Patent Document ID: 7612801
Application ID: 11782330
Patent Status: 1

Claim One:
1. An arrangement for calibrating a digital camera so that a digital derived image of a scene being photographed has the same highlights and shadows as the scene, the arrangement comprising: a target image having light and shadow areas; within the camera, a generator of brightness data and a histographic data organizer for organizing the brightness data into histographic data, the histographic data organizer having an initial brightness output of uncalibrated shadow and highlight data spikes, wherein the data spikes are not necessarily located at brightness boundaries of the camera, the data organizer further having calibrated data output with the shadow and highlight data spikes located at the brightness boundaries; a brightness data comparator within the camera and connected to the histogram data organizer for comparing the calibrated highlight and shadow data spikes to the initial highlight and shadow data spikes to generate a difference signal, and a camera adjustment driver connected between the brightness data comparator and a camera lens control for adjusting settings of lens aperture or lens shutter speed or both aperture and shutter speed until the difference signal indicates substantial correspondence between the initial histogram data boundary and the calibrated histogram data boundary to thereby set the histogram to the calibrated setting, whereby the image being photographed has at least substantially the same highlights and shadows as the scene being photographed.