Why a Dual Camera iPhone 7 Is Such a Big Deal
Rumor has it we may see a dual camera iPhone 7 Plus at some point. Why two cameras you may ask?
Welcome to the age of computational photography, where an image is not the direct result of a single optical exposure, but the calculated result of image information combined from two or more image sensors.
The combination of the high resolution, high performance compact imagers and optics in todays smartphones plus the increasing computational power of mobile processors allows some heavy duty real-time image processing that just wasn’t possible until now.
Why two are better than one
The combinations of multiple imagers allows all kinds of imaging improvements, ranging from higher quality, and more accurate noise reduction in low light conditions, to improved resolution and color sampling, as well as optical quality zoom with no actual moving optics. The technology allows a significant amount of “virtualization” of otherwise physical optical processes.
According to MacRumors, Apple may well implement this technology and bring out a dual camera iPhone 7 Plus thanks to technology acquired from LinX.
This is a similar technology to Corephotonics dual camera imaging system seen in this video produced by CNET.
According to CNET – “Corephotonics has three models currently ready for use in phones, the first being a combination of a 13-megapixel and an 8-megapixel camera that gives a maximum 3x optical zoom. The second, its slimmest model, is a combination of two 13-megapixel cameras, though one is black-and-white only, for better low-light shots. The third and final new model is a called “Hawkeye” and features two paired 13-megapixel cameras; one’s normal and the other uses a proprietary technology that folds the light for 5x optical zoom. It’s also capable of optical image stabilisation.”
Smartphones Are Catching Up
It is no secret that the gap between smartphone cameras and the likes of the DSLR and mirrorless compact camera have been closing. What is interesting, and perhaps a little surprising to some is that the smartphone market is leading the revolution, not the professional photography tech industry. In fact, it seems there is evidence that the DSLR and mirrorless market may in fact be shrinking.
It is clear that the commercial power of mass market devices has a much stronger pull than the relatively niche world of professional photography. It’s been said for some time that “the best camera you have is the one that’s on you”, and more than ever, that’s your phone.
It will be interesting to see what the video results are from these technologies, and when this type of computational imaging will come to high end digital video. I wrote up some thoughts a while back for anyone interested in some further reading, it’s a far stretch from the technology we’ll see in our smartphones but I believe it’s the future: Computational Photography for Cinema – When Lenses Become Plugins
It seems we will have to wait and see how this technology plays out in the smartphone market first before we worry too much about selling off all our beloved lenses.