Patent ID: 11924575
Assignee: nan
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  G | IPC G  H

Claim 11:
12. A method of multispectral digitization of film comprising:
providing said film;
providing a light source that can generate a plurality of illumination lights each having a distinct narrowband light spectrum, with all of said illumination lights covering at least a visible spectrum;
providing a monochrome image recorder;
providing at least one of: a temperature sensor; and a spectrometer;
exposing in turn, using said light source, at least a plurality of frames of said film to a sequence of said plurality of illumination lights;
capturing, using said monochrome image recorder and during said exposing, an image of said film for each of one of said sequence of said plurality of illumination lights;
saving each of said captured images;
at least one of:
measuring, during said exposing, a temperature of each of said plurality of illumination lights using said temperature sensor; and
measuring, during said exposing, said narrowband light spectrum of each of said plurality of illumination lights using said spectrometer; and

executing at least one of:
adjusting said exposing or said capturing according to said measured temperature of said illumination lights to stabilize said distinct narrowband light spectrum of each of said illumination lights;
adjusting said exposing or said capturing according to said measured narrowband light spectrum of said illumination lights to stabilize said distinct narrowband light spectrum of each of said illumination lights; and
saving said measured temperature or said measured narrowband light spectrum as metadata of the corresponding one of said captured images, thereby allowing for better generation of digital polychromatic image of at least one of said plurality of frames of said film by considering said undesired change in said narrowband light spectrum.