Turn your camera into a luminance meter
iQ-Luminance is a convenient tool that will help to turn your camera into a luminance meter. Using a calibrated camera for this purpose allows you to outperform conventional luminance meters on the one hand, and keep your costs low on the other.
Common luminance meters are only single spot measurements with a narrow field of view. Thus, measuring luminance at many different points, one at a time, becomes a time-consuming process. Moreover, when the light in the scene changes over time or the region of interest is much smaller than the field of view of the measuring device, luminance assessment can even become an impossible task. At the other end of the scale, imaging luminance meters that can capture spatial-distributed luminance using a sensor array in one shot can be far too expensive for specific applications.
The iQ-Luminance software calculates luminance values from the image data taken by the calibrated camera. The obligatory camera calibration provides the knowledge, how the raw RGB data from the camera can be mapped to the luminance considering various exposure settings. This device and lens-specific calibration are performed in our iQ-Lab.
The iQ-Luminance software’s new version (Version 2.2) increases flexibility and delivers more reliable readings from a captured image. It is now possible to calibrate at several f-stop levels and ISO-settings and to take the lens’ shading into consideration.
Affordable and flexible
- Non-recurring expenses for camera calibration and software
- Field of view, exposure parameters and overall performance only limited by the camera/lens combination
- Calibration can be carried out on different camera settings
- Exposure settings for the respective situation can be adjusted when preparing the measurement images
- Simultaneous measurement at millions of points in a scene with a few shots
- The ratio between different points is unimpaired by temporal changes of the light conditions
- Evaluate captured images at any time
Consideration of image errors
- Accounts for the vignetting at the image's edges (shading)
- The entire field of view can be used as a measuring field when considering shading
- Set ROI's (regions of interest) at the edge of the image field
- Entering new maximum and minimum values for scaling, the user can compress the scale and enhance visualization
Easy to use
- Measurement of luminance value at any arbitrary point in the image
- Rectangular, elliptical or circular measuring spots in various sizes
- Evaluation of the luminance distribution along a line
- Comfortable visual assessment using a false color or greyscale luminance display