HDR for Line Scan Camera Applications
Our vision system for HDR images with a wide dynamic range
Large differences in brightness often occur in line scan applications. As line scan sensors do not always capture the brightest and darkest areas of the image (i.e. the full dynamic range), image content can be lost. Our vision system--consisting of a racer 2 L line scan camera, programmable ImaFlex frame grabber, and HDR applet--solves this problem.
Advantages of HDR images in line scan camera applications
A high dynamic range (HDR) enables the reliable capture of details in bright and dark image areas. This makes it possible to perform line scan applications such as the inspection of shiny or reflective surfaces. By conducting your line scan camera application with HDR, you benefit from the following advantages:
Bright areas are precisely detected without burning out.
Details in the dark areas are retained and are not lost.
Thanks to the high dynamic range, more reliable error detection and quality control are possible.
Efficient image processing, because accidental activation caused by too much or too little light can be avoided.
HDR image creation in line scan camera applications
HDR images can be calculated with the pylon Software Suite within the camera and then transmitted to the host. The plug-and-play solution uses a simple algorithm to generate HDR image quality that is sufficient for many applications.
For applications with glossy or reflective surfaces, HDR images can be calculated using a more complex algorithm on a frame grabber.
HDR image creation on the frame grabber
The images captured with a 4-lineacer 2 L line scan camera are processed on an ImaFlex frame grabber with HDR Applet into an HDR image. The HDR image is then sent to the host.
Your advantages when creating HDR images on the frame grabber:
HDR applet with an optimized algorithm, use of other HDR algorithms is possible if required
High information content of the image data for optimal image results
Reduction of the amount of data transferred to the host by up to a factor of 4, enabling full CPU capacity for post-processing and error detection
Maximum flexibility in terms of image result and line rate: two or four lines can be used for an HDR image as required and the image result optimized
Our experts provide you with technical support for your HDR vision solution
Get technical adviceLine scan applications that benefit from HDR image creation on the frame grabber
An HDR vision solution with a line scan camera, frame grabber, and applet is ideal when materials are highly reflective or objects with very different brightness levels need to be acquired.
Battery cell production
In battery cell production, highly reflective copper foil is coated with black lithium paste. The large differences in brightness must be reliably absorbed.
Inspection of solar modules
Reflective glass and metal surfaces are typical for solar modules. All image content must be reproduced precisely.
Display inspection
When inspecting displays, test images with very bright and very dark areas are used. The vision system must capture the full dynamic range.
Detailed overview of the advantages: Optimum image quality thanks to extended dynamic range
A high dynamic range in machine vision systems enables the reliable detection of details in bright and dark image areas. This allows demanding tasks with difficult lighting conditions to be executed precisely. The advantages include
Preservation of fine image details in light and dark areas
A high dynamic range ensures that details remain visible in bright and dark areas of the image - for example on reflective metal parts and in shaded areas.
Precise object detection and reliable classification
A wide dynamic range reliably detects bright and dark objects, thus increasing detection accuracy and system reliability.
Improved image quality and reduced noise thanks to optimized correction processes
Optimum exposure minimizes image noise, especially in dark areas. This enables the analysis software to achieve precise results.
Increased process reliability and productivity
A high dynamic range in automated production processes lowers error rates, reduces reworking, and shortens cycle times.