Picture detection device, picture recording device, picture recording/reproduction device, picture detection method, picture recording method, and picture recording/reproduction method

A picture recording device, comprising:

• an estimation unit, configured to, based on deviations in color information of pixels of a prescribed number of lines in an upper-edge portion, lower-edge portion, left-edge portion, and right-edge portion of a picture frame including a first picture and a second picture displayed on the periphery of the first picture, estimates an edge portion of the picture frame in which the second picture is displayed from among the upper-edge portion, the lower-edge portion, the left-edge portion, and the right-edge portion;
• a detection unit configured to detect the first picture of the picture flame;
• and
• a recording unit configured to record on a recording medium a picture signal of the detected first picture;
• wherein the detection unit moves a borderline detection line from the center of the picture frame toward the estimated edge portion, and detects a borderline between the first picture and the second picture based on a brightness difference of pixels in the vicinity of the borderline detection line, and detects the first picture based on the detected borderline.

A picture recording/reproduction device, comprising:

• an estimation unit, configured to, based on deviations in color information of pixels of a prescribed number of lines in an upper-edge portion, lower-edge portion, left-edge portion, and right-edge portion of a picture frame including a first picture and a second picture displayed on the periphery of the first picture, estimates an edge portion of the picture frame in which the second picture is displayed from among the upper-edge portion, the lower-edge portion, the left-edge portion, and the right-edge portion;
• a detection unit configured to move a borderline detection line from the center of the picture frame toward the estimated edge portion, detect a borderline between the first picture and the second picture based on a brightness difference of pixels in the vicinity of the borderline detection line, and detect the first picture based on the detected borderline;
• a recording unit configured to record on a recording medium a picture signal of the picture frame in association with positional information of the detected borderline in the picture frame;
• and
• a reproduction configured to reproduce the picture signal;
• wherein
• the detection unit configured to detect the first picture in the picture frame recorded on the recording medium, based on the positional information of the borderline recorded in association with the picture signal of the picture frame recorded on the recording medium;
• and
• the reproduction unit configured to reproduce the picture signal of the detected first picture.

A picture detection method, comprising:

• based on deviations in color information of pixels in a prescribed number of lines in an upper-edge portion, lower-edge portion, left-edge portion and right-edge portion of a picture frame including a first picture and a second picture displayed on the periphery of the first picture, estimating an edge portion of the picture frame in which the second picture is displayed from among the upper-edge portion, the lower-edge portion, the left-edge portion, and the right-edge portion;
• moving a borderline detection line from the center of the picture frame toward the estimated edge portion, and based on brightness differences of pixels in the vicinity of the borderline detection line, detecting a borderline between the first picture and the second picture;
• and
• based on the detected borderline, detecting the first picture.

A picture recording method, comprising:

• based on deviations in color information of pixels in a prescribed number of lines in an upper-edge portion, lower-edge portion, left-edge portion and right-edge portion of a picture frame including a first picture and a second picture displayed on the periphery of the first picture, estimating an edge portion of the picture frame in which the second picture is displayed from among the upper-edge portion, the lower-edge portion, the left-edge portion, and the right-edge portion;
• moving a borderline detection line from the center of the picture frame toward the estimated edge portion, and based on brightness differences of pixels in the vicinity of the borderline detection line, detecting a borderline between the first picture and the second picture;
• based on the detected borderline, detecting the first picture;
• and
• recording the picture signal of the detected first picture on a recording medium.

A picture recording/reproduction method, comprising:

• based on deviations in color information of pixels in a prescribed number of lines in an upper-edge portion, lower-edge portion, left-edge portion and right-edge portion of a picture frame including a first picture and a second picture displayed on the periphery of the first picture, estimating an edge portion of the picture frame in which the second picture is displayed from among the upper-edge portion, the lower-edge portion, the left-edge portion, and the right-edge portion;
• moving a borderline detection line from the center of the picture frame toward the estimated edge portion, and based on brightness differences of pixels in the vicinity of the borderline detection line, detecting a borderline between the first picture and the second picture;
• recording the picture signal of the picture frame in association with positional information of the detected borderline in the picture frame on a recording medium;
• based on the positional information of the borderline recorded in association with a picture signal of the picture frame recorded on the recording medium,
• detecting a first picture in the picture frame recorded on the recording medium;
• and
• reproducing the picture signal of the detected first picture.