I.R.I.S. Readiris Pro 12 for Windows User Guide - Manual (Page 36)

Chapter 5 – Scanning documents
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Using a digital camera
Select Digital camera when you are using a camera as scan
source. Readiris uses special recognition routines to process
digital camera images.
Tips for using a digital camera as scan source:
 Calibrate the camera by photographing a white document.
 Always select the highest image resolution.
 Enable the macro mode of the camera to take close-ups.
 Only use optical zoom, not digital zoom.
 Hold the camera directly above the document. Avoid
photographing the document at an angle.
 Produce stable images. Use a tripod if necessary.
 Disable the flash when capturing glossy paper.
 Avoid opening compressed camera images.
 Adapt the Readiris brightness and contrast settings to the
environment (day light, lamp light, neon light).
 Select color or grayscale as color mode.
Processing as 300 dpi
Select Process as 300 dpi when you are processing images of an
incorrect or unknown resolution. The images will be processed as
if they had a 300 dpi resolution.
The resolution of digital camera images is nearly always unknown.
Smoothening color images
This option is selected by default as image smoothening is needed
with some scanners to recognize color and grayscale images
successfully.