Definition reading red pixels from picture

    def checkRedPointsToArray(self, img_x, img_y, image,):
        a = np.empty([img_x,img_y])

        high_red_px_color=0
        high_red_px_value=0

        #check for heigth
        for i in range(1,img_y):

        #check for width
            for j in range(1,img_x):
                px_red = image[i,j,2]

                if (high_red_px_color < px_red and px_red > 60):
                    high_red_px_color = px_red
                    high_red_px_value = j

            np.insert(a,high_red_px_value,i)

            high_red_px_color = 0
            high_red_px_value = 0

        return a