Call the police and be persistent. File for a restraining order. The pictures from public property or her property may be allowed, but not from your property.
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How awful to have a neighbor from hell. You should have a land surveyor mark the property lines, so there is better evidence to convict her if she trespasses again.
If a privacy fence is impractical, how about a line of tall, thick bushes or hedges?
She may be creating a civil "nuisance". You should see an attorney in person who can devise a plan of action.