0
votes
0answers
31 views

How does Apple compress/deliver the razor sharp @2x images on its website in tiny file sizes?

I've always wondered how they compress them. They have massive 2800x800 pixel images on their landing page that are just 90KB. In general all the imagery on Apple.com is very high quality, yet the ...
0
votes
4answers
123 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 ...
2
votes
2answers
102 views

Small JPEG image (just 21.8 KB) without lack of quality — why is that?

This image size is just 21.8 KB without lack of quality. Why is that? How is it done?
3
votes
1answer
530 views

How to determine what quality a JPG was saved as?

When saving JPG images with Pixelmator or Photoshop, I select a quality from the scale 1–100 that gives optimum file-size. Later on, I sometimes take these images and crop them a little more (not ...
14
votes
9answers
67k 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
3answers
6k views

What are lossless image format?

What are lossless image format?