Isap (Intelligent Scene Andlysis Based On Photographic Space) Technology - Canon PowerShot S230 Service Manual

6 Additional Guidance
6–1 iSAP (intelligent Scene Analysis based on Photographic Space) Technology
An important role of copiers and scanners is to
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
color reproduction independent of background colors/color reproduction that compensates for the color
temperature of the light source
γ γ γ γ γ characteristic'. Obviously, image rendering assumes that 'precise focus control
eye
is performed as well.
Copier
Faithful reproduction of original image quality
Fig.A-1 Comparison with image reproduction among copier,scanner and digital camera
White balance 1
Photo A-1 Picture comparison among decisive factors for image
faithfully reproduce the image quality of the original. With digital
auto white balance (AWB)' and 'tone representation that looks natural to the
Scanner
VS
Color Matching Technology
Exposure
White balance 2
1-36
addition of memorized colors', 'faithful
Digital camera
Technology
Know-how from Film camera
Image Rendering Technology
AE, AWB, γ
Desirble image quality for photographer
Memorized color
auto focus (AF)'
iSAP
Know-how from
Video camera
γ γ γ γ γ