基于数学形态学的牛肉图像中背长肌分割和大理石纹提取技术研究

Segmentation of longissimus dorsi and marbling in ribeye imaging based on mathematical morphology

牛肉图像中背长肌区域的分割和大理石纹提取是利用计算机视觉评定牛肉胴体等级的重要步骤。研究了利用数学形态学的方法来分割牛肉眼肌切面图像中背长肌区域并将大理石纹提取出来的技术。眼肌切面图像经过去除背景并进行肌肉和脂肪像素识别等预处理后,再用形态学腐蚀与膨胀相结合获得背长肌区域图像,通过图像逻辑运算提取大理石纹。结果表明,这种方法能有效地把背长肌区域与其周围肌肉组织分离开来并提取大理石纹。

Longissimus dorsi is the object of inspection for beef carcass grading based on computer vision, and marbling is a major index. Because locating the longissimus dorsi is an important requirement of a computer grading system, it is necessary to segment longissimus dorsi from ribeye imaging. The paper introduced a method to segment the area of longissimus dorsi and extract marbling from ribeye imaging based on mathematic morphology. Pretreatment of ribeye imaging was obtained after removing the background color and separating fat pixel from muscle pixel, and the morphology filter was used to separate all objects clearly. After then the area of longissimus dorsi was obtained by repeated using the operation of dilation and erosion. The marbling was extracted by using logic operation.