How I can change the more than one pixel values in gray scale image ?

Question

TURI 2012-10-26

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/51948-how-i-can-change-the-more-than-one-pixel-values-in-gray-scale-image

% I have gray image X (480x640 double), having values between 0 and 0 to 1, I want to change the values of all pixel to 1 that are closer to 1 and change values of all pixel to 0 that are near to 0.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Image Analyst 2012-10-26

Why did you post a duplicate when you already had this: http://www.mathworks.com/matlabcentral/answers/51939-how-i-can-change-the-certain-pixel-values-in-gray-scale-image?

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2012-10-26

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/51948-how-i-can-change-the-more-than-one-pixel-values-in-gray-scale-image#answer_63316

编辑：Image Analyst 2012-10-26

在 MATLAB Online 中打开

Copying my answer from your duplicate question at http://www.mathworks.com/matlabcentral/answers/51939-how-i-can-change-the-certain-pixel-values-in-gray-scale-image:

Well, you shouldn't have accepted that answer so quickly if it didn't do what you asked. Here's how to "change the values of certain pixel to 1 that are closer to 1 and want to change values to 0 that are near to 0:

yourImage = yourImage >= 0.5;

3 个评论
显示 1更早的评论隐藏 1更早的评论

Image Analyst 2012-10-26

在 MATLAB Online 中打开

I'm not sure what you mean.

Here's an example:

yourImage = rand(3)
yourImage = yourImage >= 0.5

and in the command window.

yourImage =
         0.964888535199277         0.957166948242946         0.141886338627215
         0.157613081677548         0.485375648722841         0.421761282626275
         0.970592781760616           0.8002804688888         0.915735525189067
yourImage =
     1     1     0
     0     0     0
     1     1     1

as you can see, it changed values that are closer to 0 into 0, and values that are closer to 1 into 1, just exactly what you asked. By the way, it also works for any range of values, not just values in between 0 and 1. So, given the yourImage above, what values would you want them to be changed into?

TURI 2012-10-29

Let say I have image I= [0 0 0 0.0500 0.0512 0.0473 0.0774 0.0735 0.0735 0.0774 0.0774 0.0735 0.0774 0.0735 0.0747 ] Now i wanna change all similar pixel like 0.0735 to my desire color let say red/white. please write the code with comment so i can understand. Thanks

请先登录，再进行评论。