Fecha de publicación: 07/03/2023 Fuente: WIPO "processing tomato" The invention is suitable for the technical field of soilless culture, and provides a lettuce soilless culture monitoring method based on image processing, and the method comprises the steps: S1, setting a target recognition region mark; s2, acquiring a high-definition image of the hydroponic lettuce in the monitoring range; s3, segmenting the high-definition image into a plurality of identification areas; s4, for each identification area, dividing the identification area into grid areas according to the target identification area mark, and performing grid equal division on each grid area; s5, aiming at each grid region, calculating a growth parameter value; and step S6, outputting the growth level. The lettuce growth condition in the large-area lettuce culture pond can be monitored through a single camera or a small number of cameras, the implementation mode is simple, the cost is low, lettuces in different growth time in the same culture pond can be specifically monitored and evaluated, and finally the production and growth grades are output; the growth grade can reflect the growth condition of the current lettuce, and subsequent analysis of technicians is facilitated.