Method for calibrating image capturing sensor consisting of at least one sensor camera, using time coded patterned target

A system for calibrating an image capturing sensor including at least one imaging sensor using a time coded pattern target, the system comprising a processor configured to:

• generate for display a time sequence of homogeneous gray scale images on a screen;
• capture the time sequence of homogeneous gray scale images by the at least one imaging sensor;
• determine a correcting gamma curve based on the captured time sequence of homogeneous gray scale images;
• subsequent to determining the correcting gamma curve, generate for display the time coded pattern target on the screen, wherein the time coded pattern target comprises a pattern sequence of a plurality of time coded patterns for sequential display in an image plane of the screen, wherein the pattern sequence of the plurality of time coded patterns is sequentially displayed in the image plane of the screen when the screen is located at a fixed position in space, wherein the pattern sequence of the plurality of time coded patterns is sequentially displayed in the image plane of the screen according to the correcting gamma curve;
• receive from the image capturing sensor a sequence of images capturing the pattern sequence, each image of the sequence of images corresponding to a time coded pattern of the plurality of time coded patterns of the pattern sequence;
• determine an association between one or more pixels of the pattern sequence of the plurality of time coded patterns and one or more captured image points of the sequence of images and generate point correspondences for the fixed position of the screen in space;
• and
• calibrate the image capturing sensor based on the point correspondences.

A non-transitory computer readable medium having encoded thereon executable instructions that, when executed by at least one processor, perform a method for calibrating an image capturing sensor including at least one imaging sensor using a time coded pattern target, the method comprising:

• generating for display a time sequence of homogeneous gray scale images on a screen;
• capturing the time sequence of homogeneous gray scale images by the at least one imaging sensor;
• determining a correcting gamma curve based on the captured time sequence of homogeneous gray scale images;
• subsequent to determining the correcting gamma curve, generating for display the time coded pattern target on the screen, wherein the time coded pattern target comprises a pattern sequence of a plurality of time coded patterns for sequential display in an image plane of the screen, wherein the pattern sequence of the plurality of time coded patterns is sequentially displayed in the image plane of the screen when the screen is located at a fixed position in space, wherein the pattern sequence of the plurality of time coded patterns is sequentially displayed in the image plane of the screen according to the correcting gamma curve;
• receiving from the image capturing sensor a sequence of images capturing the pattern sequence, each image of the sequence of images corresponding to a time coded pattern of the plurality of time coded patterns of the pattern sequence;
• determining an association between one or more pixels of the pattern sequence of the plurality of time coded patterns and one or more captured image points of the sequence of images and generating point correspondences for the fixed position of the screen in space;
• and
• calibrating the image capturing sensor based on the point correspondences.