Methods and apparatus to count people are disclosed. Example apparatus disclosed herein are to populate a list with first characteristic datasets obtained from a first plurality of images, respective ones of the first characteristic datasets representative of corresponding faces. Disclosed apparatus are also to perform comparisons of the first characteristic datasets to each other to determine a first number of unique faces, the comparisons limited to the first characteristic datasets obtained during the first period of time. Disclosed apparatus are further to delete the first characteristic datasets from the list after the first period of time has ended, and re-populate the list with second characteristic datasets obtained from a second plurality of images representative of the environment during a second period of time of the media presentation, the second period of time subsequent to the first period of time.

Methods and apparatus to count people are disclosed. Example apparatus disclosed herein include means for discarding existing characteristic datasets from a list; means for populating the list with first characteristic datasets obtained from a first plurality of images representative of an environment during a first period of time of a media presentation; means for limiting a number of the first characteristic datasets stored in the list for a first location represented in the first plurality of images; and means for comparing the first characteristic datasets to each other to determine a first number of unique faces in the environment during the first period of time, wherein the means for discarding is to delete the first characteristic datasets from the list, and the means for populating is to re-populate the list with second characteristic datasets obtained from a second plurality of images representative of the environment.

An adjustable square has a blade including a scale, a body, a slot formed in the body for movably receiving the blade, a locking mechanism operably engaged with the body for releasably securing the blade within the slot, and an indexing member operably engaged with the body and operably engaged with the blade. The indexing member indexes the body at precise locations along the blade. A method for indexing an adjustable square is also provided. The method includes positioning a body of the adjustable square at a precise known position and indexing, with an indexing member of the adjustable square, the body of the adjustable square at the precise known position.

An adjustable square has a blade including a scale, a body, a slot formed in the body for movably receiving the blade, a locking mechanism operably engaged with the body for releasably securing the blade within the slot, and an indexing member operably engaged with the body and operably engaged with the blade. The indexing member indexes the body at precise locations along the blade. A method for indexing an adjustable square is also provided. The method includes positioning a body of the adjustable square at a precise known position and indexing, with an indexing member of the adjustable square, the body of the adjustable square at the precise known position.

The present invention provides a barber instrumentality useful for verifying, establishing and producing accurate, symmetrical hair lines and hair art designs. In particular, methods are provided herein for the use of the instrumentality wherein precise measurements can be taken to accurately verify, establish and produce symmetrical hair lines and hair art designs on face, forehead, scalp or neck.

An example distance measuring apparatus is provided. The example apparatus may include a housing having an aperture, a reel assembly, a measuring tape, a touch control, an audio output device, an audio input device, and processing circuitry. The processing circuitry may be configured to receive a touch control signal and initiate a measurement acquisition session, receive verbal measurement audio data from the audio input device, perform a speech recognition analysis on the verbal measurement audio data to determine measurement data, and store the measurement data in a memory device.

An example distance measuring apparatus is provided. The example apparatus may include a measuring tape with distance measurement indicia, a camera, and processing circuitry. The processing circuitry may be configured to cause the camera to capture an image of the measuring tape, and determine a measurement by analyzing the captured image. The measurement may be determined based on the distance measurement indicia of the measuring tape within the image at a measurement position. The processing circuitry may be further configured to store the measurement in a memory device.

Methods and apparatus to count people are disclosed. Example apparatus disclosed herein include means for discarding existing characteristic datasets from a list; means for populating the list with first characteristic datasets obtained from a first plurality of images representative of an environment during a first period of time of a media presentation; means for limiting a number of the first characteristic datasets stored in the list for a first location represented in the first plurality of images; and means for comparing the first characteristic datasets to each other to determine a first number of unique faces in the environment during the first period of time, wherein the means for discarding is to delete the first characteristic datasets from the list, and the means for populating is to re-populate the list with second characteristic datasets obtained from a second plurality of images representative of the environment.

A measuring ruler, tape or other instrument having a straight edge located along at least one length of the ruler. The ruler has a first surface having a background color, and a second opposed surface. The ruler also has a set of spaced apart indicia located on the first surface along the at least one length. The indicia are oriented perpendicular to the straight edge. The width of the first indicium and last indicium of a whole number unit measurement length appear half as wide as the width of all remaining fractional indicia.

Methods and apparatus to count people are disclosed. Example people counting apparatus disclosed herein include a difference calculator to calculate a degree of similarity between a first characteristic dataset and a second characteristic dataset representative of face detections in images. Disclosed example people counting apparatus also include a limiter to store the first characteristic dataset and the second characteristic dataset in a plurality of characteristic datasets associated when the degree of similarity does not satisfy a threshold, and to store the first characteristic dataset in the plurality of characteristic datasets and discard the second characteristic dataset when the degree of similarity satisfies the threshold to limit a number of stored characteristic datasets. Disclosed example people counting apparatus further include a comparator to compare the plurality of characteristic datasets to each other to determine a number of unique faces in an environment during a first period of time.