Scanning old photos whether they need repairing or not is becoming increasingly commonplace as people convert their photos to digital versions. Using a scanner is straightforward -- the machine practically does it for you.
That's okay for photos that don't need restoration, but what if they do? It's important to choose the right settings for any photos you're planning to restore. Today's one size fits all approach means it's tempting to buy from the myriad of printer/scanner/copier combo machines that are available.
But they're cheap. And while they offer scanning features, there's a caveat. These devices are really just meant for everyday use. They're fine for scanning that family vacation snapshot, but they aren't up to snuff when it comes to restoration. A standalone flatbed scanner can offer a larger variety of settings.
The very first setting you'll want to look at is the file formats available for saving your scanned image. By default, many machines save the scan as a JPEG. The problem with JPEGs is that the format uses what's referred to as a “lossy form of compression.”
This means some of the original image information is lost, which affects the image quality. If you then work on the image and resave it, the image loss will worsen.
If your device offers you a list of formats to choose from, then TIFF or PNG are both good choices. As a photographer, my personal preference is TIFF as I work with those all the time with high-quality results. If you don't have a list of files to choose from then look for phrases like:
Any setting similar to those listed above is likely to be in a format other than JPEG and will be as lossless as your device allows. If a JPEG is your only option, then save it in the highest quality possible. JPEG file saving usually has a 1 to 100% quality setting option -- choose 100%. You can change the file format to a lossless one in your imaging software once it's scanned.
The first thing to consider here is the size of the photograph you want to scan. As a rough rule of thumb, the smaller a photo is, the higher the DPI will need to be. DPI, meaning dots per inch, is "a measure of spatial printing, video or image scanner dot density, in particular the number of individual dots that can be placed in a line within the span of 1 inch."
Measure your photograph and set your scanner DPI as Follows:
With very small photos you cannot afford to lose image information or detail and hence the critical need to scan at a very high resolution or DPI setting. For larger photographs, that setting can be lower as there is unlikely to be a critical loss of detail. You can scan any photo at 2400 DPI if you wanted to, of course, but it would take up a lot more disk space, and it'd take lot longer to scan. It really isn't necessary to go that high for every photo.
Most scanners offer the scan in color or black and white -- this something to keep in mind. Many old photos in need of restoration will be black and white, so people often make the mistake of scanning in black and white because that is what the image is. Makes sense, right?
Nope! You'll want to change the setting to color, even for black and white images. The reason being is that scanning in color can sometimes make the restoration process a little easier. Scanning in color makes any stains and blemishes on the original photograph stand out. It lets you know which areas are going to need extra work.
Another setting that scanners typically offer is the option to frame the image prior to doing a full scan. Most scanners will do a quick pass which shows you the image and then allows you to frame the area you want to be scanned.
A large photo will probably fill the scanning bed anyway but a small one will not. If you don't adjust the framing to fit the photo, you might be waiting a long time while the scanner scans the white space at 2400 DPI.
Before you run out and snag that base-model scanner at your nearest discount supply store, remember these four Steps to Scanner Settings:
Choosing the optimal settings for scanning photos for restoration gets easier with practice. Following these simple guidelines will help you choose the best scanning settings for your photographs.