Initial results show the achieved mean accuracy for in-gamut colors is less than 1 ΔE. In each iteration a new coverage is printed and measured by the ILD, the algorithm calculates the change in coverage that is estimated to provide an output that is likely closest to the target Lab values required by the user. Required colors are specified by their Lab values. Our method is an iterative scheme that contains a feedback from a simple In-Line Densitometer (ILD) located in the paper path of many industrial presses after the printing engine (all our experiments have been conducted on HP Indigo presses). We propose a method for spot color printing using the set of available inks on the press. However, in most cases the accuracy of these tables is not perfect over the whole color gamut and further tweaking must be performed in order to achieve better accuracy, which increases the setup time for each job. The most common is the use of special color conversion tables. However, the design of the ink is not always feasible, and may be very expensive. Currently few solutions are possible: One solution is using special inks. In Enterprise printing this can apply to company logos. packages, labels, banners, and adds of the same product). In industrial printing this applies often to product colors which have to be consistent across printing sessions of the same product and across printing technologies (e.g. In many applications a very accurate color needs to be achieved in print.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |