Hi,
Do you think it is possible to use an Arduino to control a camera and a LED stripe at once? I plan to turn on the LED light while the camera is capturing the image.
An ESP32CAM could do the thing.
Is that coupled with the camera?
I ask because I want to put the lead under a leaf to capture the transmissive light.
Try using the words "esp32 cam" in a search thingy for more info.
Unless you are using programmable LEDs like NeoPixels, an entire strip can be controlled from an I/O pin, and any Arduino can do that, with or without multitasking.
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At least, that will block the X rays. 
So, Can I easily combine the LED flash with the camera? I can use an ESP32CAM and its flash to get light from the above and combine an entire stripe of LED in multitasking.
Yes, unless there is more you're not telling us. You would need a driver circuit to interface the LED strip with the Arduino. Now is a good time to research the difference between programmable and non-programmable LED strips.
If you have existing software that operates an existing flash, probably you are going to have to dig into that code if you want another flash to work together with the existing flash.
That is a question I cannot answer without knowledge of your skill level. I can say that I would not have issue with making an LED strip illuminate by an ESP32CAM at picture taking time. The ESP32 CAM would have enough pins, available processing power, and with an external power supply be able to run a LED strip.
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