Your donation of Denver related photos that you have now or take in the future is needed to keep this project growing!
There are three ways to get your image files to us for uploading:
Image Size/Format: Remember the target media for your photo is display on a computer monitor. For most visitors, that monitor will have a viewable display area of 600x400 pixels. However the 600x400 pixel image size is only a rule of thumb!
File Size and Compression: When I process an image file, my target compressed file size is 50kb. Again that is only a rule of thumb. Some images are quite readable cropped and compressed to 15 kb. Other images with larger formats and more detail produce files as large as 150 kb after compression. We must also remember that the JPEG compression standard actually throws away photo information in the compression process. Applying too much compression results in an image with fuzzy text and blurred details. My personal rule of thumb for "normal" JPEG compression is about 15:1 and I change it as necessary.
Scanner vs Display Resolution: This setting is expressed in dot per inch (dpi) for both media. If you accept your scanner software's default 72 dpi scan resolution for a 3.5 x 5 photograph to be displayed on a monitor, you will wind up with an image that is only about 350x240 pixels. However, I have found that using 150-200 dpi for the scanner resolution usually provides a better starting point (a displayed image 750-1000 pixels wide before cropping). Your scanner software may provide a separate enlargement setting that can be used to adjust display size instead of changing the resolution.
Need Assistance Getting Started? An excellent scanner tutorial can be fount at A Few Scanning Tips.
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