This comment explains it (at least for Webkit's test image, which is probably similar to Instagram's).
>
No, it is a bad test.
It is an image with an ICC tag that indicates it uses a color space larger than sRGB. The image data has the logo using color that should be outside the sRGB color space, but it still uses 8 or 16 bits to store that data.
Android doesn't have color management. Android basically assumes all images are sRGB, so you see the logo.
iOS does have color management. iOS sees the ICC profile and interprets the image data so that if you do not have a display that could show you the different reds in the image, it doesn't display them.
So we have everyone in this thread on Android thinking they have a wide color display. Most of their displays aren't even 100% sRGB. My Nexus 4 shows the logo. It is very much not a wide-color display.
I used the same approach as the Webkit image, so the same applies here, too (it's also why we only serve Display P3 photos to iOS clients with wide color screens, most Android devices would treat them incorrectly)
yincrash|9 years ago
This comment explains it (at least for Webkit's test image, which is probably similar to Instagram's).
> No, it is a bad test. It is an image with an ICC tag that indicates it uses a color space larger than sRGB. The image data has the logo using color that should be outside the sRGB color space, but it still uses 8 or 16 bits to store that data. Android doesn't have color management. Android basically assumes all images are sRGB, so you see the logo. iOS does have color management. iOS sees the ICC profile and interprets the image data so that if you do not have a display that could show you the different reds in the image, it doesn't display them. So we have everyone in this thread on Android thinking they have a wide color display. Most of their displays aren't even 100% sRGB. My Nexus 4 shows the logo. It is very much not a wide-color display.
mikeyk|9 years ago
therealmarv|9 years ago