1-36

γγ
γγ
γ
White balance 1
Exposure Memorized color
Fig.A-1 Comparison with image reproduction among copier,scanner and digital camera
Photo A-1 Picture comparison among decisive factors for image
White balance 2

6 Additional Guidance

6–1 iSAP (intelligent Scene Analysis based on Photographic Space) Technology
An important role of copiers and scanners is to faithfully reproduce the image quality of the original. With digital
cameras, on the other hand, it is essential to regenerate captured images naturally.
However, attempting to faithfully reproduce a captured image does not always result in a natural image. This is
why image rendering, an inherent technology of digital cameras, is so important to digital photography.
Image rendering is the inclusion of several elements including ‘exposure control appropriate to the scene =>
auto exposure (AE)’, ‘color reproduction based on human sense Æ addition of memorized colors’, ‘faithful
color reproduction independent of background colors/color reproduction that compensates for the color
temperature of the light source Æ auto white balance (AWB)’ and ‘tone representation that looks natural to the
eye Æ γ γ
γ γ
γ characteristic’. Obviously, image rendering assumes that ‘precise focus control Æ auto focus (AF)’
is performed as well.
Digital camera
Image Rendering Technology
AE, AWB, γ
Copier Scanner
Color Matching Technology
Faithful reproduction of original image quality Desirble image quality for photographer
VS
iSAP
Technology
Know-how from Film camera
Know-how from
Video camera