Where to change the frame rate of the project tflmicro:person detection

I am using the pico4ML board to capture images for my application. I use the code of “tflmicro: person detection” as the base for modification. the camera is HM01b0. however, the updating frame rate is nearly to 1sec. can some one tell me how to change it. I need to change the frame as fast as possible. your help is very appreciated. thanks