Abstract: Systems and methods for improving accuracy of detecting characteristics of an image in an image detection system. The methods comprise: capturing, by a camera, at least one image or video showing one or more customers in a facility; performing image or video analysis to identify words that define emotions of the one or more customers shown in the at least one image or video; translating the identified words to numerical values in accordance with a pre-defined symbol coding scheme; and combining the numerical values to derive a customer sentiment value for the one or more customers in the at least one image or video.