PixelSearch

[Dieuz]

Hi, I am looking for a way to find A specific pixel on the screen. The problem is that I cannot search for a color because this color appear multiple time on the screen. The way I am trying to make this work is to specify every color pixel around the one I am looking for. Here's the picture (x8 zoom) of the pixel I am searching for ( the red one ):

Hex Colors of every pixel around the one I am searching for:

0x525372 ------ 0xBABBCD ------ 0x707098
0x525372 ------ [0xFF0000] ------ 0xBABBCD
0x525372 ------  0x525372  ------ 0x525372

Pixel 1 ------ Pixel 2  ------ Pixel 3 
Pixel 4  ------ [THE PIXEL] ------ Pixel 5 
Pixel 6  ------  Pixel 7   ------ Pixel 8

Can anyone point me on how can I search for the coordinate(x,y) of the red pixel knowing the colors of each pixels around it.

Edited October 4, 2007 by Dieuz

[SmOke_N]

Hi, I am looking for a way to find A specific pixel on the screen. The problem is that I cannot search for a color because this color appear multiple time on the screen. The way I am trying to make this work is to specify every color pixel around the one I am looking for. Here's the picture (x8 zoom) of the pixel I am searching for ( the red one ):

Hex Colors of every pixel around the one I am searching for:

0x525372 ------ 0xBABBCD ------ 0x707098
0x525372 ------ [0xFF0000] ------ 0xBABBCD
0x525372 ------  0x525372  ------ 0x525372

Cool... Whatcha got so far?

BTW, I did make something with PixelSearch I believe that finds all the pixels of that color instead of stopping at the first one found...

http://www.autoitscript.com/forum/index.ph...st&p=266683

[Valuater]

If PixelGetColor( Pixel 1, y ) = 0x525372 And PixelGetColor( Pixel 2, y) = 0xBABBCD And ..etc

8)

EDIT: that does look like a winner RON!!!

Edited October 4, 2007 by Valuater

[Dieuz]

If PixelGetColor( Pixel 1, y ) = 0x525372 And PixelGetColor( Pixel 2, y) = 0xBABBCD And ..etc

8)

The problem is that I dont have any coordinates. The red pixel will act as a pointer. Every others actions in my script will depend of the red pixel coordinates. I cannot use PixelGetColor because I dont have any coordinates... I want to find this red pixel anywhere on the screen.

I will work on something and let you know what I got. I am a little bit affraid of the time that it could take to search all the screen...

Edited October 4, 2007 by Dieuz

[galpha]

Please check to make sure you do need all the 8 pixels around. It's possible to do, but would be very slow. Check to see if you can make it check only a fewer pixels around (like only the top 3 ones for e.g.).

If you got no other choices, then I'll write in function of it. Make sure that's what you want!

[SmOke_N]

Guys... Use the function I provided to find the Red pixel... then do a search for the 8 Pixels confirming it's what you want... It's as fast as you are going to get with native autoit.

[Paulie]

its not very fast.. and i have no way to test it... but logic says it should work.

O'course , credz go to Smoke for the _PixelSearchEx()

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#include <Array.au3>

$array = _PixelSearchEx(0, 30, 1000, 1000, 0xFF0000);Finds all red
Dim $Results[1][2],$count = 0
For $i  = 1 to Ubound($array,1)-1
    If PixelGetColor($array[$i][0]-1,$array[$i][0]-1) = 0x525372 and _
        PixelGetColor($array[$i][0]-1,$array[$i][0]) = 0x525372 and _
        PixelGetColor($array[$i][0]-1,$array[$i][0]+1) = 0x525372 and _
        PixelGetColor($array[$i][0],$array[$i][0]-1) = 0xBABBCD and _
        PixelGetColor($array[$i][0],$array[$i][0]+1) = 0x525375 and _
        PixelGetColor($array[$i][0]+1,$array[$i][0]-1) = 0x707098 and _
        PixelGetColor($array[$i][0]+1,$array[$i][0]) = 0xBABBCD and _
        PixelGetColor($array[$i][0]+1,$array[$i][0]+1) = 0x525372 Then 
        $Count+=1
        ReDim $Results[$Count][2]
        $Results[$Count][0] = $array[$i][0]
        $Results[$Count][1] = $array[$i][1]
    EndIf
Next
        
_ArrayDisplay($Results)
        
Func _PixelSearchEx($xTop, $yTop, $xBottom, $yBottom, $nColor, $iShade = 0, $iStep = 1)
    Local $aPix, $aCoords, $nYAdd, $iAdd
    For $xCC = $xTop To $xBottom
        $nYAdd = 0
        While $nYAdd <= $yBottom
            $aPix = PixelSearch($xCC, $yTop + $nYAdd, $xCC, $yBottom, $nColor, $iShade, $iStep)
            If Not IsArray($aPix) Then ExitLoop
            If Not IsArray($aCoords) Then Local $aCoords[1][2]
            $nYAdd += ($aPix[1] - $yTop) + 1
            $iAdd += 1
            ReDim $aCoords[$iAdd + 1][2]
            $aCoords[$iAdd][0] = $aPix[0]
            $aCoords[$iAdd][1] = $aPix[1]
        WEnd
    Next
    If IsArray($aCoords) Then Return $aCoords
    Return SetError(1, 0, 0)
EndFunc

Edited October 4, 2007 by Paulie

[galpha]

Guys... Use the function I provided to find the Red pixel... then do a search for the 8 Pixels confirming it's what you want... It's as fast as you are going to get with native autoit.

Yea use this function, except it would be built like this:

Pixel 1 ------ Pixel 2 ------ Pixel 3

Pixel 4 ------ [THE PIXEL] ------ Pixel 5

Pixel 6 ------ Pixel 7 ------ Pixel 8

Pixel 1-4-6-7-8 = $array1 (since they all have the same color: dark grey)

Pixel 2-5 = $array2 (same color: light grey)

Pixel 3 = $array3

THE PIXEL = $array4 (red dot)

EDIT:: Looks like Paulie wrote a simplier way, should have tought about it

Edited October 4, 2007 by galpha

[Airwolf]

You could try using checksums...

http://www.autoitscript.com/forum/index.ph...mp;#entry363111

[Dieuz]

Thanks Paulie! Here's an actual picture to test it... Let's see if it works.

EDIT: Doesnt work for me, let me know if it works for you?

Error Here

PixelGetColor($array[$i][0],$array[$i][0]+1) = 0x525375 and _

Change 0x525375 to 0x525372

Doesnt seem to correct the problem...

Edited October 4, 2007 by Dieuz

[Paulie]

That image is too big... the red spot int the center is about 7x7 pixels... at least on my resolution (2560x1024)

NVM you edited the image... testing...

Edited October 4, 2007 by Paulie

[SmOke_N]

If you follow this whole thread, and look at the code that I'm giving you the link too... you'd probably find this to be the making of a solution... and much faster: http://www.autoitscript.com/forum/index.ph...st&p=300569

So you could tear apart that code to do a PixelSearch like it is doing, then once the color is found to do a PixelCheckSum of the area needed if matched then you found your coords.

Edited October 4, 2007 by SmOke_N

[Dieuz]

I will need to get the value of the checksum before entering it into my script, right? so I could compare the same value every time.

EDIT: Just thought of something, could it compare a certain region (around the pixel) with an image(.gif) then try to find the one that fit exactly.

Edited October 5, 2007 by Dieuz

[Dieuz]

This seem to work for me:

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#include <Array.au3>

Global $x, $y

$Found = 0

sleep(5000)

$array = _PixelSearchEx(0, 0, 1000, 1000, 0xFF00000);Finds all red


For $i  = 1 to Ubound($array,1)-1
    If PixelGetColor($array[$i][0]-1,$array[$i][1]-1) = 0x525372 and _
        PixelGetColor($array[$i][0]-1,$array[$i][1]) = 0x525372 and _
        PixelGetColor($array[$i][0]-1,$array[$i][1]+1) = 0x525372 and _
        PixelGetColor($array[$i][0],$array[$i][1]-1) = 0xBABBCD and _
        PixelGetColor($array[$i][0],$array[$i][1]+1) = 0x525372 and _
        PixelGetColor($array[$i][0]+1,$array[$i][1]-1) = 0x707098 and _
        PixelGetColor($array[$i][0]+1,$array[$i][1]) = 0xBABBCD and _
        PixelGetColor($array[$i][0]+1,$array[$i][1]+1) = 0x525372 Then 
        MsgBox(0,"","found!" & @CRLF & $array[$i][0] & ", " & $array[$i][1])
        $Found = 1
    Else
    EndIf
Next

If $Found = 1 Then
Else
MsgBox(0,"Crap", "Pixel not found")
EndIF
        
Func _PixelSearchEx($xTop, $yTop, $xBottom, $yBottom, $nColor, $iShade = 0, $iStep = 1)
    Local $aPix, $aCoords, $nYAdd, $iAdd
    For $xCC = $xTop To $xBottom
        $nYAdd = 0
        While $nYAdd <= $yBottom
            $aPix = PixelSearch($xCC, $yTop + $nYAdd, $xCC, $yBottom, $nColor, $iShade, $iStep)
            If Not IsArray($aPix) Then ExitLoop
            If Not IsArray($aCoords) Then Local $aCoords[1][2]
            $nYAdd += ($aPix[1] - $yTop) + 1
            $iAdd += 1
            ReDim $aCoords[$iAdd + 1][2]
            $aCoords[$iAdd][0] = $aPix[0]
            $aCoords[$iAdd][1] = $aPix[1]
        WEnd
    Next
    If IsArray($aCoords) Then Return $aCoords
    Return SetError(1, 0, 0)
EndFunc

Thx to Paulie for the help!

Can anyone test it too with this picture:

Paulie: I had to replace $array[$i][0] by $array[$i][1] for the y coordinate.

Edited October 5, 2007 by Dieuz

[Matrix112]

maybe this is a good idea. generating a checksum with a line of pixels

it´s not ready now, just a though about it

this should find a section out of many pixels i hope

$test = _PixelChecksumFindLine ("3120470613");<--- checksum out of a ine of some pixels
If $test = -1 Then
    MsgBox(0, "Test", "was found")
Else
    MsgBox(0, "Test", "not found " & $test)
EndIf
Exit



Func _PixelChecksumFindLine($chksm)  
    $x = @DesktopWidth
    $y = @DesktopHeight
    For $a = 1 To $y
        $sum = PixelChecksum(0,$a,$x,$a)
        If $sum = $chksm Then
            Return $a
            ExitLoop
        EndIf
    Next
Return -1   
EndFunc