Tflmicro with esp32-cam

Hi to all, I’m new to tflmicro and want to know how to use it th esp32-cam. I already train a model for object recognition using Keras and the size model with optimization is about 4MB. Converting the model to cc file I got 22MiB which is huge for this board (only has 4MB PSRAM). Maybe I’m missing other optimizations, but by looking into the examples i see object detection been size in order of KiB.
The only example I was able to use was the sine_model. Any help? A link to source for reading will be appreciated (I read the README in the examples )