Getting or Setting Pixels

Getting or Setting Pixels

The safe (slow) way

• Suppose you are working on an Image<Bgr, Byte>. You can obtain the pixel on the y-th row and x-th column by calling

Bgr color = img[y, x];

• Setting the pixel on the y-th row and x-th column is also simple

img[y,x] = color;

The fast way

The Image pixels values are stored in the Data property, a 3D array. Use this property if you need to iterate through the pixel values of the image.

For example, in an grayscale image (Image<Gray, Byte>), instead of doing this:

Gray byCurrent = imageGray[x, y];

You would do this:

Byte byCurrent = imageGray.Data[x, y, 0];

Getting or Setting Pixels

原文：http://www.cnblogs.com/visionfeng/p/5479663.html