New high-performance cameras from Stemmer Imaging
20 October 2013
Stemmer has added several advanced camera modules to its range, including two 20-megapixel units from JAI and a new HD camera from Sony featuring 'enhanced visibility.
Now available from Stemmer Imaging, two new, high performance monochrome and colour 20 megapixel cameras from JAI operate at 30 frames per second, and their combination of speed and resolution makes them ideal for persistent surveillance, border security, aerial mapping, and other outdoor applications.
Incorporating the CMOSIS CMV20000 imager, the Spark series of cameras offer full frame resolution of 5120 x 3840 pixels with a dual CameraLink interface capable of supporting multiple data rates in either Medium or Full configurations. Power can be supplied through the CameraLink connectors using a dual-channel-powered frame grabber, or can be provided via the separate 12-pin connector.
Outstanding image quality with the highest degree of pixel uniformity results from the CMOSIS 8-transistor (8T) pixel architecture, while an industry-leading 1:50000 light rejection ratio gives clean images with sharp contrast. Additional in-camera correction routines have been included to provide significant reductions in pattern noise over previous generations of CMOS cameras.
Outdoor applications particularly benefit from features such as automatic level control (ALC) linking shutter and gain for best exposures under changing light conditions and a built-in dual-slope high dynamic range mode for high contrast imaging situations. An extended operating range of -45°C to +70°C enables the camera to handle a variety of harsh temperature environments.
The SP-20000 has user-defined single and multiple region-of-interest (ROI) capabilities providing image capture flexibility with higher frame rates. Monochrome models include horizontal and vertical binning for increased sensitivity. All models support horizontal and vertical mirroring.
Also new from Stemmer is the high definition FCB-EV7500, part of Sony’s ‘enhanced visibility’ series of camera modules. Operation at full HD of 1080p/60 and 1080p/50 is supported. A visibility enhancer, wide dynamic range and adaptive 2D/3D noise reduction combine to give outstanding image quality even in challenging conditions. The Sony Exmor CMOS sensor gives significantly higher sensitivity than previous Sony HD models.
The new sensor and a newly developed image signal processor give improved image quality in terms of picture sharpness and colour optimisation. The ‘visibility enhancer’ is a key new feature which allows for adaptive contrast display in the captured image.
Various contrast settings can be applied to different areas of the image to give the best overall picture. This facility is ideal for use in mist or smoke as well as in scenes with a general wide dynamic range.
In addition there is a wide dynamic range function which allows 2 frames to be captured at varying exposures at full resolution in order to combine high and low contrast areas. This is extended to four frames when operating at 720p resolution. This new wide dynamic range feature is then combined with the visibility enhancer to give great results in all lighting conditions.
In addition, the high frame rate at full 1080p resolution (previous HD modules only supported 30 fps) means that fast moving images are seen in a more natural smooth motion. 30x optical zoom is provided. Adaptive 2D and 3D noise reduction further enhances image quality whilst minimising motion blur.
The new camera will automatically adapt the level of 2D/3D noise reduction in different areas of the picture depending on whether the area is static or moving. 3D noise reduction is applied to static areas by comparing multiple frames to reduce noise most effectively. 2D noise reduction is applied to areas of movement to reduce noise without trailing effects.
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