Noise reduction circuit for image sensor

Some examples described herein include a noise reduction circuit for an image sensor. The noise reduction circuit may include a reference frame generator configured to generate a reference frame based on a set of image frames received from an image sensor during a calibration phase. The noise reduction circuit may also include a memory coupled to the reference frame generator. The memory may receive a reference frame from a reference frame generator and store the reference frame for subsequent use during a noise reduction phase. The noise reduction circuit may also include a processor coupled to the memory. The processor may retrieve a reference frame from the memory during the noise reduction phase and use the reference frame to reduce noise in an image frame received from the image sensor. 本文描述的一些示例包括用于图像传感器的降噪电路。该降噪电路可以包括参考帧生成器，该参考帧生成器被配置为在校准阶段期间基于接收的来自图像传感器的一组图像帧来生成参考帧。该降噪电路还可以包括耦接到参考帧生成器的存储器。该存储器可以从参考帧生成器接收参考帧，并存储该参考帧以供随后在降噪阶段期间使用。降噪电路还可以包括耦接到存储器的处理器。该处理器可以在降噪阶段期间从存储器中检索参考帧并使用该参考帧来降低接收的来自图像传感器的图像帧中的噪声。