Ensuring consistent colours in workflows and why colours do not match perfectly on different devices in practice.To the article
Correct colour rendering on the monitor is a key factor
In digital workflows, images are being checked on monitors more and more often. It is undoubtedly very important that the monitor used renders all colours authentically. The monitor itself has to have excellent colour rendering with smooth colour gradients and correct settings for colour temperature, brightness, and colour tone. It is also key that all monitors used within the workflow display these features in the same way.
Monitors should be calibrated on a regular basis
If the possibilities of a monitor are to be utilized optimally, regular calibration is essential. Even when working with new monitors, it cannot be assumed that they are correctly configured. They have to be calibrated so that they meet the requirements of the environment in which they are used, and the challenges posed by their intended purposes. When used for extended periods, colour rendering on monitors may change over the course of time. The colour rendering of a monitor that was originally calibrated correctly may deteriorate little by little. To counteract these changes, monitors should be calibrated at regular intervals. For monitors that are newly introduced in a workflow, calibration in shorter intervals is recommended initially (weekly/fortnightly). After this, given correct and stable colour rendering, it is sufficient to perform calibration on a monthly basis or every six weeks.
Given the great importance of correct colour rendering, it is very important to work with a management system that ensures a good rendering environment.
In software calibration, the properties of a monitor are measured and the computer settings are altered using the results of the measurements so that the colour rendering of the monitor is corrected as required by the adjusted output signals. This process is used as standard in calibration software. When using this process, a maximum of 256 colour grades per colour are possible. The data used to set the target colour has to be selected from these 256 stages, meaning that the number of colours that can be displayed is highly limited. However, the advantage of using this method is that any monitors can be calibrated and not only monitors that are suited to hardware calibration.
Hardware calibration is a process to directly adjust the colour rendering by adjusting the monitor settings. The ColorNavigator software, which is included with all ColorEdge monitors, is based on this process. If this process is applied, the output signals of the graphics card remain unchanged. Therefore, there is no limitation of the colour grading and the possibilities of the monitor can be utilized to the greatest extent possible to achieve highly precise calibration. A prerequisite for hardware calibration is a monitor with a look-up table with at least 10 bits per colour.