Technical White Paper

The allPIXA pro, allPIXA wave and allPIXA evo camera can be used to trigger up to four different flash controller channels synchronized to its line acquisition. This can be used to acquire several images with different illumination geometries and/or colors (white, red, green, UV, IR) simultaneously in only one scan by line-multiplexing.

The Application Report discusses different illumination approaches for inspecting reflective surfaces, highlighting the challenges of achieving both homogeneous lighting and efficient imaging. specifically in connector pin inspection. The standard brightfield illumination principle relies on the law of reflection, but it can result in blurry images. A diffuser is commonly used to achieve uniform lighting, but it reduces efficiency.

Capturing yield limiting defects is crucial for semiconductor wafer devices yield. Here we describe how semiconductor wafer manufacturing can take advantage of its ultra-high resolution 15,360 pixels and rich features to advantage of in-line inspection systems allPIXA wave Trilinear color and mono TDI line scan camera.

The white paper gives a general overview as well as to function as a reference for all tasks related to synchronizing allPIXA classic, allPIXA pro and allPIXA wave cameras.

CS-3D-Api now has a GPU implementation of an alternative 3D reconstruction method to the existing block-matching (BM) approach. The approach is based on the semi-global matching (SGM) algorithm, which is very accurate at object borders, fine structures and in weakly textured terrain. It combines concepts of global and local stereo methods for accurate, pixel-wise matching at low runtime.

This white paper gives a comprehensive overview on the limitations of the block-matching approach in height reconstruction for passive stereoscopy. It describes a variety of different artefacts that appear at certain image features. The occurrence of the artefacts is explained by means of the algorithms underlying mathematical model which is introduced in the first chapter. Images captured with a 3DPIXA exemplify the visual appearance. 

When designing spectral camera sensitivity curves for multi-channel cameras, various aspects have to be considered. In addition to the feasibility of the found function, these are the saturation behavior and the signal-to-noise ratio under the assumed lighting conditions. This article focuses on the colorimetric re-production properties of the filter functions. The R-Matrix theory propagated by the color scientist Jozef Cohen is used as an instrument of investigation.