下采样而不进行平滑 [英] Downsampling without smoothing

问题描述

在OpenCV 2.3.1中是否存在对图像进行降采样的内置方法，而无需事先进行高斯平滑(由pyrDown C ++函数执行).

Is there a built-in way to downsample an image in OpenCV 2.3.1 without prior Gaussian smoothing (which is performed by pyrDown C++ function).

谢谢.

推荐答案

也许您正在寻找 resize().

# Python code:
import cv2
large_img = cv2.imread('our_large_image.jpg')
small_to_large_image_size_ratio = 0.2
small_img = cv2.resize(large_img, # original image
                       (0,0), # set fx and fy, not the final size
                       fx=small_to_large_image_size_ratio, 
                       fy=small_to_large_image_size_ratio, 
                       interpolation=cv2.INTER_NEAREST)

您可以使用任何这些插值方法.

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