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CONCRETE PRODUCTS & CAST STONE76 CPI %u2013 Concrete Plant International %u2013 3 | 2025 www.cpi-worldwide.comSet tolerances for parameter deviationsRequirements for color stability and uniformity of color components may differ in different factories. The limits of permissible deviations depend on these criteria.Configure color conversion between wet and dry sidesThe color of the surface on the wet side and on the dry side can vary significantly. It is advisable to perform this nonlinear transformation using machine learning methods, using real data from a specific plant and a specific composition of the concrete mixture. The system, trained on reference data, will be able to predict the color of the product on the dry side based on the image of the wet side.Control of color compliance with the standard A prepared standard is an objective description of a color sufficient for its monitoring. Once again, color monitoring is important at all stages of the technological process: On the wet side to influence the production process and adjust technological production parameters in a timely manner, on the dry side to assess the final quality of the finished product and rejection.Previously, the concept of a color standard was formulated as a set of three groups of parameters: the value of the color code in the RGB space, the colors proportion, and the characteristic size of the colors zone. Monitoring compliance with the standard implies monitoring the compliance of all given parameters. Due to their large number, a simple visualization for this task has yet to be developed. Following several examples will illustrate the consistency of the selected parameters.Example for monocolorIn the case of monocolor, the only control parameter is the color code in RGB or another color space. The difference between the observed color vector and the reference value can be converted into a single number (modulus) and plotted. Example for colormixIn the case of having several colors to control, the hue parameter of each color component becomes less significant The graph shows how, with the next batch of concrete mixture, a shade is obtained that differs from the previous one within the batch.24 minute break35 minute breakPause at 1h20mEmpty palletsAn example for a color mix close to the standard and a color with unacceptable deviations