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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17
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9answers
95k 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 ...
2
votes
4answers
2k views

How can we talk about the “resolution” of a JPEG file?

A JPEG is characterised with three parameters: width (pixel), height (pixel) and bit depth (bits per pixel). And resolution is a characteristic for output devices, e.g., monitors or printers. Why? ...
0
votes
1answer
92 views

What is the easiest way to have a better quality image from a given image

I am a novice for graphic design. I have a low quality image which is given by my friend, its size is really small, but we want to make it bigger and clearer so that we can use it as a banner or logo ...
1
vote
1answer
919 views

Why does my compressed JPG have different colors from the original file?

I have no idea at all, first of all, of image internal composition and color modes. That said, I have a very strange problem. These are the pictures: Well, the ORIGINAL is more colorful in ...
1
vote
4answers
20k views

Resizing/shrinking .JPG files without losing quality?

Im using Gimp to resize images. When using a high res image normally 4500 x 2994 i usually need to shrink this image to 325 x 130 pixels. As you can imagine i loose the shiny, glossy and high res ...
0
votes
4answers
242 views

Which raster image format is better for digitally displaying images when there is no transparency; JPEG or PNG?

I'm trying to determine which format is better to use when there is no transparency in an image. More importantly though, I'm trying to figure out when it's better to use one over the other. From ...