Readiris opens black-and-white, greyscale and color images in the JPEG, Paintbrush (PCX), DCX fax (multipage version of the Paintbrush format), PNG, (compressed) TIFF and Windows bitmap (BMP) format, and opens Adobe Acrobat PDF documents.
Select the disk as input source to open prescanned images.
Enable the option Digital Camera to make Readiris use special recognition routines optimized for the low-resolution images of digital cameras. Good recognition requires an image resolution of 300 dpi. Digital cameras typically produce images with a significantly lower resolution - even when you hold the camera close to the document.
Tip: when you submit images with a resolution below 200 dpi to Readiris without enabling this option, Readiris issues a warning asking you to rescan the page.
Enable the option Process as 300 dpi to ensure that Readiris processes and formats low-resolution images normally, as if they had a 300 dpi resolution.
Your camera model determines which options are supported.
Select the highest image resolution. Create for instance 2,048 x 1,536 size images when 1,024 x 768 and 640 x 480 images are also supported.
Enable the ômacroö mode of your camera to take closeups - which is always the case when you photograph documents. (This mode was designed to capture flowers, insects etc.) Otherwise, the images are unsharp and illegible.
Limit yourself to no or small compression - important compression reduces the sharpness of the captured text.
Hold the camera directly above the document to avoid capturing the document at an angle. However, avoid shadows cast on the document by the camera or your hand!
Produce stable images. Consider mounting your camera on a tripod when necessary.
Zoom manually to crop your document. (Some cameras are bundled with photo stitching software, but donÆt bother using it for document capture.)
Disable the flash when youÆre filming glossy paper, otherwise the image may be too light.
Select a color mode: most digital cameras support greyscale and color images.
Adapt the brightness and contrast to the environment - day light, lamp light, neon light etc.
Calibrate the camera by filming a white document.