Method and device for aligning color channels

A projector comprising:

• a plurality of microdisplay devices configured to project a corresponding plurality of color channels;
• a camera configured to capture images of the projected color channels;
• a processor configured to:
• control the microdisplay devices to project a plurality of test patterns on a surface for at least two color channels;
• add the captured images of the projected color channels to an image set;
• identify a reference position based on the image set;
• process the image set to estimate divergence of the respective test patterns for each color channel with respect to the reference position;
• compute a corrective function for each color channel based on the estimated divergence from the reference position;
• apply the respective corrective function to each microdisplay device to align the respective color channel to the reference position.

A system comprising:

• a projector comprising a plurality of microdisplay devices configured to project a corresponding plurality of color channels;
• a camera configured to capture images of the projected color channels;
• a processor configured to:
• control the microdisplay devices to project a plurality of test patterns on a surface for at least two color channels;
• add the captured images of the projected color channels to an image set;
• identify a reference position based on the image set;
• process the image set to estimate divergence of the respective test patterns for each color channel with respect to the reference position;
• compute a corrective function for each color channel based on the estimated divergence from the reference position;
• apply the respective corrective function to a respective one of the microdisplay devices corresponding to each color channel to align the color channel to the reference position.