[Abstract] Digital processing technology has been widely used in all current industries. Image special effects processing technology has also played a very good role in the design of packaging and decoration. This article introduced the concept of digital images, focusing on the principle of special effects processing technology for packaging and decorating patterns and how to develop the image special effects software.
[Keywords] packaging and decorating, digital image processing, special effects processing
Today, as the packaging industry thrives, people are increasingly feeling that packaging has brought about ever-changing changes in our lives. This change is not only reflected in the novelty of the model, but also manifested in the diversification of the effects of the package decoration pattern. The design of a flat design of a packaging pattern not only reflects the designer's thoughts, but also reflects whether the society can possess the technical level of grasping the photographic vision that turns ideas into reality. How to better display patterns in front of people depends on the improvement of digital image processing technology.
In the process of understanding nature, mankind learned a wealth of knowledge from the diversities of the world. With the ever-increasing level of productivity, packaging's creative ideas and design ideas have become more and more abundant. Facts have proved that a color and form are beautiful and very new packaging. The sense of value and the strength of advertising information can satisfy the consumer's desire for safe consumption. It is inevitably less than a sense of beauty, ambiguity in the transmission of information, Packages that are inconsistent with the value of the packaging and the value of the goods have a much stronger incentive for consumers. The visual communication and displayability of the package have a good advertising effect for expressing a product effect. In the process of decorating design, the first thing the designers get is not a ready-made good material. The designer can only use the tools to achieve the effect of decorative patterns step by step. In order to make the effect clear and highlight the focus, we can use special effects processing technology. This is the digital image processing technology described below.
1. The basic concept of digital images
Digital Image Processing, also known as computer image processing, refers to the process of converting an image signal into a digital signal and processing it with a computer. At present, digital image processing technology has been widely used in many fields, such as aerospace, biomedical engineering, industrial inspection, robot vision, public security, justice, military guidance, culture and art.
"Figure" is the distribution of light projected or reflected by the object. "Image" is the impression or reflection of the acceptance of the human vision system in the brain. It is a combination of subjectivity and objectivity.
1.1 Digital Image Processing
1) The process of converting an image into another processed image is an image to image process.
2) Convert an image into a non-image representation, such as a decision.
An image is a vivid imitation or description of a similarity to an objectively existing object. It is an incomplete and inaccurate object, but it is a proper representation in a certain sense. Digital image processing is the use of computer systems for digital images for various purposes.
1.2 Computer Graphics
Uses computers to process and display objects (not physical objects) represented by concepts. Focus on generating an image based on a given object description model, lighting, and the imaging geometry of the imaginary camera. Including art creation called "computer art."
1.3 Characteristics of the Image
A color image can be seen as consisting of many points. A single point in the image is called a pixel. Each pixel has a value, called a pixel value, which indicates the intensity of a particular color. A pixel value is often represented by three components of R, G, and B. If each color component of each pixel is represented by a binary 1 bit, then each color component has only two values â€‹â€‹of "1" and "0". This means that the intensity of each color is 100%, or 0%. In this case, the color displayed by each pixel is one of eight possible colors.
Image attributes include resolution, pixel depth, true/false color, image representation and type, and more. There are two kinds of resolution: display resolution and image resolution. The display resolution refers to the number of pixels that can be displayed on the screen. The more pixels the screen can display, the higher the resolution of the display device and the higher the quality of the displayed image. Each color pixel on the display is determined by the relative intensities of three analog signals representing R, G, and B. These color pixels form a color image. Image resolution refers to the measure of the density of pixels that make up an image. For a picture of the same size, if the number of image pixels that compose the picture is larger, the higher the resolution of the picture, the more realistic it looks. On the contrary, the image looks rough. Pixel depth refers to the number of bits used to store each pixel. It is also used to measure the color resolution of the image. The pixel depth determines the number of possible colors for each pixel of the color image, or determines the number of possible gray levels for each pixel of the grayscale image.
These are the factors that understand basic image processing. Such basic elements are fully understood to solve the access points that require the implementation of the functions. The realization of various image effects is to obtain specific effects based on changing pixels.
2. Image file format
When dealing with the image files we need, we encounter many practical problems. The images have different formats. They use different methods for organizing and storing pixels. Different file structures form various formats. The software we require is capable of supporting reading and conversion of multiple image formats. The use of various image formats depends on different environments. With the advancement and development of science and technology, there will be more new image formats.
Windows relies on graphics to communicate with users. Bitmaps are the bridge to image processing and graphic design. Both drawing and image editing software produce bitmap images, also known as raster images. Bitmap images are represented by small square grids (bitmaps or grids), ie pixels, each of which is assigned a specific position and color value. When working with bitmap images, you edit pixels instead of objects or shapes. Bitmap images are related to resolution and contain a fixed number of pixels representing image data. Therefore, if you zoom in on the screen at a larger magnification, or print at an under-resolved resolution, the bitmap image will appear jagged and details will be missing.
The general high-level programming language does not have a statement that can be directly used to satisfy the display reading function. The programmer must solve it through low-level programming, which requires a clear understanding of the structure of the image file. Bitmap bitmap format is the basis for the transformation of each image file, so we need to have a sufficient understanding of the basic operation of the bitmap. When performing image processing, the format of the read image needs to be converted into a bitmap to work, and the problem of decoding and compression of the format needs to be solved.
3. Decoration image special effects processing
The processing of decorating images on a computer is the processing of digital images. The process of creating ornamental patterns is the process from images to images. As a result, special effects in packaging and decorating have also been transformed into digital image processing technology. Image special effects mainly refer to a special display effect that an image is displayed on the screen in a natural and soft manner according to different algorithms. In addition to being treated like an artist according to the author's feelings, it also provides an accurate physical description of each processing tool. For example, in image design, there are more Photoshop filter functions that come into contact.
As image technology has received great attention and rapid progress in recent years, many new theories, new methods, new algorithms, new methods, and new devices have emerged. The core technology of image processing software is image processing technology, namely image processing algorithm. To achieve a special effect requires an algorithm support, as long as there is support for the algorithm can achieve the required function. The algorithm is a bit processing algorithm and a region processing algorithm, and their processing is related to pixels.
Point processing is a technique for processing a single pixel and is an algorithm that processes an image based solely on the value of a single pixel. The biggest feature of this algorithm is that the current pixel has nothing to do with other pixels. That is, the currently calculated pixel value depends only on its original value. This algorithm uses point-to-point processing, which is generally reversible. In the implementation of the algorithm, the point processing algorithm generally adopts a point-by-point scanning method or a lookup table to complete the pixel processing. Unlike point processing, the area processing of an image is related to a set of neighborhood pixels of the current pixel. With regional processing algorithms, certain specific frequency components in the image can be reduced or enhanced. Therefore, designing a region processing algorithm is to design a spatial filter.
A good software must be performed on the operating system's operating platform. The Windows system has a huge scope of use. It provides a graphical user interface, and users can generate current feedback on operations. The programming language choice should be the port that can access Windows, and go deep into the hardware to complete the intended function.
For color images, its display must start with the three primary colors RGB. When each pixel in a picture is given a different RGB value, it can present colorful colors. The color value is an important processing point for image processing. Various trick switching displays act by changing the brightness or RGB value.
In general, the successful application of a package decoration pattern includes a lot of processes. First of all, it is necessary to be able to read and store the image, and then use various arithmetic algorithms to realize the special effect display function of the image. The core technology of image processing is the choice of image processing algorithms. We can only organize the functions properly by choosing the algorithms reasonably. In the realization of the algorithm, the point processing algorithm generally adopts a progressive scan method or a way of finding the table to complete the processing of the pixels. In combination with the actual function, the area algorithm is used more. The design of each algorithm will be the key to the realization of special effects. The actual analysis of actual problems will combine the knowledge of arts and the reasonable solution of all technical requirements. These aspects need to be gradually improved in the actual design.
School of Printing and Packaging, Xi'an University of Technology Ji Fengmin Wang Jiamin and Ke Zhi
Source: China Packaging