how to convert a single grayscale image into the color in a data tore i have mixed color of images in the datastore both black and white and color how?

importing the alexnet framework

net = alexnet
ly = net.Layers
inlayer = ly(1)
insz = inlayer.InputSize

creating the out layer

outlayer=ly(end)

creating the data store......

store = imageDatastore("images/",'FileExtensions',{'.jpg','.jpeg'})

Extracting the files.........

fnames = store.Files

REad an image

img = readimage(store,7)

augmented image data store

auds = augmentedImageDatastore([227 227],store)

classifying the images..

preds = classify(net,auds)

Display images in store what you are imported

montage(store)

converting the gray scale images to the color 3d images

auds = augmentedImageDatastore([227 227],store,'ColorPreprocessning','gray2rgb')

[Shuichi Obuchi]

There is Spelling Mistake.

ColorPreprocessing instead of ColorPreprocessning