Target-less auto-alignment of image sensors in a multi-camera system

A non-transitory computer readable medium comprising instructions for determining a pixel shift between an image pair captured by image sensors, the instructions executable by a processor, the instructions comprising instructions for:

• accessing a first image and a second image of the image pair captured at a substantially same time, the images comprising image data representative of an overlapping field of view between the image sensors;
• determining edge magnitude and edge phase of the image data based on pixel luma components in the image data;
• identifying one or more processors one or more edges in the image data based, at least in part, on the edge magnitude and the edge phase of the image data, the identified one or more edges being substantially perpendicular to a rolling shutter direction of the image sensors;
• matching the identified one or more edges in the image data corresponding to the first image to the identified one or more edges in the image data corresponding to the second image;
• determining a pixel shift between the image pair based, at least in part, on the matching of edges;
• and
• calibrating the image sensors using the determined pixel shift.

A camera system comprising at least one processor, an image sensor, and a non-transitory computer readable medium comprising instructions for determining a pixel shift between an image pair captured by image sensors including the image sensor, the instructions executable by the at least one processor, the instructions comprising instructions for:

• accessing a first image and a second image of the image pair captured at a substantially same time, the images comprising image data representative of an overlapping field of view between the image sensors;
• determining edge magnitude and edge phase of the image data based on pixel luma components in the image data;
• identifying one or more edges in the image data based, at least in part, on the edge magnitude and the edge phase of the image data, the identified one or more edges being substantially perpendicular to a rolling shutter direction of the image sensors;
• matching the identified one or more edges in the image data corresponding to the first image to the identified one or more edges in the image data corresponding to the second image;
• determining a pixel shift between the image pair based, at least in part, on the matching of edges;
• and
• calibrating the image sensors using the determined pixel shift.