桌面上与图像上的点相对应的点 [英] a point on the desktop corresponding to a point on an image

问题描述

大家好
我有一个桌面图像，图像尺寸小于桌面尺寸
如何在桌面上找到与图像中的点相对应的点?

hi all
i have an image of the desktop,the image size is smaller than the desktop size
how can i find a point on the desktop corresponding to the a point in the image

推荐答案

请参阅我对问题的评论.在这两种情况下，对于应届毕业生而言，这都不是问题.这意味着线性方程组的解决方案对中学生或初中生都有效(取决于您的学校系统，但要求的水平大大低于大专，大学或技术学校学生的入学水平).减少了解决像
这样的方程式的能力

Please see my comment to the question. In both cases, this is not a problem for gradate students. It means the solution of linear equations which is a work for middle school or early high school student (it depends on your school system, but it requires level well below the required entry level of a college, university or a technical school student). It''s reduced to the ability to solve equations like

<br />
X<sub>1</sub> = X<sub>0</sub> + K × X<sub>2</sub><br />
Y<sub>1</sub> = Y<sub>0</sub> + K × Y<sub>2</sub><br />

醒来并解决它们.

—SA

Wake up and solve them.

—SA

假设您在图像上相对于图像的左上角有一个点(相对于图像坐标而言)，那么这很简单缩放比例:

X _桌面 = X _图像 *(宽度_桌面/宽度_图像)

Y _桌面 = Y _图像 *(高度_桌面/高度_图像)

显然，您不一定要精确到该点-取决于相对大小，会出现一两个像素的误差.

Assuming you have a point on the image relative to the top left hand corner of the image in terms of image coordinates, then it is a simple matter of scaling:

X_desktop = X_image * (Width_desktop / Width_image)

Y_desktop = Y_image * (Height_desktop / Height_image)

Obviously, you won''t necessarily get to exactly that point - there will be an error of a pixel or two depending on the relative sizes.

让图像上点的坐标为x ，y.这样您在桌面上的对应点就会像这样.

新点=新点(x *桌面宽度/图像宽度，y *目标高度/图像高度)

从理论上讲，但是我希望您能理解我的意思.如果您不回答，则答复.

Let the coordinates of point on image be x,y. Then your corresponding point on desktop will be like this.

new point = new point(x* Desktopwidth/imagewidth,y*Desktopheight/imageheight)

This is in theory, but i hope you get my point. If you don''t then reply.

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