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google.appengine.api.images.histogram_async
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Calculates the histogram of the given image - async version.

google.appengine.api.images.histogram_async(
    image_data, rpc=None
)

Args
`image_data`	String of the source image data.
`rpc`	An optional UserRPC object.

Returns
An UserRPC object.

Raises
`NotImageError`	If the supplied image data is not an image.
`BadImageError`	If the supplied image data is corrupt.
`LargeImageError`	If the supplied image data is too large to process.
`Error`	All other errors.

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Last updated 2022-09-30 UTC.

Args