Our data base with image quality measurements of consumer cameras and system cameras, including DSLRs and lenses, grows almost every day. Based on our measurements for magazines it consists of more than 200 consumer cameras, more than 100 SLR and mirrorless system cameras, and more than 350 lens camera combinations (status Feb. 2013). The database is an ideal tool for setting up a side by side quality comparison of various devices.

All measurements are based on existing and upcoming ISO standards and other international standards where available. The data measured includes: OECF (ISO 14524), Noise (ISO 15739), Signal to Noise Ratio (ISO 15739), Visual Noise (ISO 15739), Dynamic Range (ISO 15739), White Balancing, Color Reproduction (ΔE, ΔL, ΔC, ΔH, based on CIE 15), MTF (upcoming ISO12233 revision), Resolution (center, corners, upcoming ISO12233 revision), Acutance (contrast weighted with contrast sensitivity function of the human eye, CPIQ).

All Parameters are tested at all full ISO sensitivity steps. In addition there is Start-up time (ISO 15781), Shutter-time-lag (ISO 15781), and Shooting-time-lag (1000 lux viewfi nder, 1000 lux live view, 30 lux viewfi nder, ISO 15781), Frame Rate (frames per second, ISO 15781), Frame Sequence (number of frames in sequence, ISO 15781), Flash Guide Number (ISO 1230).

Test images taken of the TE42 target are available. Included in a yearly free is a subscription to the database und usage of the data for internal analysis or marketing purposes.

The only commonly known source for some in situ measured spectral radiances until now was ISO 17321-1. It describes the principle of how the color characterization of a digital camera works and provides spectral radiance for 14 common objects. Our in situ spectral radiance data project was started in order to collect several thousand measurements of all different kinds of objects under various illuminations keeping in mind typical scenes and objects that people take pictures of.

Why in situ?
In many cases the spectral radiation of objects is not only that of the refl ected light. Some objects like leaves have a transmissive part. In other cases inter refl ections between the objects modify the spectral radiance in scenes and some objects, like the human skin, appear totally different in real life compared to the skin tones of a reflective color target.

What for?
The collected data can be used as a scientifi c data base for different studies related to natural objects. But the main reason for collecting the data was to provide training data for the color characterization of digital cameras in combination with their spectral sensitivities. Currently a total number of app. 2500 measurements are available. With the database, you can optimize your color correction matrix based on real life data, not just a ColorChecker in your lab.
iQ-data -collage-screenshot iQ-data-in-situ-collage-screenshot
iQ-data in situ data


排列方式: 直列式 / 棋盤式
STARTER KITS It happens quite often that we are asked about a standard set of test targets. S..
iQ- SIMULATOR Simulate your sensor output before you build the camera! product only on r..
Powered By DHD © 2012