Application of digital special effects processing technology for decorating images (2)

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 decorating patterns is a process from images to images. As a result, special effects in packaging and decorating have also turned into digital image processing technology. Image special effects mainly refer to the special display effect that an image is displayed on the screen by different algorithms in a natural and soft manner. 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 many 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 look-up table to complete the processing of the pixels. 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 selection of image processing algorithms. We can only organize the functions properly if we choose the algorithms reasonably. In the implementation 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 regional 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
<China Packaging>