清空筛选条件
清空筛选条件

Crop image without change aspect ration of original image

1 次查看（过去 30 天）
Malan Jayanka
Malan Jayanka 2016-10-9
评论： Image Analyst 2016-10-9
I want to do these kind of conversion. Output image must be 256*256 pixel. I want to crop image and remain the main leaf part in the output image without change the aspect ratio of original image. Is this possible in matlab?

请先登录，再回答此问题。

回答（1 个）

Walter Roberson
Walter Roberson 2016-10-9
https://www.mathworks.com/help/images/ref/imcrop.html#inputarg_rect
imcrop() and pass a rectangle whose width and height are 256, 256. A section that size will be extracted. The pixel sizes will not have changed, so the aspect ratio of the extracted area will be 1:1 . If you are displaying it afterwards, give the command
axis equal
or
axis image
You do not even need imcrop for this purpose: you can do it by plain array indexing
Extracted = YourImage(First_row : First_row + 255, First_column : First_column + 255, :);
  2 个评论
Malan Jayanka
Malan Jayanka 2016-10-9
编辑：Malan Jayanka 2016-10-9
I have used crop function but I got output like this
But I want to get whole leaf part into 256*256 region
[rgbImage,map] = imread('DSC_0001.jpg');
[heigth,width,dim] = size(rgbImage);
cropedImage = imcrop(rgbImage,map,[2000 1000 256 256]); imshow(cropedImage);
Also plz give me example how to use axis equal
Image Analyst
Image Analyst 2016-10-9
Then that portion is not 256x256 - it's bigger. So crop out a bigger portion, then use imresize() to shrink it down.
croppedImage = imcrop(rgbImage,map,[2000 1000 512 512]);
croppedImage = imresize(croppedImage, [256,256]);

请先登录，再进行评论。

类别

在 Help Center 和 File Exchange 中查找有关 Read, Write, and Modify Image 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by