I am afraid there is no such switch. This is the first time I hear about PhotoResize being use in similar scenario.
Photoresize by date?
For Photoresize command line.
Is it possible to resize by date? I have over 100,000 images. Scanning and skipping already exisisting files takes about an hour to complete. Is there any switch that will only search for images added on the same date the batch is run?