ESP32 Cam driver for Edge detection and Image Processing

General Information

This fork of the ESP32 Camera driver is intended to be used for edge detection and image processing at specified resolution in JPEG.

Supported Soc

• ESP32

Supported (tested) Sensor

model	max resolution	color type	output format	Len Size
OV2640	1600 x 1200	color	YUV(422/420)/YCbCr422 RGB565/555 8-bit compressed data 8/10-bit Raw RGB data	1/4"

Important to Remember

• Except when using CIF or lower resolution with JPEG, the driver requires PSRAM to be installed and activated.
• Using YUV or RGB puts a lot of strain on the chip because writing to PSRAM is not particularly fast. The result is that image data might be missing. This is particularly true if WiFi is enabled. If you need RGB data, it is recommended that JPEG is captured and then turned into RGB using fmt2rgb888 or fmt2bmp/frame2bmp.
• When 1 frame buffer is used, the driver will wait for the current frame to finish (VSYNC) and start I2S DMA. After the frame is acquired, I2S will be stopped and the frame buffer returned to the application. This approach gives more control over the system, but results in longer time to get the frame.
• When 2 or more frame bufers are used, I2S is running in continuous mode and each frame is pushed to a queue that the application can access. This approach puts more strain on the CPU/Memory, but allows for double the frame rate. Please use only with JPEG.

Installation Instructions

Using with ESP-IDF

• Add as a submodule

  git submodule add link-to-this-repo components/esp32-cam-driver

• Enable PSRAM in menuconfig (also set Flash and PSRAM frequiencies to 80MHz)
• Include esp_camera.h in your code

Enable PSRAM on menuconfig or type it direclty on sdkconfig. Check the official doc for more info.

CONFIG_ESP32_SPIRAM_SUPPORT=y