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pixel searching

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I have the following image

Posted Image

and would like to be able to find the extreme corner pixels via some sort of pixel search function.

these are the points I am looking for.

Posted Image

anyone know how I would go about it?

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I would check the image pixels one horizontal line at a time from left to right, starting with the top line. I would then compare sequential lline records to measure by how many positions the first and last dark pixels vary from line to line. I would then set a triggering variation size to record the points. That should give you the spots you marked. Does that make any sense?

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nice pic of an handheld emulator. Am I correct? Looks like a blackberry.

Ah ha! no

Its actually a stack of poker chips. I was trying to write an app that would count the chips just from the picture. The idea was to turn the image into a shilloute, by using the background colour with a wide range (to produce the pic you see above).

Then use the known geometry of the chips to work out how many are there. Once we have the extreme width in pixels, we cant work out what the depth of a chip is in pixels, working out the peak point (the high point on the image) we can then work out chip angle, and then count the chips.

Unfortunately I never got it off the ground, I could never program it to see the corners. :-(

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I do hope these chips were not part of some form of poker game - you have read our Forum Rules I trust? ;)


Any of my own code posted anywhere on the forum is available for use by others without any restriction of any kind._______My UDFs:


ArrayMultiColSort ---- Sort arrays on multiple columns
ChooseFileFolder ---- Single and multiple selections from specified path treeview listing
Date_Time_Convert -- Easily convert date/time formats, including the language used
ExtMsgBox --------- A highly customisable replacement for MsgBox
GUIExtender -------- Extend and retract multiple sections within a GUI
GUIFrame ---------- Subdivide GUIs into many adjustable frames
GUIListViewEx ------- Insert, delete, move, drag, sort, edit and colour ListView items
GUITreeViewEx ------ Check/clear parent and child checkboxes in a TreeView
Marquee ----------- Scrolling tickertape GUIs
NoFocusLines ------- Remove the dotted focus lines from buttons, sliders, radios and checkboxes
Notify ------------- Small notifications on the edge of the display
Scrollbars ----------Automatically sized scrollbars with a single command
StringSize ---------- Automatically size controls to fit text
Toast -------------- Small GUIs which pop out of the notification area


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