wait what, 194mb PNG?

Image looks legit at least (i.e. not upscaled).

chen said:
wait what, 194mb PNG?

Looks like it isn't compressed. I tried to re-save it in my machine and got a version < 30MB (can probably further compress it to get one with even smaller size).

moonian said:
Looks like it isn't compressed. I tried to re-save it in my machine and got a version < 30MB (can probably further compress it to get one with even smaller size).

Yeah that would save a lot of bandwidth if the site would re-process the PNGs without messing with the metadata.

a 32 bit bitmap at this size should be 186.9 MB
this size is rather odd

It's not. It's 16bit/ch (48bit in total) PNG, and actually compressed.

In bitmap it would be 11338*5670*3*16/8/1024/1024 = 367.85 MiB.

By the way, I don't even know if .BMP supports 16bit/ch or not, at least Photoshop can't save it so.
I can save it in portable bitmap format (.PBM) in Photoshop and confirm the size is as expected, though.