Products

SLA-LIB

SLA-LIB

Product Guide

Software Features

Stabilization

SLA digital stabilization technology dramatically improves video quality with robust frame to frame registration and optional video de-interlacing. Video de-interlacing eliminates motion artifacts. Digital stabilization augments mechanical gyro-stabilization. Stabilized scenes reduce operator fatigue and workload, while making it a snap to choose a target.

Object Tracking

Hands-free, low-latency tracking feedback accurately drives cameras to follow fast-moving vehicles, including at high zoom. High-value targets such as vehicles or people can be tracked for minutes at a time, even when the target is temporarily obscured – for example when a vehicle travels under an overpass or behind trees – or when video saturation occurs. If the target is temporarily obscured (partially or completely) or if the camera is momentarily “bumped” off the target, target lock can be re-established when the target becomes visible. Object tracking has a “zoom to track” mode which keeps the targeted object centered in the screen for easy viewing.

Image Enhancement

Image enhancement helps discern imagery by bringing out difficult-to-see details in the source video, while simultaneously suppressing video noise. Video enhancement applications include imaging in low-light, resolving objects hidden by fog or shadows, and de-noising of EO and IR video.

Digital De-Interlacing

Many standard video cameras are interlaced, which means that a single frame of video is actually exposed as two separate fields at different times (for NTSC cameras, one field is exposed every 16.7 milliseconds). Data from the two fields are “interlaced” with one another by taking alternating rows from the two fields: the top row of the video frame is taken from the top row of field 1, the second row from the top row of field 2, and so on. If the camera is moving or shaking, the fields may be of different parts of the scene and the resulting frame will appear doubled, blurry, or jittery. De-interlacing ameliorates this issue by replacing the odd rows of each frame with an estimate of their true content.

Digial Zoom

Digital zoom renders the camera input frame scaled up by a factor of 1.0 to 255/64. The use of SightLine Applications' digital zoom feature offers robustness advantages to achieving the same field of view using the digital zoom feature built into many cameras. When using a digital zoom feature built into a camera, a cropped frame is produced by the camera resulting in a reduced angular field of view to use for tracking. This reduced field of view makes the overall system more susceptible to disturbances. However, when using SightLine Applications' digital zoom, the entire camera frame is delivered to the processing board, and the larger field of view is used for frame-to-frame registration and target tracking with no increase in susceptibility. Digital zoom is a post-processing operation that occurs after registration and tracking. This opens up the use of the Zoom to Track mode. In this mode, digital zoom is applied to each frame centered on the position of the tracked target, rather than on the center of the frame. This mode provides a perfectly centered view of the tracked target and has the side effect of reducing the impact of the borders created by video stabilization.

Multiple Target Tracking

SightLine Applications' object tracking utilizes template-based tracking in which the operator designates up to five targets. From that point on, automatic tracking will determine the location of each target in each frame, along with a confidence measure.

Moving Target Detection

Moving Object Detection identifies all moving objects relative to the scene. The selected target will be designated by a green box and the secondary targets by yellow boxes. The primary target is designated by a double red box and is easily tracked by a PTZ turret. The selected target can be changed by tabbing through the available targets. One click on the selected target can stop the tracking of that target, or designate it as a primary target for the turret to follow.

Picture-In-Picture, Side-by-Side, Quad Screen

Several display modes are available on the SLA-2000. In addition to a single picture display, Picture-In-Picture, Side-by-Side and Quad Screen modes are available. These can be visualized as follows:

Panoramic Stitching

Panoramic stitching takes the inputs from up to four slightly overlapping cameras and matches features to create a wide view over the range of the cameras. It effectively “stitches” the image streams together to create a panoramic view.

Image Fusion

Fusion allow user-selectable blending of image information from two cameras. In addition to selecting the type of algorithm used to control video mixing, one video may be translated, rotated, and delayed relative to the other to compensate for misalignments and latency differences between sensors.

MPEG2-TS (H.264 + KLV)

MPEG2 Transport Stream is a standard format for transmission and storage of video. H.264 video compression is available on the SLA-2000 class products. H.264 is currently one of the most commonly used formats for the recording, compression, and distribution of high definition video. MISB KLV data travels along with the H.264 compressed video stream in accordance with the MPEG2-TS specification. KLV (Key-Length-Value) is a data encoding standard, often used to embed information in video feeds.

RTP MJPEG

SightLine Applications provides the option to output video via Motion JPEG (M-JPEG) encoded RTP streams over Ethernet. An RTP M-JPEG stream can be viewed by an open source program called JM-Studio. Multicast is supported which enables multiple network clients to view the same video stream.