Abstract: The pertinence of digital image material is analysed in respect of matching a given reference. A color of the reference constitutes a reference record in a perceptual color space. Pixels of a piece of digital image material are converted into the perceptual color space, and labelled according to how their converted pixel values belong to environments of principal colors in the perceptual color space. A connected set of pixels is selected that have at least one common label. A subset of the connected set of pixels is determined, so that the pixel(s) of the subset are those for which a color similarity distance to the reference record is at an extremity. For the connected set of pixels, a representative color is selected among or derived from the color or colors of the pixels that belong to the subset.

Abstract: The detected movements of an object are analyzed. Each location record includes coordinates of a detected or assumed location of the object and time information. For a number of location records, there is calculated a location-record-specific descriptor value that becomes the more significant the more densely there are other location records around the location record for which the descriptor value is calculated. After selecting a location record that has the most significant descriptor value, those other location records are found that according to their time information are the latest and earliest in a certain environment. The analysis result is that the object stopped at the coordinates of the selected location record for a stopping time calculated from the time information of the latest and earliest location records.

Abstract: The detected movements of an object are analyzed. Each location record includes coordinates of a detected or assumed location of the object and time information. For a number of location records, there is calculated a location-record-specific descriptor value that becomes the more significant the more densely there are other location records around the location record for which the descriptor value is calculated. After selecting a location record that has the most significant descriptor value, those other location records are found that according to their time information are the latest and earliest in a certain environment. The analysis result is that the object stopped at the coordinates of the selected location record for a stopping time calculated from the time information of the latest and earliest location records.

Abstract: The pertinence of digital image material is analyzed in respect of matching a given reference. A color of the reference constitutes a reference record in a perceptual color space. Pixels of a piece of digital image material are converted into the perceptual color space, and labelled according to how their converted pixel values belong to environments of principal colors in the perceptual color space. A connected set of pixels is selected that have at least one common label. A subset of the connected set of pixels is determined, so that the pixel(s) of the subset are those for which a color similarity distance to the reference record is at an extremity. For the connected set of pixels, a representative color is selected among or derived from the color or colors of the pixels that belong to the subset.

Abstract: The pertinence of digital image material is analysed in respect of matching a given reference. A color of the reference constitutes a reference record in a perceptual color space. Pixels of a piece of digital image material are converted into the perceptual color space, and labelled according to how their converted pixel values belong to environments of principal colors in the perceptual color space. A connected set of pixels is selected that have at least one common label. A subset of the connected set of pixels is determined, so that the pixel(s) of the subset are those for which a color similarity distance to the reference record is at an extremity. For the connected set of pixels, a representative color is selected among or derived from the color or colors of the pixels that belong to the subset.