Image processing apparatus, image processing method, and program

An image processing apparatus comprising:

• image obtaining means for obtaining a first image and a second image in which a subject is captured;
• search area size calculation means for calculating a search area size on a basis of a pixel size of at least one image among the first image and the second image;
• conversion means for obtaining a second converted image in which a resolution is converted such that the second image has a different pixel size;
• deformation information obtaining means for obtaining deformation information between a reference image and the second converted image when the first image or a first converted image in which a resolution is converted such that the first image has a different pixel size is set as the reference image;
• position obtaining means for a position of interest on the reference image and a correspondence position on the second converted image corresponding to the position of interest on a basis of the deformation information;
• search area setting means for setting a search area made up of the search area size in a surrounding of the correspondence position on the second converted image;
• and
• difference means for deciding a difference value corresponding to the position of interest on a basis of a density value of the position of interest on the reference image and density values of a plurality of positions in the search area on the second converted image.

An image processing apparatus comprising:

• image obtaining means for obtaining a first image and a second image in which a subject is captured;
• search area size calculation means for calculating a search area size on a basis of a pixel size of at least one image among the first image and the second image;
• deformation information obtaining means for obtaining deformation information between the first image and the second image;
• position obtaining means for obtaining a position of interest on the first image and a correspondence position on the second image corresponding to the position of interest on a basis of the deformation information;
• search area setting means for setting a search area made up of the search area size in a surrounding of the correspondence position on the second image;
• projection means for obtaining a deformed search area by projecting, on a basis of the deformation information, the search area onto a deformed image obtained by deforming the second image on a basis of the deformation information;
• and
• difference means for deciding a difference value corresponding to the position of interest on a basis of a density value of the position of interest on the first image and density values of a plurality of positions in the deformed search area on the deformed image.

An image processing apparatus comprising:

• image obtaining means for obtaining a first image and a second image in which a subject is captured;
• position obtaining means for obtaining a position of interest on the first image and a correspondence position on the second image corresponding to the position of interest;
• search area setting means for setting a search area in a surrounding of the correspondence position on the second image;
• and
• difference means for deciding a difference value corresponding to the position of interest on a basis of a density value of the first position on the first image and distribution information of density values in the search area on the second image.

An image processing apparatus comprising:

• image obtaining means for obtaining a first image and a second image in which a subject is captured;
• position obtaining means for obtaining a position of interest on the first image and a correspondence position on the second image corresponding to the position of interest;
• search area setting means for setting a first search area in a surrounding of the position of interest on the first image and setting a second search area in a surrounding of the correspondence position on the second image;
• and
• difference means for deciding a difference value corresponding to the position of interest on a basis of a first difference value based on a density value of the position of interest on the first image and density values of a plurality of positions in the second search area on the second image and a second difference value based on a density value of the correspondence position on the second image and density values of a plurality of positions in the first search area on the first image.

An image processing method comprising:

• an image obtaining step of obtaining a first image and a second image in which a subject is captured;
• a search area size calculation step of calculating a search area size on a basis of a pixel size of at least one image among the first image and the second image;
• a position obtaining step of obtaining a position of interest on the first image and a correspondence position on the second image corresponding to the position of interest;
• a search area setting step of setting a search area made up of the search area size in a surrounding of the correspondence position on the second image;
• and
• a difference step of deciding a difference value corresponding to the position of interest on a basis of a density value of the position of interest on the first image and density values of a plurality of positions in the search area on the second image.