在 OpenCV 中读取像素的 BGR 值
Reading BGR values of pixel in OpenCV
enter image description here我想检测图像中形状的颜色，所以当我 运行 代码
“bgr_list = img[cX,cY]”
我收到此错误：
bgr_list = img[cX,cY]
IndexError: index 648 is out of bounds for axis 0 with size 598
but when I run "bgr_list = img[300,300]" I do not get any error
->where [300,300] is white portion in image
-> where, cX = x-coordinate of centroid and cY = y-coordinate of centroid
-> BGR_list is bgr value of pixel at centroid
-> the size of image is 898x598 pixel
看起来您从某种预处理中获得了 X 和 Y 笛卡尔坐标，但是 numpy opencv 使用的矩阵，使用矩阵索引 (row, column, channel)。您的 X 坐标对应于列索引，Y 坐标对应于您的行索引。
翻转索引应该可以完成工作
bgr_list = img[cY,cX]
enter image description here我想检测图像中形状的颜色，所以当我 运行 代码 “bgr_list = img[cX,cY]” 我收到此错误：
bgr_list = img[cX,cY]
IndexError: index 648 is out of bounds for axis 0 with size 598
but when I run "bgr_list = img[300,300]" I do not get any error
->where [300,300] is white portion in image
-> where, cX = x-coordinate of centroid and cY = y-coordinate of centroid
-> BGR_list is bgr value of pixel at centroid
-> the size of image is 898x598 pixel
看起来您从某种预处理中获得了 X 和 Y 笛卡尔坐标，但是 numpy opencv 使用的矩阵，使用矩阵索引 (row, column, channel)。您的 X 坐标对应于列索引，Y 坐标对应于您的行索引。
翻转索引应该可以完成工作
bgr_list = img[cY,cX]