Abstract: A system for universal serial bus (USB) image capturing with two isochronous transfers includes a USB image capturing device and a host. The USB image capturing device has two endpoints for transferring a video stream through a USB. The host has a driver for receiving the video stream through the USB. The driver receives the video stream, and creates a read extension data structure for the endpoints. The driver manages and dispatches the packets of the endpoints, and copies data of the packets into a first buffer and a second buffer, respectively. When a first end frame flag in a packet of the first endpoint is set and a second end frame flag in a packet of the second endpoint is set, the driver combines data of the first and the second buffers into a frame and sends the frame to the host.

Abstract: A system for universal serial bus (USB) image capturing with two isochronous transfers includes a USB image capturing device and a host. The USB image capturing device has two endpoints for transferring a video stream through a USB. The host has a driver for receiving the video stream through the USB. The driver receives the video stream, and creates a read extension data structure for the endpoints. The driver manages and dispatches the packets of the endpoints, and copies data of the packets into a first buffer and a second buffer, respectively. When a first end frame flag in a packet of the first endpoint is set and a second end frame flag in a packet of the second endpoint is set, the driver combines data of the first and the second buffers into a frame and sends the frame to the host.

Abstract: A method and system for performing image processing in a computer apparatus. The system has an image driver unit to receive a video stream output by an image capture device and perform a pre-processing on the video stream to thereby obtain a color video stream, and an image processing module to use an application programming interface (API) to notify the image driver unit of outputting the color video stream in order to perform a special effect processing on the color video stream to thereby produce a processed video stream. The image processing module uses another API to notify the image driver unit and send the processed video stream to the image driver unit. The image driver unit performs a post-processing on the processed video stream. Accordingly, the image processing module can use the resources of a user mode to perform the complicated image processing operations.