BACKGROUND

1. Field of the Disclosure

This disclosure generally relates to a photographing system and, more particularly, to a smart photographing system that utilizes a photographing device having two output interfaces to output different image frames respectively to a processor and a back end to perform the image feature recognition and tagging as well as the image recording.

2. Description of the Related Art

Referring toFIG.1, it is a block diagram of a conventional video system including an image sensor11and a back end circuit13. The image sensor11is used to monitor an environmental change and output a video compatible with the Full HD or higher resolution format to the back end circuit13. The back end circuit13records the video and then performs the image analysis to tag image features in the recorded video.

Generally, the back end circuit13has higher power consumption. Nowadays, the power saving is an important issue such that the total power consumption of a system should be reduced as much as possible.

Accordingly, the present disclosure provides a smart photographing system that reduces the total power consumption by reducing data amount processed by a back end circuit thereof.

SUMMARY

The present disclosure provides a smart photographing system that adopts a photographing device having two output interfaces to respectively output image frames of different resolutions to different receiving ends to finish the feature tagging before the image recording.

The present disclosure provides a photographing device including an image sensor, a first output interface, a second output interface and a processor. The image sensor is configured to capture a series of image data. The first output interface is coupled to the image sensor, and configured to output a first image frame, which corresponds to a first part of the series of image data and has a first size. The second output interface is coupled to the image sensor, and configured to output a second image frame, which corresponds to a second part of the series of image data and has a second size, to downstream of the photographing device. The processor is configured to receive the first image frame, control the image sensor to output the second image frame via the second output interface when identifying the first image frame containing a predetermined feature, and control the second output interface to continuously output successive second image frames within a predetermined interval.

The present disclosure further provides a photographing device including an image sensor, a first output interface, a second output interface and a processor. The image sensor is configured to capture a series of image data. The first output interface is coupled to the image sensor, and configured to output a first image frame, which corresponds to a first part of the series of image data and has a first size. The second output interface is coupled to the image sensor, and configured to output a second image frame, which corresponds to a second part of the series of image data and has a second size, to downstream of the photographing device. The processor is configured to receive the first image frame, and control the image sensor to output the second image frame via the second output interface when identifying the first image frame containing a predetermined feature, wherein before the processor identifies the first image frame containing the predetermined feature, the second output interface is configured not to output any second image frame.

The present disclosure further provides a photographing device including an image sensor, a first output interface and a second output interface. The image sensor is configured to capture image data of multiple pixels. The first output interface is coupled to the image sensor, and configured to output a part of the captured image data for image recognition. The second output interface is coupled to the image sensor, and configured to output the captured image data to downstream of the photographing device, wherein the first output interface and the second output interface are not configured to output corresponding image data simultaneously.

The feature tag of the present disclosure is referred to any tags instead of a time tag such as the moving object tag, ID tag, face tag, skin color tag, human shape tag, vehicle tag, license plate tag and so on. The tag is additional information added to pixel data of the second image frame.

