读取图像的像素颜色

Question

在VBA中，如何读取图像中每个像素的颜色值？

我在VB 6.0中发现this solution，但它并不直接适用于VBA。

Answer 1

尝试在网站上公布这里的解决方案： http://sim0n.wordpress.com/2009/03/27/vba-q-how-to-get-pixel-colour/

我不得不改变的ByRef到BYVAL但，除了它工作得很好。使用“插入”>“图片”插入图片，并为点击事件分配一个宏。我刚刚将单元格A1的颜色设置为您点击的颜色，但我相信您明白了。

#If VBA7 Then 
    Private Declare PtrSafe Function GetPixel Lib "gdi32" (ByVal hdc As LongPtr, ByVal x As Long, ByVal y As Long) As Long 
    Private Declare PtrSafe Function GetCursorPos Lib "user32" (ByRef lpPoint As POINT) As LongPtr 
    Private Declare PtrSafe Function GetWindowDC Lib "user32" (ByVal hwnd As LongPtr) As LongPtr 
#Else 
    Private Declare Function GetPixel Lib "gdi32" (ByVal hdc As Long, ByVal x As Long,  ByVal y As Long) As Long 
    Private Declare Function GetCursorPos Lib "user32" (ByRef lpPoint As POINT) As Long 
    Private Declare Function GetWindowDC Lib "user32" (ByVal hwnd As Long) As Long 
#End If 
Private Type POINT 
    x As Long 
    y As Long 
End Type 

Sub Picture1_Click() 
    Dim pLocation As POINT 
    Dim lColour As Long 

    Dim lDC As Variant 
    lDC = GetWindowDC(0) 
    Call GetCursorPos(pLocation) 
    lColour = GetPixel(lDC, pLocation.x, pLocation.y) 
    Range("a1").Interior.Color = lColour 
End Sub 

要使用它，将图片放置在工作表中，右键单击图像并将其分配给它。