Image Quality Considerations with Shared Photo Streams
Ask iLounge offers readers the opportunity to get answers to their iPod-, iPhone-, iPad-, iTunes-, or Apple TV-related questions from a member of the iLounge editorial team. We'll answer several questions here each week, and of course, you can always get help with more immediate concerns from the iLounge Discussion Forums. Submit your questions for consideration using our Ask iLounge Submit Form. We reserve the right to edit questions for grammar, spelling, and length.
Q: It seems to me like the Shared Photo Stream feature is more targeted at people who share lots of photos of low importance. Sadly not for people who want to share treasured moments with close friends and family. I guess I still have to rely on e-mails for those full-sized photos?
- Mike11, in a comment on iCloud Photo Stream and Image Quality
A: Realistically, the Shared Photo Stream feature is primarily designed for sharing photos on iOS devices and viewing on the web, although it can also be synchronized to Aperture or iPhoto on a Mac or to a folder via the iCloud Control Panel on Windows.
The resolutions used in Shared Photo Streams compare quite favourably to most other social networks such as Facebook. More photo-focused services do provide full-resolution options, but many such as Flickr, require a paid “Pro” account to access this capability.
Unfortunately the race to continually drive up the number of megapixels in modern cameras has led many people to forget that most cameras already use resolutions that are significantly higher than strictly necessary for casual viewing and printing of photos.
A standard iPhone 5 photo in the Shared Photo Streams is stored at a resolution of 2048 x 1536. By comparison, a 1080p HDTV or typical computer display maxes out at around 1920 x 1080, and even the iPad Retina Display is only 2048 x 1536. This means that these photos are already at a resolution that is higher than almost any device that you would be using to actually view these photos; it would only be on a Retina Display MacBook Pro (2560 x 1600 / 2880 x 1800) where this might start to make a difference.
Similarly, 2048 x 1536 would suffice for printing photos at standard sizes up to and including 5” x 7”. Note that the math here for calculating printing requirements is relatively straightforward; simply multiply the inches by the desired DPI to get the number of pixels required, where 300dpi is considered to be the standard pixel density for a professional quality photograph. Therefore, a 5” x 7” print would ideally require a 1500 x 2100 source image; while 2048 is slightly lower on the long edge, the aspect ratio of the original photo and the 5” x 7” print don’t actually quite match up (1.33:1 vs 1.4:1), so a standard print wouldn’t fill the full 7” on the long edge anyway.
The bottom line is that the resolution used by Shared Photo Streams should be more than sufficient for the vast majority of users who are simply viewing photos on just about any device they could access them on, regardless of whether you’re sharing casual photos of low importance or treasured moments. Remember that the standard Photo Stream will still provide the full-resolution images to your own photo library for editing and archival; it’s only the Shared Photo Streams that store downscaled versions to save both storage space and bandwidth.
The only real exception is if those you are sharing with regularly need to edit your photos or make larger prints of them (e.g. 8” x 10”). In this case, it’s true that Shared Photo Streams will not be an ideal solution, but there are many alternatives out there that can provide more effective sharing of original, full-resolution photos even directly from your iOS device. For example, both Dropbox and Flickr provide native iOS applications that allow for original, full-resolution photo uploads, and Dropbox can even be configured to automatically upload all new photos from your Camera Roll, which can then be shared with other users—in their full resolution—via Dropbox shared folders or web links.
The tradeoff with third-party utilities such as this is that you lose the seamless iOS integration. Shared Photo Streams will update in the background and your friends and family don’t need to install an additional app on their devices and can receive automatic notifications whenever new photos are added. Third-party apps don’t get the same background privileges, requiring you to actually launch the app in order to upload photos—even if you’re using an automatic feature such as the one found in Dropbox—and to leave them running if you’re uploading more than a handful of images.
Of course, there is no reason you can’t use a hybrid of both solutions either. Shared Photo Streams can be a great way to highlight those photos that you want to share from your device right away, while a Dropbox folder can still be used for those friends and family who may want or need full-resolution versions of the photos for archival or editing.
- Will removing a credit card from Safari also remove it from Apple Pay?
- Can I mute Handoff calls coming into my Mac from my iPhone?
- How do I keep my iPhone calls from ringing on my Mac?
- Why doesn’t Traffic show up on my Today Notifications Screen?
- Why doesn’t my iPhone reconnect to Wi-Fi after I turn it on?
- Why can’t I see the iPad-style landscape view on my iPhone 6 Plus?
- August adds Motion Detection, Video Recording to Doorbell Cam
- Black hat security firm triples exploit bounty to $1.5m in wake of improved iOS 10 security features
- BMW acknowledges Bluetooth problems with iPhone 7
- Apple announces ‘Game of Thrones: Enhanced Edition’ interactive iBooks
- Apple announces App Store Search Ads
- Apple announces iOS business development partnership with Deloitte
- Apple logs iMessage contact info, could be compelled to offer info to police
- Apple reportedly calls in hackers for meeting on bug bounty program
- Apple creating new London headquarters
- Honeywell debuts Lyric T5 HomeKit-enabled smart thermostat
- IK Multimedia iRig HD 2
- 808 Audio XS Sport Rugged Wireless Speaker
- Mass Fidelity Core Bluetooth Speaker
- Thought Out Simplex Tablet iPad Stand
- SmartX Galaxy ZEGA Starter Kit
- Apple iPhone 7 Plus Leather Case
- Apple Watch Series 2
- iPhone 7 and iPhone 7 Plus
- Twelve South HiRise 2 for iPhone + iPad
- Nomad Pod Pro for iPhone and Apple Watch
- Instant Expert: Secrets & Features of watchOS 3
- Instant Expert: Secrets & Features of tvOS 10
- Instant Expert: Secrets & Features of iOS 10
- Inside the betas: iOS 10 Photos gets Advanced Computer Vision
- Inside the betas: iOS 10 Music app delivers ‘clarity and simplicity’
- Inside the betas: iOS 10 Maps gets a major redesign
- Inside the betas: iOS 10 shakes up the user experience
- Inside the betas: watchOS 3 promises a real speed boost
- Inside the betas: A sneak peek at what’s new in tvOS 10
- Filling the Gap: A look at third-party HomeKit apps