Image processing apparatus, method, and program

An image processing method comprising:

• acquiring an image;
• obtaining a label image having a same size as that of the acquired image;
• setting a target region in the acquired image;
• setting a local region containing a pixel of interest and included in the target region;
• calculating, for each local label value, reliability indicating a degree that a pixel of interest seems to belong to a label value by using information of a luminance or color of a local label value region, the local label value region having the label value and included in the local region;
• deciding, based on the reliability for each local label value, a label value to which the pixel of interest belongs, and applying, to the target region, the deciding the label value;
• and
• outputting a label image obtained by the deciding the label value.

An image processing apparatus comprising:

• an acquiring unit configured to acquire an image including an object and a background, and an initial region including an object region containing the object and a background region containing the background;
• a setting unit configured to set a target region including the initial region in the image, and a local region containing a pixel of interest and included in the target region;
• a calculating unit configured to calculate local object reliability indicating a degree that the pixel of interest seems to belong to the object region and local background reliability indicating a degree that the pixel of interest seems to belong to the background region by using information of a luminance or color of a local object region and information of a luminance or color of a local background region, respectively, the local object region including the object region and the local region and the local background region including the background region and the local region;
• a deciding unit configured to decide that the pixel of interest belongs to one of the object region and the background region, based on the local object reliability and the local background reliability;
• and
• an outputting unit configured to output region information representing the one of the object region and the background region which is decided by the deciding unit.

An image processing apparatus comprising:

• an acquiring unit configured to acquire an image;
• an obtaining unit configured to obtain a label image having a same size as that of the acquired image;
• a setting unit configured to set a target region in the acquired image and a local region containing a pixel of interest and included in the target region;
• a calculating unit configured to calculate, for each local label value, reliability indicating a degree that a pixel of interest seems to belong to a label value by using information of a luminance or color of a local label value region, the local label value region having the label value and included in the local region;
• a deciding unit configured to decide, based on the reliability for each local label value, a label value to which the pixel of interest belongs;
• and
• an outputting unit configured to output a label image obtained by the deciding unit.

An image processing program stored in a computer readable medium comprising:

• means for instructing a computer to acquire an image including an object and a background and an initial region including an object region containing the object and a background region containing the background;
• means for instructing a computer to set a target region including the initial region in the image, and a local region containing a pixel of interest and included in the target region;
• means for instructing a computer to calculate local object reliability indicating a degree that the pixel of interest seems to belong to the object region and local background reliability indicating a degree that the pixel of interest seems to belong to the background region by using information of a luminance or color of a local object region and information of a luminance or color of a local background region, respectively, the local object region including the object region and the local region and the local background region including the background region and the local region;
• means for instructing a computer to decide that the pixel of interest belongs to one of the object region and the background region, based on the local object reliability and the local background reliability;
• and
• means for instructing a computer to output region information representing the one of the object region and the background region which is decided by the deciding means.

An image processing program stored in a computer readable medium comprising:

• means for instructing a computer to acquire an image;
• means for instructing a computer to obtain a label image having a same size as that of the acquired image;
• means for instructing a computer to set a target region in the acquired image and a local region containing a pixel of interest and included in the target region;
• means for instructing a computer to calculate, for each local label value, reliability indicating a degree that a pixel of interest seems to belong to a label value by using information of a luminance or color of a local label value region, the local label value region having the label value and included in the local region;
• means for instructing a computer to decide, based on the reliability for each local label value, a label value to which the pixel of interest belongs;
• and
• means for instructing a computer to output a label image obtained by the deciding means.