How to downsize image in x and y direction?

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john karli
john karli 2021-11-24
评论： KSSV 2021-11-25
I have image with size 484x680 and i want to downsize with fector 2. final size should be 241x340.
i have tried it but it downsized in only one direction
img = imread('img')
new_img2 = downsample(img, 2);
imshow(new_img2)
I have also uplod the result of imshow(new_img2) which is img2

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采纳的回答

KSSV
KSSV 2021-11-24
编辑：KSSV 2021-11-24
Read about imresize.
img = imread('img')
new_img2 = imresize(img, 1/2);
imshow(new_img2)
  2 个评论
KSSV
KSSV 2021-11-25
downsample skips the elements by the input N given by user. imresize does interpolation and reduces/ increases the dimensions/ size.

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更多回答（1 个）

yanqi liu
yanqi liu 2021-11-25
Ran in:
yes, sir，may be use
clc; clear all; close all;
img = imread('https://ww2.mathworks.cn/matlabcentral/answers/uploaded_files/811604/img1.png');
new_img2 = img(1:2:end,1:2:end,:);
imshow(new_img2)

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