Question

vb.net怎么使图像灰度化再输出

Answer 1

在web上可以使用HTML5的特效实现。
在windows forms里面可以直接修改设置图片的属性。
Try
' 图片位置初始化一个image1
Dim image1 As New Bitmap(
"C:\Documents and Settings\All Users\Documents\My Music\music.bmp",
True)

Dim x, y As Integer

' Loop through the images pixels to reset color.
For x = 0 To image1.Width - 1
For y = 0 To image1.Height - 1
Dim pixelColor As Color = image1.GetPixel(x, y)
Dim newColor As Color =
Color.FromArgb(pixelColor.R, 0, 0)
image1.SetPixel(x, y, newColor)
Next
Next

' Set the PictureBox to display the image.
PictureBox1.Image = image1

' Display the pixel format in Label1.
Label1.Text = "Pixel format: " + image1.PixelFormat.ToString()

Catch ex As ArgumentException
MessageBox.Show("There was an error." _
& "Check the path to the image file.")
End Try