How to save the chart as image in the blob?

Hi,
I found a few topics with this problem but none solved the problem.
So, I have a chart created in the IR report and want to convert it to an image and save it in blob.
I want to print it later or it will send an e-mail
I use APEX 4.0
Thanks

Can someone help with this?

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How to save the chart as image in the blob?

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