Automatic image orientation and straightening through image analysis

A device comprising:

• an image capture component;
• a memory;
• and
• a processor operatively coupled to the memory and the image capture component and configured to execute program code stored in the memory to:
• receive an image obtained with the image capture component;
• select a feature detector;
• analyze the received image with the selected feature detector to identify a detected feature;
• determine an orientation for the received image based, at least in part, on the detected feature;
• rotate the received image to the determined orientation;
• determine an in-plane rotational offset between a known typical alignment and an identified alignment of the detected feature at the determined orientation;
• adjust an alignment of a scene depicted in the rotated image based, at least in part, on the determined offset to generate a straightened image;
• and
• save the straightened image in the memory.

A method, comprising:

• receiving, by a processor, an image obtained with an image capture device;
• analyzing, by the processor, the received image with a feature detector;
• determining, by the processor, a first image orientation for the received image based, at least in part, on a detected alignment of one or more features in the received image identified by the feature detector;
• rotating the received image to the first image orientation;
• determining, by the processor, a second image orientation for the received image based, at least in part, on an in-plane rotational difference between a known typical alignment and the first image orientation;
• adjusting, by the processor, the in-plane rotational alignment in the rotated image based, at least in part, on the determined second image orientation to generate a straightened image and
• saving the straightened image in a memory.

A non-transitory program storage device, readable by a processor and comprising instructions stored thereon to cause the processor to:

• receive a first image obtained with an image capture device, the first image comprising first positional information that describes an orientation of the image capture device at a time the first image was obtained;
• analyze the first image with one or more feature detectors to identify one or more features in the image having an in-plane rotational variance with respect to a known typical alignment;
• adjust an orientation of the first image based, at least in part, on the in-plane rotational variance of the one or more identified features;
• receive a second image obtained with the image capture device, the second image comprising second positional information that describes an orientation of the image capture device at a time the second image was obtained;
• determine a change in orientation of the image capture device based on the first positional information and the second positional information;
• adjust an orientation of the second image based, at least in part, on the adjusted orientation of the first image when it is determined that the change in orientation of the image capture device is less than a threshold value;
• and
• save the adjusted first and second images in a memory.

A non-transitory program storage device, readable by a processor and comprising instructions stored thereon to cause the processor to:

• receive an image having an image orientation and depicting a scene;
• analyze the image with one or more feature detectors;
• determine a feature offset and an associated feature offset weight for each of one or more features identified by the one or more feature detectors, wherein each feature offset describes a rotational difference between an expected feature alignment and an observed feature alignment in the image;
• determine a scene offset based, at least in part, on the feature offsets of the one or more identified features and calculated weight average of the feature offsets of the one or more identified features;
• rotate the depicted scene based, at least in part, on the scene offset;
• and
• save the image in a memory.