清空筛选条件
清空筛选条件

How to change brightness of selected points of an image?

2 次查看（过去 30 天）
Ali Purse
Ali Purse 2018-10-18
回答： Image Analyst 2018-10-18
I know that I can change brightness of an image using following instruction:
I=(readimage);
I1 = I - 100;
imshow(I1);
But I want to know that How can I change brightness of the image just in some specified points? For example a square of the image?

请先登录，再回答此问题。

回答（1 个）

Image Analyst
Image Analyst 2018-10-18
Try ginput():
uiwait(helpdlg('Click a point'));
[x, y] = ginput(1);
row = round(y);
col = round(x);
thisGrayLevel = grayImage(row, col);
grayImage(row, col) = thisGrayLevel ^2;
Beware that if your image is uint8 and the square goes beyond 255, it will clip to 255.

类别

在 Help Center 和 File Exchange 中查找有关 Images 的更多信息

标签

产品

Community Treasure Hunt

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

Start Hunting!

Translated by