imresize is blurring my image!

15 次查看（过去 30 天）
Michael
Michael 2013-2-20
Hello
I have a 128x128 matrix and I want to scale it down to 32x32. MATLAB's algorithm "imresize" seems to involve a smoothing filter. My original image has sharp gradients across pixel edges which will remain pixel edges in the new image, but these gradients are being lost by a seemingly overenthusiastic filtering step.
Is there a simple way of simply saying "see this 4x4 box? well that's going to be a single pixel in the new image, so take the mean of these 16 values and ignore everything else around it"?
I could try to code this manually but I'm checking that there isn't a quicker alternative, since it'll take me a while.
Regards, Michael

请先登录，再回答此问题。

采纳的回答

Thorsten
Thorsten 2013-2-20
I = imresize(I, [32 32], 'nearest');
  3 个评论
显示 1更早的评论
Michael
Michael 2013-2-20
Perfect, thanks very much.

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Image Processing Toolbox 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