I'm trying to create hotspots on an image using JavaScript by drawing shapes like polygons, rectangles, and circles. I would like to achieve something similar to the examples provided in the links below. Also, I am curious about how to overlay a canvas on top of an image.
For example: http://www.maschek.hu/imagemap/imgmap
I have successfully implemented a similar feature on http://jsfiddle.net/xyz123/7
The concept involves creating a transparent canvas that overlaps the original image in both position and dimensions. In my specific case, I transferred the image onto the canvas to accurately extract the desired section of the picture, but this step could be skipped if not needed.
Using the overlay canvas allows for drawing with semi-transparency, enabling the underlying image to remain visible through the drawn elements.
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