Hi @Arunkumar ,
Thanks for posting query in Microsoft Q&A Platform.
You need to consider writing your code logic of reading image from azure blob storage and convert that image to byte in Azure Function. And then Azure function can be called as part of your ADF pipeline using Azure Function activity.
Azure Function activity followed by web activity we can use to make API call.
Please note, you can directly do API call also from azure function code itself.
Hope this helps. Please let us know how it goes. Thank you.