We have a handful of Flickr photos allegedly taken by an HTC employee with two mysterious devices, "HTC 0PJA10" and "HTC 0PJA13". Previously, certain leaks and rumors suggested that these two code names might be connected in to the One (M9) in some way, and we shouldn't rule out the possibility that these are the regular version of the upcoming flagship and its rumored, more powerful version, the One (M9) Plus (a.k.a Hima Plus).
As far as the properties of the photos are concerned, their resolution (3,024 x 5,376 pixels) indicated that these might have been taken by a 16MP camera, but this is unlikely - as Phandroid points out, they've been cropped so as to fit in a 16:9 aspect ratio. Naturally, this means that the original images were probably slightly bigger, which further adds fuel to the 20MP fire. This also probably means that HTC will be utilizing a Sony-made camera sensor.
As usual, these alleged camera samples from the HTC One (M9) should be taken with a handful of your favorite type of salt. Still, check out the samples right below; you can also head on to the source link and take a look at the EXIF data for each image.