Tips for high-resolution scans

With newer iPhone and iPad models sporting 12MP cameras, you can get pretty high-resolution scans with Pic Scanner Gold app. The tips below will help you get the best out of our apps Pic Scanner and Pic Scanner Gold.

Although recent iPhone and iPad models have great cameras, the scan resolution captured with Pic Scanner or Pic Scanner Gold, can vary considerably depending on how you scan. Here are a few easy scanning tips for getting high-quality scans:

To begin with, know that iPhone 6s/7 and iPad Pro have 12 MP cameras, iPhone 5/6 and iPad Air 2 have 8 MP, and older models only have 5 MP or less. Scan resolution will obviously depend on the iPhone/iPad model and camera.

If you have an iPhone as well as iPad, scan with iPhone. An iPhone will generally have a better camera than similar-vintage iPad. iPad is also heavier and bulkier, which makes it harder to hold steady and avoid camera shake.

1) Scan one or two photos at a time:

Scanning multiple photos at a time is faster, but it affects resolution. If scanning two or four photos at a time, it’s worth seeing how to arrange the photos:

     1Scan2              4photos

Scanning four at a time is obviously faster than scanning two, but it halves the scan resolution. The more photos you squeeze into each scan, the fewer pixels you’ll get in each cropped photo. If scanning for archival or reprinting, do one or two photos at a time. For quick sharing on Facebook, scanning 3-4 may is OK. An iPhone or iPad with 12 MP camera is good even when you scan four photographs at a time.

2) Ensure good lighting:

iPhone and iPad cameras aren’t great in low-light conditions. Photos taken in poor light will look dull and grainy.

       sharp             grainy

Can you tell which of the above scans was done by daylight (which is best for scanning) and which was in poor light? (So if you’ve downloaded the app at night, now isn’t the ideal time to put it to test;)!

Scan near a window to get indirect light and no glare. Electric light (scanning at night) is OK, but colors may come out different in white (fluorescent) vs. yellow light.

Most of all, the scan resolution of cropped photos depends on HOW you scan.

3) Camera distance:

When you scan with iPhone or iPad, the captured image contains your photos and some (white or plain) background. Pic Scanner detects, crops out and saves the photos and discards the background. This is how auto-cropping works.

Now let’s see three examples that illustrate right and wrong ways to scan:

Background OK     Camera too far     Camera too close

In photo #2, the camera is too far. Too much background; too little photo. So, while cropping will be correct, most of your megapixels will be discarded and you’ll get a low resolution scan. Conversely, if the camera is too close and the photo extends beyond the scanner frame (Photo #3), photo will be cropped inaccurately. Photo #1 is the correct way to scan.

4) Arranging photos:

When scanning photos, arrange them as shown below so as to minimize the white background:

Orientation not OK     image[6]     Wrong way     Correct gap

In the above examples, #1 and #3 contain too much white space and will result in lower resolution scans. Examples #2 and #4 minimize white space, and are better.

Thus, how you place the photos and how far you hold the camera can have a significant impact on the resolution of cropped photos.

Bonus tips for Pic Scanner Gold users with iPhone 6 / iPad Air or newer devices: 1) Enable High-Resolution Scans Mode by tapping Menu > Info & Settings > Quality Control. Cropping in this mode takes a bit longer, but resolution is much higher. 2) During cropping, photos’ thumbnails appear at the bottom of Scanner screen. You can tap them to go to Gallery.

 

 

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