pub fn text_detection(image_base64: String) -> Result<String, String>
Expand description

Detect text for the given image.

image_base64 is the base64 encoded image content.

Return the detected text.


Take a picture from Internet, such as “”. If we pass the base64 encoded content of this image, then the result should be: Ok(“Coca-Cola DISNEY Google\nFedEx ebay Kleenex”) If the content can’t be recognized as an image by Cloud Vision, then the result would be something like: Err(“Error: 13 INTERNAL: Request message serialization failure: invalid encoding”)