The coordinate system iOS uses to place content onscreen is based on measurements in points, which map to pixels in the display. A standard-resolution display has a 1:1 pixel density (or @1x), where one pixel is equal to one point. High-resolution displays have a higher pixel density, offering a scale factor of 2.0 or 3.0 (referred to as @2x and @3x). As a result, high-resolution displays demand images with more pixels.
- Step 4: Once all images are selected, go to Tools Adjust Size. Step 5: Enter the width or height value to resize your photos to your liking. If you’re only going to resize the width for example, make sure “Scale Proportionally” is selected.
- Download Google Photos App. Upload and view your photos from any device. Auto upload photos from your Mac or Windows computer, smartphone, camera, or storage cards.
- Unmodified Original, High and email as Actual Size from both iPhone and macOS all came out to the same size (although emailing from macOS occasionally produced a slightly larger file). On the other hand, Maximum produced a file almost three times as large, with no perceivable difference in quality when blown up on a 27” non-Retina iMac.
- Macos App Store
- Macos Photos App Original Size Chart
- Macos Photos App Original Size Photo
- Photos App For Windows
Image Size and Resolution
For example, suppose you have a standard resolution (@1x) image that's 100px × 100px. The @2x version of this image would be 200px × 200px, and the @3x version would be 300px × 300px.
Supply high-resolution images for all artwork in your app, for all devices your app supports. Depending on the device, you accomplish this by multiplying the number of pixels in each image by a specific scale factor.
Dec 01, 2015 Photos app Understanding “Optimize Mac Storage” in Photos for Mac One of the more interesting features of Photos for Mac is its ability to not store my entire photo library on my Mac’s drive. 1 It does this by syncing the entire library to iCloud Photo Library 2 and then dynamically loading and unloading photos as you use it.
Device | Scale Factor |
---|---|
12.9' iPad Pro | @2x |
11' iPad Pro | @2x |
10.5' iPad Pro | @2x |
9.7' iPad | @2x |
7.9' iPad mini 4 | @2x |
iPhone XS Max | @3x |
iPhone XS | @3x |
iPhone XR | @2x |
iPhone X | @3x |
iPhone 8 Plus | @3x |
iPhone 8 | @2x |
iPhone 7 Plus | @3x |
iPhone 7 | @2x |
iPhone 6s Plus | @3x |
iPhone 6s | @2x |
iPhone SE | @2x |
Designing High-Resolution Artwork
Use an 8px-by-8px grid. A grid keeps lines sharp and ensures that content is as crisp as possible at all sizes, requiring less retouching and sharpening. Snap the image boundaries to the grid to minimize half pixels and blurry details that can occur when scaling down.
Produce artwork in the appropriate format. In general, use de-interlaced PNG files for bitmap/raster artwork. PNG supports transparency and, because it's lossless, compression artifacts don't blur important details or alter colors. It's a good choice for intricate artwork that requires effects like shading, textures, and highlights. Use JPEG for photos. Its compression algorithm usually produces smaller sizes than lossless formats and artifacts are harder to discern in photos. Photo-realistic app icons, however, look best as PNGs. Use PDF for glyphs and other flat, vector artwork that requires high-resolution scaling.
Use the 8-bit color palette for PNG graphics that don’t require full 24-bit color. Using an 8-bit color palette reduces file size without reducing image quality. This palette is not appropriate for photos.
Optimize JPEG files to find a balance between size and quality. Most JPEG files can be compressed without noticeable degradation of the resulting image. Even a small amount of compression can save significant disk space. Experiment with compression settings on each image to find the optimal value that yields an acceptable result.
![Macos photos folder Macos photos folder](/uploads/1/3/3/9/133919127/827882225.jpg)
Macos App Store
![Photos app windows 10 Photos app windows 10](/uploads/1/3/3/9/133919127/110466886.png)
Provide alternative text labels for images and icons. Alternative text labels aren’t visible onscreen, but they let VoiceOver audibly describe what's onscreen, making navigation easier for people with visual impairments.
One of the more interesting features of Photos for Mac is its ability to not store my entire photo library on my Mac’s drive.1 It does this by syncing the entire library to iCloud Photo Library2 and then dynamically loading and unloading photos as you use it.
In true Apple fashion, Photos protects the user from thinking about managing storage — everything happens automatically, with absolutely no intervention from the user. That’s as it should be, but a few optional controls for the control freaks among us wouldn’t be the worst thing in the world.
This thought occurred to me when I was fishing a file out of my Pictures folder and noticed that my Photos library takes up 46GB of my precious iMac SSD storage space.
That’s a lot, especially when you’re supposed to render an HD video in Final Cut Pro, but you can’t because you’re out of disk space. There’s no button for me to press to put Photos in Austerity Mode, no interface to force it to slim down what it’s using. How to check if macos app is 32-bit. In fact, there’s no communication at all from the app about how it manages its own storage space.
Plumbing the depths of the Internet, I found this pretty great post on StackExchange that charts the size of the Photos library and a Mac’s disk usage. Photos is definitely optimizing the size of its library, though it’s still not entirely clear to me whether it only does this when it’s running, or if there’s some background process that might do it all the time. (My guess is that it’s the former.)
Macos Photos App Original Size Chart
What that post does clarify is that Photos apparently has an optimization target: 10 percent of free disk space. So on my 467GB partition, it’s trying to free up roughly 47GB of free space. See all open apps mac. (At the moment that drive has 42GB free, so I guess it’s working?)
Macos Photos App Original Size Photo
I’m also a little surprised at the 16GB of thumbnails in my Photos Library. That’s 240K in thumbnail data for every one of my 67,782 photos. It turns out that the Photos library actually generates two thumbnail files for each image: one “1024” image (roughly in the ballpark of 1024-by-768 pixels, though it varies based on aspect ratio) that’s 200K-300K, and a standard thumbnail that’s more like 480-by-360 and 50K-75K.
Those thumbnails are what make the Photos interface so pretty and responsive, even at Retina resolutions. At the same time… 135,000 thumbnail files on my SSD taking up 16GB of space. I guess that’s the trade-off of having a huge cloud photo library, but… wow.
I’m so happy that this feature exists, but in a future update I’d love to see a bit more transparency about how the storage is being optimized, and perhaps even a user option to blow out the cache or reduce the library size by some amount. Or, failing that, it needs to be much more aggressive in pruning its library in low-disk situations. Install android app on mac os x.
- After all, my photo library is larger than my Mac’s drive, so it just won’t fit! I had to break my old iPhoto Library into pieces and store it on a server. ↩
- You can’t use this feature if you aren’t using iCloud Photo Library, because Photos needs a data source for the files it’s deleting. ↩
Photos App For Windows
If you appreciate articles like this one, support us by becoming a Six Colors subscriber. Subscribers get access to an exclusive podcast, members-only stories, and a special community.