Abstract: Aspects of the disclosure relate to a method of estimating a length of a queue associated with a resource within a venue. Images of the queue may be received, each image corresponding to a segment of the queue. A server may estimate a number of venue guests in the queue by: for each of a first subset of the images, estimating a number of pixels of the image that correspond to venue guests in the queue; and for each of a second subset of the images, detecting and counting individual venue guests visible in the image. A notification including the estimated number of venue guests in the queue, an estimated current wait time, and/or a time at which a venue guest joining the queue is permitted entry to the resource, may be sent to devices corresponding to venue guests.