A file generating device (100) extracts, when a captured image captured by an image capturing device is acquired, based on the acquired captured image, a shape of an object included in the captured image and generates, based on the extracted shape, text information that includes a drawing indication of the shape. The information processing apparatus (200) refers to a storage unit that stores therein, regarding each of a plurality of objects, identification information on the objects in association with the text information that includes a drawing indication of the objects and acquires identification information on an object, from among the plurality of objects, that is associated with the text information in which similarity to the generated text information satisfies a criterion.

Techniques are described for identifying correspondences between images to generate a fundamental matrix for the camera positions related to the images. The resultant fundamental matrix enables epipolar geometry to correlate common features among the images. Correspondences are identified by confirming feature matches across images by applying a homography to data representing features across images. Further techniques are described herein for generating a representation of a boundary of a feature of a structure based on a digital image. In one or more embodiments, generating a representation of a boundary of a particular feature in a digital image comprises determining a portion of the image that corresponds to the structure, and determining a portion of the image that corresponds to the particular feature. One more vanishing points are associated with the portion of the image corresponding to the particular feature. The one or more vanishing points are used to generate a set of bounding lines for the particular feature, based on which the boundary indicator for the feature is generated.

Techniques are described for identifying correspondences between images to generate a fundamental matrix for the camera positions related to the images. The resultant fundamental matrix enables epipolar geometry to correlate common features among the images. Correspondences are identified by confirming feature matches across images by applying a homography to data representing features across images. Further techniques are described herein for generating a representation of a boundary of a feature of a structure based on a digital image. In one or more embodiments, generating a representation of a boundary of a particular feature in a digital image comprises determining a portion of the image that corresponds to the structure, and determining a portion of the image that corresponds to the particular feature. One more vanishing points are associated with the portion of the image corresponding to the particular feature. The one or more vanishing points are used to generate a set of bounding lines for the particular feature, based on which the boundary indicator for the feature is generated.

Manufacturing of a shoe is enhanced by creating 3-D models of shoe parts. For example, a laser beam may be projected onto a shoe-part surface, such that a projected laser line appears on the shoe part. An image of the projected laser line may be analyzed to determine coordinate information, which may be converted into geometric coordinate values usable to create a 3-D model of the shoe part. Once a 3-D model is known and is converted to a coordinate system recognized by shoe-manufacturing tools, certain manufacturing steps may be automated.

According to one embodiment, a reading system includes an extractor, a generator, a corrector, and a reader. The extractor extracts a first candidate region from an input image. The first candidate region is of a candidate of a region in which a meter is imaged. The generator generates a rectangle around the first candidate region when an exterior form of the first candidate region is circular. The rectangle corresponds to the exterior form of the first candidate region. The corrector generates a second candidate region by using the generated rectangle to correct the exterior form of the first candidate region to approach a perfect circle. The reader reads, from the second candidate region, a numerical value indicated by the meter.

According to one embodiment, a reading system includes an extractor, a generator, a corrector, and a reader. The extractor extracts a first candidate region from an input image. The first candidate region is of a candidate of a region in which a meter is imaged. The generator generates a rectangle around the first candidate region when an exterior form of the first candidate region is circular. The rectangle corresponds to the exterior form of the first candidate region. The corrector generates a second candidate region by using the generated rectangle to correct the exterior form of the first candidate region to approach a perfect circle. The reader reads, from the second candidate region, a numerical value indicated by the meter.

Various embodiments provide a polygonal region detection method and apparatus, a computer readable storage medium and an electronic device. In those embodiments, a to-be-detected image can be obtained. A plurality of line segments in the image can be calculated based on a line detection algorithm. The plurality of line segments meeting a merging condition can be merged into a line segment. Crosspoints of the pairwise merged line segments can be calculated according to the merged line segments in the image. A polygonal region can be generated with the crosspoints as vertexes of the polygonal region in the image.

Various embodiments provide a polygonal region detection method and apparatus, a computer readable storage medium and an electronic device. In those embodiments, a to-be-detected image can be obtained. A plurality of line segments in the image can be calculated based on a line detection algorithm. The plurality of line segments meeting a merging condition can be merged into a line segment. Crosspoints of the pairwise merged line segments can be calculated according to the merged line segments in the image. A polygonal region can be generated with the crosspoints as vertexes of the polygonal region in the image.

A system for presenting video signals related to a marker image on a surface of a sports ball structured by a plurality of panels includes a computing device having a camera, and a server linked to the computing device via internet, the server being arranged to store the video signals related to the maker image, wherein programs running on the computing device includes the steps to obtain the maker images captured by the camera, extract a digital watermark embedded from the marker image, the digital watermark being positioned on a part of a curved surface of the plurality of panels formed by sewing, access the server to search the video signals corresponding to information in the digital watermark, receive the video signals from the server; and display the received video signals on the display in the computing device.

A system for presenting video signals related to a marker image on a surface of a sports ball structured by a plurality of panels includes a computing device having a camera, and a server linked to the computing device via internet, the server being arranged to store the video signals related to the maker image, wherein programs running on the computing device includes the steps to obtain the maker images captured by the camera, extract a digital watermark embedded from the marker image, the digital watermark being positioned on a part of a curved surface of the plurality of panels formed by sewing, access the server to search the video signals corresponding to information in the digital watermark, receive the video signals from the server; and display the received video signals on the display in the computing device.