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    Home > Active Ingredient News > Drugs Articles > A classification of the subjective evaluation method of print quality

    A classification of the subjective evaluation method of print quality

    • Last Update: 2020-11-15
    • Source: Internet
    • Author: User
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    Subjective evaluation methods are divided into visual evaluation methods and qualitative index evaluation methods.
    (1) Visual evaluation method Visual evaluation method refers to the above-mentioned same evaluation environment conditions, by experienced printed images and related industry managers, technical personnel and customers to observe the original and printed materials, according to the subjective impression of the evaluation personnel, to give the quality, good, medium and poor grade, and then count the scores of each printed material,after comprehensive calculation, to arrive at the evaluation results.
    1. Visual evaluation of newspapers and books Newspapers is the country's yu-oriented tool, but also to provide readers with a certain amount of information, evaluation of newspapers, including all pages of the newspaper (including newspapers) content (including advertisements), editing, design, printing four.
    printing quality mainly evaluates the unity of paper, the accuracy of color, error size, photo level, clarity, ink color and so on.
    , first of all, there is a regular publishing house's book number, there is the press and publishing department's serial number, quasi-printing number.
    the evaluation of books and magazines are intellectual, academic, social, creative and printed and framed quality.
    Book printing quality is mainly printing ink uniformity, text loss rate, blindness, dirty degree; binding whether there are small pages, serious folding, broken pages, slurry exceeding the standard, connected page error, crooked, etc.; copyright label printing plant and the actual printing plant should be consistent, otherwise it is considered a serious infringement.
    2. Packaging printed materials Where there must be goods there must be packaging, where there must be packaging where there must be printing.
    as an impression to consumers, packaging quality directly affects product sales.
    evaluation of packaging and printing materials is a comprehensive review of its design, modeling and printing production process.
    , for example, many cigarette cases are now printed in a light style and rich in layers.
    Some use concave printing, a number of processes cross-use - the use of multi-level plate printing, in order to obtain a rich level and transition to nature;
    With the continuous development and application of new processes and materials, packaging printing not only has clear images, rich colors, field flat, uniform, full-plate ink bright and other printing requirements, but also design style and new technology application requirements.
    are also determined by the jury on the basis of the evaluation item.
    such as tables 1-1.
    table 1-1 packaging printing score standard project scoring index scoring rules are worth sub-innovative (50 points) design innovation design is novel and unique, and make printing value-added 10 technological innovation whether there is a major technological innovation, whether these innovations are significant, practical and effective 10 process innovation of the materials used in the work, processing technology and post-press binding and other innovative 10 applications of innovative innovative comprehensive evaluation of the application areas involved in the work 10 application (30 points) market prospects whether end customers can be well accepted, whether it is easy to promote 10 printing value-added space in the market can provide a larger value-added space for printing, cost and market value relatively low 10 industry promotion value of the print will have a significant impact on the industry targeted, in the industry promotion value is huge 10 finished product quality (20 points) text sharp 20 color reduction high, intermediate color accurate, color field space thick, Gradient transition from heat level bright tone and dark tone detail reflects the whole visual overall visual feeling of delicate works good single score innovative score applied score finished product quality score total score (ii) qualitative index evaluation method Qualitative index evaluation method refers to the information surface given a Qualitative indicators, such as texture, gloss, sharpness, softness, skin tone, etc., list three aspects of quality for each indicator: the importance of color, level and clarity, scored by a number of experienced evaluaters, and thenfor total score statistics.
    requires evaluators to think of themselves as instruments and to evaluate the quality of printed materials as objectively as possible from a technical point of view.
    This evaluation method can be separated from the original and directly analyze the quality of the printed material, it first according to the similarity of the sample to group the sample, and then according to the quality of each group to give its quality grade order, and then in each group to compare the sample analysis,after the quality of the sample.
    It is worth noting that the comparability between different image content and prints with different purposes of use is often different, so it is important to consider the preferences of customers or consumers as much as possible and compare and analyze them between the same samples.
    (iii) Analysis of subjective evaluation scoring data Because the quality variables of subjective evaluation are multi-only, and the score of subjective evaluation is handled, the scientific method is to use multi-only analysis.
    to judge a problem needs to understand the characteristics of all aspects, that is, to test different quality items.
    common multi-only analysis method has multiple regression analysis method, multi-scale analysis method, main component analysis method, factor analysis method and cluster analysis method.
    printing industry mainly apply multi-scale method, pair comparison method and so on.
    Multi-scale is a scale technology based on statistical statistics, which is mainly used to explore the similarity or non-similarity of the study object, through appropriate dimensional reduction, the similarity or non-similarity in low-dimensional space to the distance between points, and therefore can also identify some factors affecting the similarity of the object.
    to convert the difference level to the object distance, which can generally be expressed as a geometric distance.
    if you record this difference on a straight ruler, the scale value on the ruler shows this distance, which can then be used to create a geometric model that reflects the relationship between the samples by more than one degree.
    as long as the distance matrix between objects is obtained, their similarity perception map can be produced by the corresponding statistical software.
    the artificial operability of this method of analysis is low, it can not be widely used in domestic research, and most of the comparison methods are used in practice.
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