如何将位图的1D字节数组转换为2D字节数组？ [英] How can I convert a 1D byte array of a bitmap into a 2D byte array?

问题描述

我已经编写了一个测试程序并将PNG图像加载到其中，



https://dotnetfiddle.net/XHwp7o



像素格式= 32位颜色

位图分辨率，

宽度= 512像素

高度= 512像素

位图的步幅= 2048像素

偏移或填充=（步幅 - 宽度）=（2048 - 512）= 1336像素。

1D字节数组的大小= 1048576字节



如果我们将Bitmap转换为2D数组会有什么尺寸？



如何将Bitmap的1D字节数组转换为同一Bitmap的2D字节数组？



我有什么试过：



https://dotnetfiddle.net/XHwp7o

I have written a test program and loaded a PNG image into it,

https://dotnetfiddle.net/XHwp7o

Pixel format = 32 bit color
Resolution of the Bitmap,
Width = 512 pixels
Height = 512 pixels
Stride of the Bitmap = 2048 pixels
Offset or Padding = (Stride - Width) = (2048 - 512) = 1336 pixels.
Size of the 1D byte array = 1048576 bytes

What would be the dimensions if we convert the Bitmap to a 2D array?

How can I convert a 1D byte array of a Bitmap into a 2D byte array of the same Bitmap?

What I have tried:

https://dotnetfiddle.net/XHwp7o

推荐答案

首先，在您的位图属性报告中有一些注意事项：



1.步幅通常以字节为单位报告，而不是像素。

2.每个像素为4个字节（32位）。

3.这意味着您的偏移或填充将为0（2048字节 - 512 * 4字节）。



位图的每一行将是512 * 4 = 2018字节，并且将有512行。这意味着只需将1D字节数组的每个连续2048字节复制到2D数组的每一行。

Firstly, there are a few things to note in your report of the bitmap attributes:

1. Stride is usually reported in bytes, not pixels.
2. Each pixel is 4 bytes (32 bits).
3. This means that your offset or padding will be 0 (2048 bytes - 512*4 bytes).

Each row of your bitmap will be 512 * 4 = 2018 bytes, and there will be 512 rows. This means that it is simply a case of copying each sequential 2048 bytes of your 1D byte array into each row of the 2D array.

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