RandomImage

RandomImage[max] gives an image with pseudorandom pixel values in the range 0 to max.

RandomImage[{min,max}] generates pseudorandom pixel values in the range min to max.

RandomImage[dist] generates pixel values using a symbolic distribution dist.

RandomImage[…,size] generates a random image of the specified size.

RandomImage[…,size,"type"] gives an image converted to the specified type.

Please visit the official Wolfram Language Reference for more details and examples on core symbols.