MultiCam Boards Documentation > GRABLINK series Documentation > GRABLINK Expert 2 Handbook > Image Processing > Frame Grabber Operation > Acquisition Modes

Acquisition Modes

Area-Scan Acquisition Modes

With area-scan cameras, This board supports the following MultiCam acquisition modes:

Snapshot

In the Snapshot mode, the frame grabber repeatedly acquires individual frames. Each frame is a still picture of the observed scene at a given instant.

The Snapshot mode is intended for asynchronously reset cameras, with external trigger. It is the most relevant mode for machine vision applications.

High Frame Rate

In the High Frame Rate —HFR— mode, the frame grabber repeatedly acquires individual frames from very fast cameras. Each frame is a still picture of the observed scene at a given instant. But, it may appear that the frame duration is too short to allow software interaction each time a frame is acquired. In the HFR mode, a number of frames are grouped in a single data set and are delivered to the host memory.

The HFR mode is intended for very fast asynchronously reset cameras, with external trigger.

Refer to the MultiCam Acquisition Principles application note for additional information about acquisition modes.

Line-Scan Acquisition Modes

With line-scan cameras, This board supports the following MultiCam acquisition modes:

Page

In the Page mode, the frame grabber repeatedly acquires a set of contiguous lines. This set of line is conventionally called a page. Each page represents a discrete object moving in front of the line-scan camera.

In the Page mode, an external trigger signaling the object arrival is supported.

Web

In the Web mode, the frame grabber capture an image of infinite length of material moving in front of the line-scan camera. The image is divided in successive sets of lines called pages. The pages are a practical division of data in separate buffers for the easier software processing. Thus, there is no gap between the pages.

Long Page

The Long Page mode is an extension of the Page mode used when the size of the objects is very large. In these cases, a single object cannot be practically contained in a single data buffer. Several pages are needed to record one single object.

This mode is also especially useful when the length of the captured object is not known in advance.

Refer to the MultiCam Acquisition Principles application note for additional information about acquisition modes.

MultiCam Parameters