System and method for recording dynamic range of a photograph's luminance
AssigneePictureFlow LLC
InventorMichael Tapes
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Abstract
A method is disclosed for recording ambient lighting conditions from a reference card using a digital camera to record a spectral response of the reference card to enable a digital photograph to be white balanced. The method can include the operation of providing a substrate to carry a reference surface. A highly polished material can be applied over the substrate to form a reference card having a highly polished surface. The reference card can be photographed with the digital camera to record the ambient lighting conditions.
Claims26
A method for recording ambient light conditions on a black surface using a digital camera to record a black point to set a lower limit of a dynamic range of a photograph's luminance, comprising:
- providing a substrate to carry the black surface;
- applying a highly polished material over the substrate to form a black reference card having a highly polished black surface;
- photographing the black reference card with the digital camera to record the black point.
A method as in claim 12, further comprising selecting the highly polished material such that the material is substantially transparent to electromagnetic energy in at least one of the infrared, visible, and ultraviolet spectrums.
A system for recording ambient light conditions on a black surface using a digital camera to record a black point to set a lower limit of a dynamic range of a photograph's luminance, comprising:
- a substrate configured to carry the black surface;
- and
- a highly polished material coupled to the substrate to form a black reference card having a highly polished black surface.
- a digital camera configured to photograph the black reference card to record the black point.
A system for recording ambient light conditions on a black surface using a digital camera to record a black point to set a lower limit of a dynamic range of a photograph's luminance, comprising:
- a means for providing a substrate to carry the black surface;
- a means for applying a highly polished material over the substrate to form a black reference card having a highly polished black surface;
- a means for photographing the black reference card with the digital camera to record the black point.
- a highly polished black reference card configured to provide a black reference in a photograph, the card having a black surface configured to reflect light incident on the card, wherein the light is incident on the card at an angle of incidence, and the light is reflected at an angle substantially similar to the angle of incidence.
A method for recording ambient lighting conditions on a reference card using a digital camera to record a spectral response of the reference card to enable a digital photograph to be white balanced, comprising:
- providing a substrate to carry a reference surface;
- applying a highly polished material over the substrate to form a reference card having a highly polished surface;
- and
- photographing the highly polished reference card with the digital camera to record the ambient lighting conditions.
Dependencies are inferred from the claim text.