How to get the pixel and chek them for a pirticular color

i m making a digital image processing assigment.
what i want is that i have to draw a closed selection on
a picture in a picture box..

this i have done ..but i need that all color inside
the selction then would be black and out side the selection would be white..

but i am puzzeled how to do it .. can n e one willing
to help me i m writing my code .

I m drawing the line in a perticular color and cheking it in a function mask that if this perticualr combination of color exist then till another this type of color exist make the color black i.e 0 else every other thing is black.. but its not working.. :(

VB Code:

Private Sub Picture1_MouseMove(Button As Integer, Shift As Integer, x As Single, Y As Single)
    If Button = 1 Then Picture1.Line (A, B)-(x, Y), RGB(100, 195, 155)
    A = x: B = Y
End Sub
 
Private Sub Picture1_MouseUp(Button As Integer, Shift As Integer, x As Single, Y As Single)
    If Button = 1 Then Picture1.Line (x, Y)-(x + 15, Y + 15)
End Sub
 
Private Sub mask(ByVal picColor As PictureBox)
    Picture2 = Picture1
 Dim x, Y, countz As Integer
 Dim red, green, blue, gray As Byte
    GetObject picColor.Image, Len(bm), bm
    wid = bm.BMPWidth
    hgt = bm.BMPHeight
    ReDim bytes(0 To bm.BMPWidthBytes - 1, 0 To hgt - 1)
    GetBitmapBits picColor.Image, bm.BMPWidthBytes * bm.BMPHeight, bytes(0, 0)
 
ProgressBar1.Min = 0
ProgressBar1.Max = hgt - 1
    ' Convert the data to gray scale.
    For Y = 0 To hgt - 1
        For x = 0 To wid - 1 Step 3
            ' Get the current pixel value.
            red = bytes(x * 3, Y)
            green = bytes(x * 3 + 1, Y)
            blue = bytes(x * 3 + 2, Y)
            While (red = 100) And (green = 195) And (blue = 155)
            bytes(x * 3, Y) = 0
            bytes(x * 3 + 1, Y) = 0
            bytes(x * 3 + 2, Y) = 0
            Wend
            bytes(x * 3, Y) = 255
            bytes(x * 3 + 1, Y) = 255
            bytes(x * 3 + 2, Y) = 255
            Next x
            ProgressBar1.Value = Y
        Next Y
 
    ' Set the new pixel values.
    SetBitmapBits picColor.Image, _
    bm.BMPWidthBytes * bm.BMPHeight, bytes(0, 0)
    picColor.Picture = picColor.Image
 
 
End Sub

not any buddu willing 2 help me :(

Well, since your request is that the outside be entirely white
while the inside be entirely black, you should just get the
x1,x2,,y1,y2 coordinates of the selection then just make a black
square over the white sqaure. I didn't read your code yet, but i
will now. :)

I'm no graphics developer, but i say your code sucks. Just kidding.
To be honest, i have no idea what your code means. It seems
immensely complicated.

uh, you could create an array of booleans which then stated which ones are selected and which ones arnt

VB Code:

for i = 1 to picture1.width
for j= 1 to picture1.height
if selected(i,j) = true then
picture1.pset (i,j),vbwhite
else
picture1.pset (i,j),vbblack
end if
next j
doevents
next i

it woudl be a pain to set up the selected array, but it obviously can be done...

sry if thats nto what you want, that was just my interpetation of your problem after reading the post several times.

Off Subject: How did u get the archon image as ur avatar

uploading is always a method

Quote:

---

Originally posted by Mushroom Realm
Off Subject: How did u get the archon image as ur avatar

---

I ripped the GIF file from the StarCraft.MPQ. ;)

Some of the units also have their animated portrats on blizzard's starcraft strat guide. Its located at: http://www.battle.net/scc/

I had a quick mess about and the following code checks for when a shape has been closed and then does as you requested.

The code isn't perfect but hopefully it will be useful to you. :D

Option Explicit
Private Declare Function GetPixel Lib "gdi32" (ByVal hdc As Long, ByVal X As Long, ByVal Y As Long) As Long
Private lXPos As Long, lYPos As Long

Private Sub picDisplay_MouseMove(Button As Integer, Shift As Integer, X As Single, Y As Single)
Dim lXCount As Integer, lYcount As Integer
Dim lLineStart As Long, lLineEnd As Long
Dim bBorderFound As Boolean

If Button = vbLeftButton Then
picDisplay.Line (lXPos, lYPos)-(X, Y), RGB(100, 195, 155)

If GetPixel(picDisplay.hdc, X / 15, Y / 15) = 10208100 Then
For lYcount = 1 To picDisplay.Height Step 15
bBorderFound = False
lLineStart = 0
lLineEnd = 0

For lXCount = 1 To picDisplay.Width Step 15
If GetPixel(picDisplay.hdc, lXCount / 15, lYcount / 15) = 10208100 Then bBorderFound = True

If bBorderFound = True Then
lLineStart = lXCount + 1
Exit For
Else
picDisplay.PSet (lXCount, lYcount), RGB(255, 255, 255)
End If
Next 'lXCount

bBorderFound = False

For lXCount = picDisplay.Width To 1 Step -15
If GetPixel(picDisplay.hdc, lXCount / 15, lYcount / 15) = 10208100 Then bBorderFound = True

If bBorderFound = True Then
lLineEnd = lXCount - 1
Exit For
Else
picDisplay.PSet (lXCount, lYcount), RGB(255, 255, 255)
End If
Next 'lXCount

If lLineEnd > lLineStart Then
picDisplay.Line (lLineStart, lYcount)-(lLineEnd, lYcount), RGB(0, 0, 0)
End If

picDisplay.Refresh
Next 'lYCount
End If
End If

lXPos = X
lYPos = Y
End Sub

Private Sub picDisplay_MouseUp(Button As Integer, Shift As Integer, X As Single, Y As Single)
If Button = vbLeftButton Then picDisplay.Line (X, Y)-(X + 15, Y + 15)
End Sub


Help this helps.