photoshop also. So is there a way to create a transparent GIF image from usual JPEG ...
3
votes
2answers
280 views

How to fill with similar colours?

I have this image that have been damaged by JPG, and would very much like to restore it, as if it had never been compressed with JPG. Can someone help me with this? I assume I need to fill with ...
-3
votes
1answer
63 views

How do I apply a border on a picture from another picture [closed]

I want to add the border on this picture: to this picture: How do I accomplish this?
16
votes
9answers
84k views

Facebook: Ways to preserve image quality of uploaded images?

After uploading an image, Facebook converts it to a new image. Their conversion process introduces artifacts and mottling to the magenta-ish parts of the image. Original image: Facebook's ...
3
votes
4answers
14k views
4
votes
3answers
7k views

What are lossless image format?

What are lossless image format?