Image feature alignment

A method, comprising:

• identifying, using a processing system, a first reference feature point and a second reference feature point in a first sub-image associated with a first section of a borehole, wherein the first reference feature point and the second reference feature point are associated with corresponding high contrast regions in the first sub-image;
• locating, using the processing system, a first set of candidate feature points and a second set of candidate feature points in a second sub-image associated with a second section of the borehole adjacent to the first section of the borehole, wherein the first set of candidate feature points is associated with the first reference feature point and the second set of candidate feature points is associated with the second reference feature point;
• choosing, using the processing system, a first matching candidate feature point from the first set of candidate feature points and a second matching candidate feature point from the second set of candidate feature points;
• and
• based on the chosen first matching candidate feature point and the second matching candidate feature point, aligning, using the processing system, the first sub-image and the second sub-image to create an image of the borehole.

A method, comprising:

• accessing, using a processing system, a reference feature point in a first sub-image associated with a first section of a borehole, wherein the reference feature point is associated with a high contrast region in the first sub-image;
• identifying, using the processing system, two or more candidate feature points in a second sub-image associated with a second section of the borehole adjacent to the first section of the borehole, wherein each of the two or more candidate feature points are possibly associated with the high contrast region;
• pruning, using the processing system, the one or more candidate feature points using global solution pruning to arrive at a matching candidate feature point in the second sub-image;
• and
• based on the arrived-at matching candidate feature point, aligning, using the processing system, the first sub-image and the second sub-image to create an image of the borehole.