fig7

Figure 7. Schematic diagram of weight measurement based on linear regression. (A) Acquisition of pig images; (B) Extraction of key morphometric features from images, such as body length, chest girth, and shoulder width; (C) Input of extracted morphometric parameters into a regression model for weight prediction; (D) Output of the final predicted weight. TC: Trunk circumference; AC: abdominal circumference; RC: rump circumference; BH: body height; R²: coefficient of determination; RMSE: root mean squared error.