Cats have their own methods for recognizing their owners. They're not completely unrecognizable; they can distinguish between their "owner" and "other people" through unique ways. After reading this, you'll realize how incredibly smart cats are!
Ⅰ. By the owner's voice
Cats have very sensitive hearing; they can hear a much wider range of Hertz than humans.
Cats can distinguish their owners from other people by their tone of voice and manner of speaking. Studies have shown that cats can differentiate their owners from other people by their tone of voice and manner of speaking, as they are very familiar with their owners' tone of voice, intonation, and speaking speed.

So cats can tell whether you're praising them or scolding them. When they hear their owner's voice, cats react more intensely and their brains become more active.
II. By observing the owner's walking speed
Besides sound, cats can also recognize their owners by the speed and rhythm of their walk. After all, cats have a pretty strong sense of perception.
The sound of their owner's footsteps is very familiar to cats; they can accurately distinguish their owner's footsteps from those of other people.
When you get home from get off work every day, you'll find your cat waiting at the door. You can see your cat as soon as you open the door because your cat heard your footsteps.
III. By the owner's scent
Cats have a very sensitive nose and an excellent sense of smell; they can remember the scent of their owners.
Cats can accurately distinguish their owner's body odor and fragrance. This recognition method is an innate instinct in cats and one of the important means by which they differentiate between "owner" and "other people".
When a cat rubs against you, it's because it wants to leave its scent on you so it knows you're its owner. It can smell the cat's scent on you.
IV. Identifying the owner by appearance
Although cats are nearsighted and colorblind, they can still recognize their owners by their appearance.
Although they cannot clearly see their owner's facial features, cats can recognize their owners by their body shape, hairstyle, and other characteristics.

While this method of identification isn't the primary means, it provides important reference information for cats to distinguish between "owners" and "others." Furthermore, through prolonged interaction with their owners, cats can remember their body language and form memories of them.
Cats distinguish their owners from other people by combining multiple methods.
To help your cat quickly remember you as its owner, you can do these two things:
(1) Pet owners should interact and play with their cats more often to enhance their bond. Using treats as an aid will make the effect even better. This can increase the cat's enthusiasm for playing.
(2) Feed your cat more often. The cat will know that you are its provider and will regard the person who feeds it as its owner. If your cat pesters you for food every day, it means you have succeeded. Cats are carnivores and have high protein requirements. It is best for pet owners to choose a cat food with a high meat content as the main food to meet the cat's basic nutritional needs.