Question

我创建了一个重新着色功能来重新着色我的图片框，

我的功能是红色的，它会把所有东西变成红色。

但现在我想输入一些滚动条功能来控制它。

如果我想要3个滚动条代表R，G，B

我如何根据我目前的功能做到这一点？

    Try
        ' Retrieve the image.
        image1 = New Bitmap("C:\Users\Anons\Desktop\Winter.jpg", 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
End Sub$

Answer 1

您只需要将所有三个颜色分量（R，G和B）乘以由滚动条确定的小数系数。例如，因子1将使其保持相同的颜色。系数为0.5会使颜色变亮一半。系数为2会使亮度增加两倍等等。

Dim rFactor As Single = rScroll.Value / 100
Dim gFactor As Single = gScroll.Value / 100
Dim bFactor As Single = bScroll.Value / 100
Dim newColor As Color = Color.FromArgb(pixelColor.R * rFactor, pixelColor.R * gFactor, pixelColor.B * bFactor)

如何扩展此重新着色功能？

1 个答案: