Image processing apparatus, method, and program for detecting still-zone area

A method of processing an image in an image processing apparatus for detecting, from an input image, a still-zone area disposed at an edge of the input image and displaying a same image continuously, the apparatus including:

• a difference calculation means for calculating a difference between pixel values of pixels located at a same position of the input image in frames different with each other for each pixel of the input image;
• a pixel-motion-information generation means for generating pixel-motion information indicating whether there is a change in the pixel values of the pixels of the input image on the basis of the difference;
• a detection means for comparing the pixel-motion information of a plurality of the pixels arranged in a predetermined direction, and detecting a boundary position in the predetermined direction between the still-zone area and an effective area excluding the still-zone area in the input image;
• a line-motion-information generation means for generating line-motion information indicating whether there is a change in a pixel value of a pixel constituting a line including pixels arranged in the first direction in the input image;
• and a second detection means for comparing the line-motion-information of a plurality of the lines arranged in a second direction perpendicular to the first direction in the input image, and detecting a boundary position in the second direction between the still-zone area and an effective area excluding the still-zone area in the input image, the method comprising the steps of:
• the difference calculation means calculating a difference between pixel values of the pixels of the input image;
• the pixel-motion-information generation means generating pixel-motion information on the basis of the difference;
• the detection means comparing the pixel-motion information of the plurality of the pixels, and detecting a boundary position in the predetermined direction;
• the line-motion-information generation means generating line-motion information indicating whether there is a change in a pixel value of a pixel constituting a line including pixels arranged in the first direction in the input image;
• and
• the second detection means comparing the line-motion-information of a plurality of the lines arranged in a second direction perpendicular to the first direction in the input image, and detecting a boundary position in the second direction between the still-zone area and an effective area excluding the still-zone area in the input image.

A non-transitory computer readable medium having stored there on an image processing program for detecting, from an input image, a still-zone area disposed at an edge of the input image and displaying a same image continuously, the program for causing a computer to perform processing comprising the steps of:

• calculating a difference between pixel values of pixels located at a same position of the input image in frames different with each other for each pixel of the input image;
• generating pixel-motion information indicating whether there is a change in the pixel values of the pixels of the input image on the basis of the difference;
• comparing the pixel-motion information of a plurality of the pixels arranged in a predetermined direction in the input image, and detecting a boundary position in the predetermined direction between the still-zone area and an effective area excluding the still-zone area in the input image;
• generating line-motion information indicating whether there is a change in a pixel value of a pixel constituting a line including pixels arranged in the first direction in the input image;
• and
• comparing the line-motion-information of a plurality of the lines arranged in a second direction perpendicular to the first direction in the input image, and detecting a boundary position in the second direction between the still-zone area and an effective area excluding the still-zone area in the input image.

An image processing apparatus detecting, from an input image, a still-zone area disposed at an edge of the input image and displaying a same image continuously, the apparatus comprising:

• a difference calculation mechanism calculating a difference between pixel values of pixels located at a same position of the input image in different frames with each other for each pixel of the input image;
• a pixel-motion-information generation mechanism generating pixel-motion information indicating whether there is a change in the pixel values of the pixels of the input image on the basis of the difference;
• a first detection mechanism comparing the pixel-motion information of a plurality of the pixels arranged in a first direction in the input image, and detecting a boundary position in the first direction between the still-zone area and an effective area excluding the still-zone area in the input image;
• a line-motion-information generation mechanism generating line-motion information indicating whether there is a change in a pixel value of a pixel constituting a line including pixels arranged in the first direction in the input image;
• and
• a second detection mechanism comparing the line-motion-information of a plurality of the lines arranged in a second direction perpendicular to the first direction in the input image, and detecting a boundary position in the second direction between the still-zone area and an effective area excluding the still-zone area in the input image.