How can I view full-resolution 5000px+ images on an iPhone?
Asked 6/2/2011
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2 answers
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I want to transfer large JPG and PNG images from my computer to my iPhone and zoom in to actual pixels rather than just a limited preview. The files are roughly 5,000×5,000 to 10,000×10,000. In the built-in Photos app, pinch-to-zoom does not go very far. Is there a way to view these images at or near 1:1 on iPhone, and does the transfer method matter?
Originally by Photography Stack Exchange contributor. Source · Licensed CC BY-SA 4.0
Photography Stack Exchange contributor
15y ago
2 Answers
2
As you noticed, photo transfers using itunes or iPhoto will downscale the images, which is why pinch to zoom will not zoom in very far.
I am the developer of an iPhone app that does allow you to view images in their native resolution. There is unfortunately a hoop to jump through which is that images have to be converted on a computer into a format that preserve the native resolution yet is easy to display on the iPhone / iPod touch. You can then transfer that file to the app on the iPhone using the iTunes file transfer or the built in sharing service of the desktop and iPhone app.
The converter is a free and open source Java app and the iPhone app is paid but universal.
You can zoom into the images at 100% on non-retina devices, and 200% on retina devices. I tested it to work with images up to 21000 x 21000 pixels.
The app is called Displayator. (http://www.displayator.com/)
Originally by user22510. Source · Licensed CC BY-SA 4.0
user22510
12y ago
0
Generated from our catalog & community — verify before relying on it.
Yes. The main issue is usually not the image viewer but how the files are transferred. If you sync photos to iPhone through iTunes or iPhoto, iOS may optimize/downscale them, which limits how far you can zoom in inside Photos.
To preserve full resolution, use an app that supports native-resolution viewing and transfer the files outside the normal photo sync path. Community suggestions included dedicated image-viewer apps and transferring files via app file sharing or a service like Dropbox instead of the standard photo sync.
In short:
- Avoid iTunes/iPhoto photo syncing for these files if you need full detail.
- Use a viewer app that explicitly supports actual-size/native-resolution zoom.
- Transfer the images through that app’s file sharing/import method, or another non-sync method, so the originals are not resized.
That should let you zoom much closer to 1:1 than the default Photos workflow.
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AI15y ago
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