Abstract: The present invention describes a system that enables the monitoring and automatic control of the tolerance in splice overlap of textile ply, through the identification of the overlap area (1a), identification and counting of textile cords (1b) in the referred overlap area, and the generation of a control signal for the remaining manufacturing equipment, based on parameters and criteria defined by the user. The system is composed of: an image acquisition sub-system (2) containing modules of lighting, of artificial vision and respective elements of support, fixation, conditioning and adjustment (3); a quality control computer program constituted by a module of morphologic image analysis for the detection and recognition of the overlap of the ply, detection and counting of cords in the overlap area, a module of support to the decision of acceptance/rejection of the ply based on parameters defined by the user and a module of interface with production equipment.