Here we introduced one OV7670 camera module just purchased online, including the communication of camera module and Arduino UNO, the using ways to take photo via camera module, and so on. This is an Arduino camera module, adopted the Surveillance cameras digital image processing chip-OV0706, specially designed for image acquisition and processing application, based on TTL communication interface, very convenient to connect with Arduino controller, able to read image and data via UART serial port, and then perform some image processing. This is a detailed DIY guide for the OV7670 TTL and UART camera, and you can also download the code from ElecFreaks.
Part 1 General description
This camera module can perform image processing such as AWB (auto white balance), AE (automatic exposure) and AGC (automatic gain control), for the video signal coming from CMOS sensor. What’s more, in fusion of other advanced technology such as image enhancement processing under low illumination, and image noise intelligent forecast and suppress, this module would output high quality digital video signals by standard CCIR656 interface. OV7670 built-in JPEG decoder supported reatime encoding for collected image, and external controller can easily read the M – JPEG video streams, achieving the camera design of double stream. OV7670 supported motion detection and OSD display function of screen characters and pattern overlay, capable of self-defining detection area and sensitivity.
Part 2 Test OV7670 camera module
Step 1 Needed tool for testing
1. SD Module
2. Digital key module
3. Arduino UNO
4. Jumper wire
5. USB cable
2. Arduino IDE（download it from official website）
Step 2 Hardware connection
1. Connect the hardware as below：
2. Here below is the physical diagram：
Step 3 Software use and code programming
1. Firstly download the two files of Camera_OV0706_lib and Camera_OV0706_TEST from the Camera Module Code written by ElecFreaks and then unzip it.
2. Put the unzipped file of Camera_OV0706_lib into the Arduino IDE folder of Libraries.
3. Open unzipped file of Camera_OV0706_TEST, and the program the code into UNO. The detailed steps are demonstrated as below.
Refer to http://www.elecfreaks.com/7861.html for the full guide.