SingTown AI Vision automatically identifies nuts, enabling roasting machines to precisely control temperature.

In intelligent roasting equipment, different materials (such as peanuts, sunflower seeds, chestnuts, etc.) require matching with distinct heating curves and stirring strategies. Manual configuration is not only time-consuming but also prone to errors. To achieve automation and precise control of the roasting process, roasting robot manufacturers plan to adopt SingTown Technology's OpenMV smart camera to build a machine vision-based material recognition system.

The system captures images of raw materials inside the hopper via a camera, automatically identifies the type of food currently placed, and then calls the corresponding frying program. The primary recognition targets are nut-based foods with particle sizes ranging from 1 to 5 centimetres. The camera is installed above the equipment and can capture the contents of the hopper within an adjustable distance. The system must be capable of distinguishing between different varieties such as peanuts, sunflower seeds, and chestnuts, maintaining stable recognition even with minor positional deviations or angle variations. The goal is to enable the robot to automatically identify material types, achieve unmanned feeding and intelligent frying matching, and enhance the equipment's level of intelligence and user experience.

The manufacturer of roasted snack robots utilizes SingTown Technology's OpenMV intelligent camera-based material recognition system, which integrates AI image recognition, colour and texture analysis, and machine learning classification algorithms to automatically identify material types in real time.

The system captures images of the material bin using high-resolution cameras and analyzes and classifies the colour, texture, and shape characteristics of raw materials such as peanuts, sunflower seeds, and chestnuts through colour space conversion (RGB-HSV) and morphological feature extraction algorithms. By training sample models, the system can quickly determine the type of material in the current bin, output corresponding identification signals, and automatically match the robot frying program.

During the detection process, the OpenMV embedded vision module can automatically adjust exposure and white balance according to different lighting conditions to maintain stable and accurate recognition. Even if the material position in the hopper deviates or piles up, the system can accurately identify it through region segmentation and multi-feature fusion algorithms (colour + texture + contour shape). The recognition results are sent to the main control microcontroller via serial port or bus to achieve automatic parameter switching.

Field test data indicates that the system achieves over 95% recognition accuracy for three common roasted snack ingredients (peanuts, sunflower seeds, chestnuts) under standard lighting conditions, with a response time under 0.5 seconds.

SingTown OpenMV intelligent camera features low cost, easy deployment, and strong anti-interference capability. It is suitable for edge deployment in various equipment such as roasting machines, nut packaging machines, and food sorting systems, assisting the food automation processing industry in upgrading towards intelligence.