c# multi - point selection on an image

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I'm designing interface with visual c# for my image processing project. I need point selection on an image and classification these points for using in my image processing code at vhdl.

Original image will stay at a picturebox and I will use selected image in another picturebox.

How I can select points on an image?

Posted 12-Apr-12 3:20am

s_n_m_

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MarqW · Accepted Answer · 2012-04-12T03:50:00

Solution 1

I'm assuming you want to select points in the UI from the picturebox. In which case, you can use the MouseDown event, check e.Buttons == MouseButtons.Left, and use e.Location (or e.Position, can't remember the property name) for your images X/Y for where the user clicks, and you can add this to an array/list.

You can also use the picturebox Paint event to redraw previously clicked points from your array/list to show the user some visual feedback.

Posted 12-Apr-12 3:50am

MarqW

Comments

s_n_m_ 12-Apr-12 10:16am

thank you. Yes I will select in the UI and use MouseDown event. And in addition to this, I will select twenty points and put a red point to each one of them while I select. How can I do it?

MarqW 12-Apr-12 10:19am

I answered your additional question in my first post - You need to handle the Paint event of the PictureBox, then using e.Graphics draw rectangles (or circles etc.) at your stored 20 points

s_n_m_ 12-Apr-12 10:26am

Thank you again. I understand now.

MarqW 12-Apr-12 10:27am

No problems