Accurate Natural Colors in Three Easy Steps
• Take a RAW photo of QPcard 202 or 203.
• Process the photo using the free QPcalibrator software.
• In less than 5 seconds a custom, camera- and light- specific, RAW
profile has been created and automatically saved in the correct folder. Next time you open Adobe Camera RAW you will find your profile under the camera icon.
After doing this the first time, toggle between Adobe normal and your custom profile to compare the difference in color rendering between the profiles. You will be amazed by the difference.
QPcard 202 &203
The design and preparation of the color card is crucial for successful color management of the camera.QPcard 202 &203 have 35 coated color chips mounted on a cardboard surface. The carefully selected color samples are individually mixed in order to achieve as straight-forward spectral response as possible. This is very important in order to avoid undesired metameric effects that can ruin correct evaluation of the color performance.
The color samples are divided into four groups. The primary group has 9 saturated samples of red, green and blue picked to accurately determine the spectral midpoints of the on-sensor filters. The secondary group has 12 samples of complementary colors chosen to properly graduate saturated colors. The grayscale group has 7 neutral samples of different lightness for white balancing and linearization of individual channel response. The pastel group with 7 lighter, still saturated, color samples helps fine-tuning skintones and lighter colors.
The corner-marks of the card are automatically detected by the QPcalibrator software and a grid covering the color patches is created. Every color patch is measured in 6400 spots and the 3200 lightest are discarded. This prevents small dust particles and minor reflections to interfere with the measurement.
Unlike older color targets on the market, the background has been intentionally kept white. This provides an opportunity to evaluate the evenness of the exposure of the card. If the card is unevenly lit, the software compensates in the linear RAW signal with maximum 1,5 EV, assuring high quality profiles even if the card isn’t perfectly