代码如下:
import cv2
import numpy as npimg np.zeros((256, 256), np.uint8)for i in range(0,16):for j in range(0,16):img[i*16:(i1)*16][j*16:(j1)*16]i*16jcv2.imwrite(result.jpg, img)
效果如下:
PointCore: Efficient Unsupervised Point Cloud Anomaly Detector Using Local-Global Features 1、Background
当前的点云异常检测器可以分为两类:
(1)基于重建的方法,通过自动编码器重建输入点云数据,并通过比较原…
1 梯度下降 f ( x Δ x , y Δ y ) ≃ f ( x , y ) ∂ f ( x , y ) ∂ x Δ x ∂ f ( x , y ) ∂ y Δ y f(x\Delta x,y\Delta y) \simeq f(x,y)\frac{\partial f(x,y)}{\partial x}\Delta x\frac{\partial f(x,y)}{\partial y}\Delta y f(xΔx,yΔy)≃f(x,y)∂x∂f(x,y)…