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  • System for testing fused imagers
  • System for testing fused imagers
  • System for testing fused imagers
  • System for testing fused imagers
  • System for testing fused imagers
  • System for testing fused imagers
  • System for testing fused imagers
  • System for testing fused imagers

FUDIT150

Article: 00249833

System for testing fused imagers

Fusion imaging systems offer increased surveillance capabilities due to fusion of thermal image with classical visible image. The fusion systems are typically built using a multi-sensor imaging system composed with a thermal imager and a visible imaging camera (night vision device, visible camera). Near perfect alignment of these two types of images is one the biggest challenges in design of fusion imaging systems. It is quite common to find on market fusion imager that generate output fused image with significant alignment defects: thermal image of targets of interest does not overlay exactly with visible image of the same targets or image processing software is too slow. Testing and alignment support of fusion imagers at design stage is challenge for typical laboratory test systems built as image projectors. The typical test systems can project both thermal image and visible image of simulated reference target but only separately. These two images cannot be projected at the same time because typical test systems for testing multi-sensor imagers used two mechanically exchangeable radiation sources: differential blackbody and visible light source. FUDIT is a specially modified DT system to be optimized for testing fused imagers that enables projection at the same time of two types of images (thermal image and visible image) of regulated contrast. In this way realism of projected scenery is improved comparing to typical DT systems. FUDIT offers following test capabilities: 1. support for aligning of two channels of fused imagers 2. measurement of parameters to characterize thermal imaging channel: MRTD, MTF, SiTF 3. NETD, FPN, nonuniformity, distortion, FOV 4. measurement of parameters to characterize visible imaging channel: MTF, distortion, FOV 5. measurement of parameters to characterize quality of image fusion: boresight errors for different parts of image, NFMRD, NFMTF. Support for aligning of two channels of fused imagers is offered by projecting images of reference targets that are visible for both channels of tested fused imager. Boresight error between two channels are visible in form of shift between two images. BOR software enable precision measurement of such image shift.

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