A method for combining images includes capturing a first image including a subject from a first camera. A second image is captured from a second camera and the second image includes the subject. First pre-processing functions are applied on the first image to produce a first processed image. The first pre-processing functions include applying a distortion component of a rotation matrix to the first image. The rotation matrix defines a corrected relationship between the first and the second image. Second pre-processing functions are applied on the second image to produces a second processed image. The second pre-processing functions include applying the rotation matrix to the second image. The first processed image and the second processed image are blended in a processing unit to form a composite image.

Systems and methods are provided for alternating projection of content and capturing an image. The method includes steps of projecting, by a projection device, content at a first rate, projecting, by the projection device, a capture frame at a second rate, and capturing, by an image capture device, an image including the capture frame at the second rate, wherein capturing the image comprises capturing the image when the capture frame is projected. Systems and methods provided herein may provide increased tracking accuracy by a projecting a capture frame that does not obscure features in the image.

Systems and methods are provided for alternating projection of content and capturing an image. The method includes steps of projecting, by a projection device, content at a first rate, projecting, by the projection device, a capture frame at a second rate, and capturing, by an image capture device, an image including the capture frame at the second rate, wherein capturing the image comprises capturing the image when the capture frame is projected. Systems and methods provided herein may provide increased tracking accuracy by a projecting a capture frame that does not obscure features in the image.

A system for generating an image of a seal impression. The system includes: means for acquiring N still images of a face of a seal corresponding respectively to N beams of light striking the face in succession, wherein N is at least 2; and means for combining the N still images to generate a composite image of pixels, wherein a common area of pixels in the composite image appears on the face of the seal in all still images of the N still images, and wherein the common area includes a character area pertaining to where an engraved character is located on the face of the seal.

A system for generating an image of a seal impression. The system includes: means for acquiring N still images of a face of a seal corresponding respectively to N beams of light striking the face in succession, wherein N is at least 2; and means for combining the N still images to generate a composite image of pixels, wherein a common area of pixels in the composite image appears on the face of the seal in all still images of the N still images, and wherein the common area includes a character area pertaining to where an engraved character is located on the face of the seal.

A system includes a spatial light modulator (SLM) and a circuit including a processor. The SLM includes pixel elements. The circuit is configured to convert M primary video signals to N multi-primary video signals. The circuit is configured to use a first multi-primary video signal to derive a first additive offset to a first primary video signal, to use the first multi-primary video signal to derive a second additive offset to a second primary video signal of the M primary video signals, to add the first additive offset to the first primary video signal, to add the second additive offset to the second primary video signal, and to derive a bit plane based on the first primary signal having the first additive offset added thereto and to transmit the bit plane to the SLM to selectively control on and off states of the pixel elements of the SLM.