PCB: Although it costs more, a 4-layer PCB is used for all cameras for better signal integrity and EMI issues. Additionally, using 4-layers made it possible to fit everything on the 1.0×1.3 inches OpenMV1 board.Image Sensor: OpenMV1 supports many single package lens/sensors, such as the OV965x and OV2640 while OpenMV2 and OpenMV3 support a single sensor with an external lens.The low-cost, the HW camera interface and the FPU and DSP made this particular controller a perfect match for the project. Features a single precision FPU, DSP instructions and a DCMI (Digital Camera Interface). Processor: Based on STM32F ARM Cortex-M Digital Signal Controllers (DSCs) running at 168-216MHz.Misc functions: kmeans, filters, scaling, sub-image, blitting and alpha blending.Template matching with Normalized Cross Correlation (NCC).QR and Bar codes decoding and AprilTags support.ORB keypoints detector, descriptor, matching and tracking.Face detection with VJ (compatible with OpenCV’s cascades).16MB SDRAM on-board enables uClinux to run on OpenMV2.User-friendly Python IDE to view the framebuffer and upload scripts to the camera.Extension Header breaks out UART, I2C, SPI, PWM, DAC and ADC.Recording and Streaming GIF and MJPEG to SD or external WiFi shield.RGB, YUV and JPEG Omnivision sensors (OV2640 and OV7725).On board uSD Card or internal Flash storage for scripts, images and video.
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