Correction of blotches in component images

A software carrier including instructions for performing at least the following:

• accessing one or more component images of a target image, the target image including a first component image and a second component image;
• accessing one or more component images of a reference image, the reference image including a first component image and a second component image;
• determining a motion vector characterizing motion between the target image and the reference image;
• comparing, based on motion indicated by the motion vector, the first component image of the target image with the first component image of the reference image to produce a first-component comparison result;
• comparing, based on motion indicated by the motion vector, the second component image of the target image with the second component image of the reference image to produce a second-component comparison result;
• and
• determining that the first component image of the target image includes a blotch based on the first-component comparison result and the second-component comparison result.

A method comprising:

• accessing one or more component images of a target image, the target image including a first component image;
• determining that the first component image of the target image includes a blotch;
• determining a metric for the blotch;
• determining the metric for a region of the first component image that connects to the blotch, wherein a region connects to the blotch if the region touches the blotch;
• comparing the metric for the blotch with the metric for the region to produce a result;
• and
• determining whether to include the region in the blotch based on the result.

A method comprising:

• accessing one or more digital component images of a target image, the target image including a first component image that includes pixels;
• determining that the first component image of the target image includes a blotch;
• identifying a non-blotch pixel that is connected to the blotch but is not in the blotch, wherein a pixel connects to the blotch if the pixel touches the blotch on one or more of a side or a corner;
• determining a count of blotch neighbors for the non-blotch pixel, the blotch neighbors being those pixels that are (1) connected to the non-blotch pixel and (2) included in the blotch;
• determining a count of non-blotch neighbors for the non-blotch pixel, the non-blotch neighbors being those pixels that are (1) connected to the non-blotch pixel and (2) not included in the blotch;
• comparing the count of blotch neighbors to the count of non-blotch neighbors;
• and
• determining whether to include the non-blotch pixel in the blotch based on a result obtained from comparing the count of blotch neighbors to the count of non-blotch neighbors.