[译文]ASCII art with C#

ASCII art with C#[/b]

翻译说明:原文版权归作者所有

原文作者:Daniel Fisher (lennybacon)

原文地址:http://www.codeproject.com/aspnet/ascii_art_with_c_.asp

译 者:zitiger http://zitiger.cnblogs.com/


Image _img = Image.FromStream(stream);

Bitmap _image =

new Bitmap(_img, new Size(_img.Width, _img.Height));

_img.Dispose();

Next I grayscale the image - you'll see later why.

接着我把图片灰度化-过会你就知道为什么要这么做了.

Rectangle bounds =

new Rectangle(0, 0, _image.Width, _image.Height);

ColorMatrix _matrix = new ColorMatrix();

_matrix[0,0] = 1/3f;

_matrix[0,1] = 1/3f;

_matrix[0,2] = 1/3f;

_matrix[1,0] = 1/3f;

_matrix[1,1] = 1/3f;

_matrix[1,2] = 1/3f;

_matrix[2,0] = 1/3f;

_matrix[2,1] = 1/3f;

_matrix[2,2] = 1/3f;

ImageAttributes _attributes =

new ImageAttributes();

_attributes.SetColorMatrix(_matrix);

Graphics gphGrey = Graphics.FromImage(_image);

gphGrey.DrawImage(_image,

bounds,

0,

0,

_image.Width,

_image.Height,

GraphicsUnit.Pixel,

_attributes);

gphGrey.Dispose();

O.K. Now, we get to the interesting part.

好了,现在我们就要进入最有意思的部分了.

for(int h=0; h<_image.Height/10; h++)
{
int _startY = (h*10);

for(int w=0; w<_image.Width/5; w++)
{
int _startX = (w*5);
int _allBrightness = 0;

I loop through the image's pixels and because I don't want one ASCII character per pixel, I take one per 10/5. To let every pixel influence the resulting ASCII char, I loop them and calculate the brightness of the amount.

我对图片的像素进行循环,我不想一个ASCII字符代表一个像素,而是代表10/5个(像素).为了让每个

像素效果都能在最终结果的ASCII字符里有所体现,我对代表一个ASCII字符的一组像素进行循环,然后计算它们的亮度和.

(译者:把图片上的所有像素按一定的大小分成N小块,再求出每一小块内所有像素的亮度和.)

for(int y=0; y<10; y++)

{

for(int x=0; x<10; x++)

{

int _cY = y + _startY;

int _cX = x + _startX;

try

{

Color _c = _image.GetPixel(_cX, _cY);

int _b = (int)(_c.GetBrightness() * 10);

_allBrightness = (_allBrightness + _b);

}

catch

{

_allBrightness = (_allBrightness + 10);

}

Finally, I append different ASCII characters based on the calculated amount:

最后,我根据计算出来的和把不同的ASCII字符组合起来.

int _sb = (_allBrightness/10);
if(_sb<25)
{
_asciiart.Append("#");
}
else if(_sb<30)
{

[b]That's all

Thanks to The Code Project and Chris Maunder, newtelligence and greetings to all C# coders out there.

感谢Code Project , Chris Maunder 和 newtelligence,并向所有C#爱好者问好.

译者的理解:

1. 通过Web上传一张图片;

2. 把图片进行灰度化(变成黑白);

3. 把图片划分成N个小块,对每个小块的内像素的亮度进行求和;

4. 根据每个小块的亮度平均值来选择合适的ASCII字符进行组合;

5. 输出.

欢迎杭州的朋友加入杭州.net俱乐部http://zitiger.cnblogs.com/archive/2005/07/28/201584.html.

另:马上大四了,找个实习单位,个人简历http://zitiger.cnblogs.com/archive/2005/07/26/200648.html,限杭州.