Pixel search autoit

Pixel search autoit DEFAULT

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It can be hard to know where exactly a button is located on the screen, this is where PixelSearch comes in. The PixelSearch function of AutoIt allows to search a region of the screen for a given pixel color, you can then decide what to do if the color was found, which would often be clicking the coordinates where the color is found.

When multiple elements with the same color exists, its useful to only check the region where you know the unique color should show up. To check for a image, you will need to use other functions, these will be covered in a later Tutorial.

Performing a simple color search

The PixelSearch function works by feeding it with a color to check for, and a region to be checked. Its also possible to add a variation of the color, from 0-255, which is just a variation of the Red, Green, and Blue values.

Pixel searches are effected by the size of the area that you want to check, smaller areas are faster to scan than larger ones.

When the search is completed, we check @error to see if a color was found, nothing was found if it equals 1.

The below will check the region 0,0 (Start) - 100,200 (end) of the screen, the values are given from the LeftTop of the screen.

$coord=PixelSearch(0,0,100,200,0xFF0000)[email protected](0,"X and Y are:",$coord[0]&","&$coord[1])EndIf

A two element array is returned if a color was found, containing the coordinates of the pixel it found. The search stops after finding a pixel matching the specified parameters.

Clicking the returned coordinates

Clicking the coordinates returned by the PixelSearch function, is fairly easy once a color is found.

$coord=PixelSearch(0,0,100,200,0xFF0000)[email protected]("primary",$coord[0],$coord[1],1,0)EndIf

Looping the Pixel Search

You will often need to loop the pixel search, this is usually done when you want the program to wait for an element to appear on the screen.

Note. It might help save CPU to make your script Sleep a few milliseconds inside the loop.

$i=0While$i<=10$coord=PixelSearch(0,0,100,200,0xFF0000)[email protected]("primary",$coord[0],$coord[1],1,0)EndIf; Uncomment the below line to make the script click only 10 times, or until the hotkey is pressed.; $i = $i + 1; Uncomment the below line to make the script pause between clicks, the value is in milliseconds; Sleep(5000)WEnd
Sours: https://beamtic.com/autoit-pixelsearch-tutorial

Function Reference


Searches a rectangle of pixels for the pixel color provided.

PixelSearch ( left, top, right, bottom, color [, shade-variation = 0 [, step = 1 [, hwnd]]] )

Parameters

leftleft coordinate of rectangle.
toptop coordinate of rectangle.
rightright coordinate of rectangle.
bottombottom coordinate of rectangle.
colorColor value of pixel to find (in decimal or hex).
shade-variation[optional] A number between 0 and 255 to indicate the allowed number of shades of variation of the red, green, and blue components of the color. Default is 0 (exact match).
step[optional] Instead of searching each pixel use a value larger than 1 to skip pixels (for speed). E.g. A value of 2 will only check every other pixel. Default is 1. It is not recommended to use a step value greater than 1.
hwnd[optional] Window handle to be used. Default is the desktop window.

Return Value

Success:a two-element array of pixel's coordinates. (Array[0] = x, Array[1] = y).
Failure:sets the @error flag to 1 if the color is not found.

Remarks

The search direction varies as follows:
    Left-to-Right - left < right
    Right-to-Left - right < left
    Top-to-Bottom - top < bottom
    Bottom-to-Top - bottom < top
Changing the search direction can be a useful optimization if the color being searched for frequently appears in a specific quadrant of the search area since less searching is done if the search starts in the most common quadrant.

Remember, a typical display at 1024 x 768 has 786432 pixels. Although PixelSearch() is optimized, narrowing the search area helps speed up the result.

Related

PixelChecksum, PixelCoordMode (Option), PixelGetColor

Example

#include<MsgBoxConstants.au3>; Find a pure red pixel in the range 0,0-20,300Local$aCoord=PixelSearch(0,0,20,300,0xFF0000)[email protected]    MsgBox($MB_SYSTEMMODAL,"","X and Y are: "&$aCoord[0]&","&$aCoord[1])EndIf; Find a pure red pixel or a red pixel within 10 shades variations of pure red$aCoord=PixelSearch(0,0,20,300,0xFF0000,10)[email protected]    MsgBox($MB_SYSTEMMODAL,"","X and Y are: "&$aCoord[0]&","&$aCoord[1])EndIf
Sours: https://www.autoitscript.com/autoit3/docs/functions/PixelSearch.htm
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Link to this—do it now!

The AutoIt PixelSearch Function is used to search a region of the screen for a pixel with a given color value, or a variation thereof.

PixelSearch either returns a two element array containing the coordinates of the pixel, or sets @error to 1 if color is not found.

PixelSearch is generally pretty fast, but if you think its to slow, narrowing the search area may help increase the performance.

Possible Values

pixelsLeft coordinate of rectangle.
pixelsTop coordinate of rectangle.
pixelsRight coordinate of rectangle.
pixelsBottom coordinate of rectangle.
colorColour value of pixel to find (in decimal or hex).
shade-variation [optional]A value between 0-255. This parameter allows to search for variations of the color provided. If provided, the number will search for a variation within both the Red, Geen, and Blue values of the color.
step [optional]A value larger then 1 will skip pixels, instead of searching each pixel. Effects the speed of the search.
hwnd [optional]Window handle.

PixelSearch Examples

Looks for a pure Red Pixel, in the region 0,0 (Start) - 100,200 (end).

$coord = PixelSearch(0, 0, 100, 200, 0xFF0000) If Not @error Then MsgBox(0, "X and Y are:", $coord[0] & "," & $coord[1]) EndIf

If you want to search for variations, then simply add the next parameter.

$coord = PixelSearch(0, 0, 100, 200, 0xFF0000, 5) If Not @error Then MsgBox(0, "X and Y are:", $coord[0] & "," & $coord[1]) EndIf

To click the returned coordinates, use something like the below.

$coord = PixelSearch(0, 0, 100, 200, 0xFF0000, 5) If Not @error Then MouseClick("primary", $coord[0], $coord[1], 1, 0) EndIf

If you want to click somewhere near where the color was found, say above or below, than simply add the offset to the coordinates. Just be careful that you don't attempt to click outside the screen. The below will click 15 pixels above the located color:

$coord = PixelSearch(0, 15, 100, 200, 0xFF0000) If Not @error Then MouseClick("primary", $coord[0], $coord[1]-15, 1) EndIf

Links

  1. PixelSearch - autoitscript.com
Sours: https://beamtic.com/autoit-pixelsearch

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