Stereoscopic film marking and method of use
OwnerDavid Lee Lund, William Gibbens Redmann +1inventors
InventorsDavid Lee Lund, William Gibbens Redmann, Mark J. Huber
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Abstract
A method and apparatus are described for monitoring frame alignment status and correcting misalignment for film in a stereoscopic 3D projection system, in which gap indicia are provided onto the film in a gap between images, whether the images belong to the same frame or different adjacent frames. Thus, gap indicia are positioned in at least one of an interframe gap and an intraframe gap of the stereoscopic film. During projection of the film, presence or absence of the gap indicia is used to determine a frame alignment status. Frame misalignment is then easily diagnosed and corrected. Characteristics of the gap indicia are modified for improving frame alignment diagnosis.
Claims24
A method for use in a three-dimensional (3D) film projection system, comprising:
- projecting a film having a plurality of stereoscopic image pairs, the film including a first gap indicium positioned in a first gap between consecutive images in at least a first subset of the plurality of stereoscopic image pairs, wherein the first gap is selected from a group including an interframe gap and an intraframe gap;
- detecting for a presence of at least one of:
- the first gap indicium and a projection thereof;
- and
- determining a stereoscopic frame alignment status for the stereoscopic image pairs based on result of the detection.
A method for producing a film, the film comprising a plurality of pairs of stereoscopic images arranged in sequential order, wherein an inter-frame gap is formed between two adjacent images from different consecutive pairs of stereoscopic images, and wherein an intra-frame gap is formed between two adjacent images from a same pair of stereoscopic images, the method comprising:
- writing a first gap indicium to the film within the intra-frame gap, the first gap indicium for identifying a frame alignment condition when the first gap indicium is detected upon being subjected to projection;
- and
- writing a second gap indicium to the film within the inter-frame gap, the second gap indicium for identifying a frame misalignment condition when the second gap indicium is detected upon being subjected to projection;
- wherein the second gap indicium exhibits one or more discernibly different properties from the first gap indicium.
A film comprising:
- a plurality of stereoscopic image pairs of first and second images arranged in sequential order;
- a first gap indicium positioned substantially within an intra-frame gap formed between first and second adjacent images from a same stereoscopic image pair;
- and
- the first gap indicium for identifying a frame alignment condition when the first gap indicium is detected upon being subjected to projection.
A projection apparatus, comprising:
- means for projecting a film having a plurality of stereoscopic image pairs, the film including a first gap indicium positioned in a first gap between consecutive images in at least a first subset of the plurality of stereoscopic image pairs, wherein the first gap is selected from a group including an interframe gap and an intraframe gap;
- means for detecting a presence of at least one of:
- the first gap indicium and a projection thereof;
- and
- at least one of:
- means for indicating a frame misalignment condition for the stereoscopic image pairs, when the presence is not detected;
- and means for indicating a frame alignment condition for the stereoscopic image pairs, when the presence of at least one of the first gap indicium and a projection thereof is detected.
Dependencies are inferred from the claim text.