It's like a complete set of details.

Images are the basis of human vision, the objective reflection of natural scenery, and an important source for human beings to know the world and themselves. "Picture" refers to the distribution of light reflected or transmitted by an object, and "image" refers to the impression or understanding of the picture accepted by the human visual system in the human brain. Photographs, paintings, clip art, maps, calligraphy works, handwritten sinology, faxes, satellite cloud pictures, film and television pictures, X-rays, electroencephalograms, electrocardiogram, etc. are all images.

Chinese name: image mbth: Picture definition: refers to the general function of various graphics and images: it constructs a thinking mode in images for human beings. Benefits: It helps us to learn and think about concepts, basic information, basic meaning, processing software, storage format, PNG format, CDR format, AI format, DXF format, EPS format, BMP format, TIFF format, JPEG format, GIF format, PSD format, PDF format, basic information of words and concepts, head word images, English image pinyin tú xiàng, and phonetic notation. Or an image is a representation of an objective object, which contains information about the described object. It is the most important source of information for people. According to statistics, about 75% of the information a person obtains comes from vision. In a broad sense, glass images are all pictures with visual effects, including paper media, negatives or photos, televisions, projectors or computer screens. According to the different recording methods of images, images can be divided into two categories: analog images and digital images. Analog images can record image brightness information through the changes of some physical quantities (such as light and electricity), such as analog TV images; A digital image uses data stored in a computer to record the brightness information of each point on the image. Junyou Association, an international image art promotion organization, expounds the image processing process: image processing is a technology that analyzes, processes and processes images to meet visual and psychological requirements. Image processing is the application of signal processing in image field. Most images are stored in digital form, so image processing refers to digital image processing in many cases. In addition, the analog image processing method based on optical theory still occupies an important position. Image processing is a subclass of signal processing, and it is also closely related to computer science, artificial intelligence and other fields. Many traditional methods and concepts of one-dimensional signal processing can still be directly applied to image processing, such as noise reduction and quantization. However, the image belongs to two-dimensional signal, which has its special side and different processing methods and angles compared with one-dimensional signal. Decades ago, most image processing was carried out by optical equipment in analog mode. Because of their parallel characteristics, these optical methods still occupy a core position in many application fields, such as holography. However, due to the rapid improvement of computer speed, these technologies are rapidly being replaced by digital image processing methods. Generally speaking, digital image processing technology is more universal, reliable and accurate. They are also easier to implement than analog methods. Special hardware is used for digital image processing. For example, the computer architecture based on pipeline has achieved great commercial success in this respect. Nowadays, hardware solutions are widely used in video processing systems, but commercial image processing tasks are basically realized in the form of software, running on general personal computers. Any single geometric figure presented in the layout: (1) a drawing figure that is part of the basic map or layout; (2) Optical images projected on the screen or visually are usually enlarged or reduced by several times; (3) etching the silicon dioxide image on the silicon oxide wafer; (4) Photographic images on optical masks and in latex layers on photographic substrates or dry plates; (5) The photoresist pattern presented by the coating on the substrate after exposure and development. Digital images are images generated by capturing actual pictures by input devices such as scanners and cameras. A bitmap consisting of a dot matrix of pixels. Images use numbers to describe pixel points, intensities and colors at will. Description information file has a large storage capacity, and the described object will lose details or produce sawtooth when it is scaled. In the aspect of display, it displays the color information of each point after object analysis in a digital way with a certain resolution, which can be displayed directly and quickly on the screen. Resolution and gray level are the main parameters that affect the display. Images are suitable for representing objects with a lot of details (such as light and dark changes, complex scenes and rich outlines), such as photos and drawings. Complex images can be processed by image software to obtain clearer images or produce special effects. Images in computers can be divided into bitmap and vector images in terms of processing methods. Physical image: in physics, physical image refers to the use of geometric lines, symbols and other graphics to vividly reflect physical processes, physical phenomena or various characteristics and changing laws of objects and substances. Processing Software The graphic processing software commonly used in prepress processing field includes CorelDraw of Corel Company, photoshop of Adobe Company, Freehand of Macromedia Company, 3Dmax animation software, etc. In addition, in computer-aided design and manufacturing and other engineering fields, commonly used graphics processing software also includes: AutoCAD, GHCAD, Pro/E, UG, CATIA, MDT, CAXA electronic chart and so on. These softwares can draw vector graphics, mathematically define the processing information of page elements, independently transform vector graphics and graphic elements such as movement, scaling, rotation and distortion, and output graphics with different resolutions. Storage format Because graphics only need to save algorithms and related control points, the storage space occupied by graphics files is generally small. But when displayed on the screen, the display speed is slightly slower than the image, but the output quality is better. Commonly used graphics file storage formats, including: PNG format PNG is a file format with lossless (reversible) compressed bitmap and interoperability. Moreover, it provides a "patent-free" file format, supports color wheel, gray scale, full color and other modes, and can also support transparent processing. CDR format This format is a special graphics file storage format for CorelDraw software; AI format This format is a special graphics file storage format for Illustrator software; DXF format is the graphics file format of AutoCAD software, which stores graphics in ASCII code and can be called and edited by CorelDraw, 3Dmax and other software. EPS format is a general format, which can be used to encode vector graphics, pixel images and text, that is, graphics, images and text are recorded in one file at the same time. Image file format and processing software Adobe Photoshop is the most commonly used image processing software in prepress field, which is widely used in image processing in various fields and almost occupies the dominant position of computer image processing software. An image consists of a series of pixels arranged in order. The storage formats commonly used in computers are BMP, TIFF, EPS, JPEG, GIF, PSD, PDF, etc. Among them, BMP format is the standard image file format in Windows, which describes the bitmap in a device-independent way, and all kinds of commonly used graphic image software can edit and process the image file in this format. TIFF format This format is a commonly used bitmap image format. TIFF bitmaps can have any size and resolution, and it is recommended to store images for printing and printout in this format. JPEG format is an efficient compression format, which can greatly compress images, save network resources to the greatest extent and improve transmission speed. Therefore, images for network transmission are generally stored in this format. GIF format This format can be used in various image processing software. It is a compressed file format, so it generally occupies less space and is suitable for network transmission. It is usually used to store animated pictures. PSD format This format is a standard image file format used in Photoshop software, which can retain image layer information, channel mask information and so on. In order to facilitate subsequent modification and special effects production. It is generally recommended to save the images made and processed in Photoshop in this format, so as to save the data information as much as possible, and then convert them into other image file formats for subsequent typesetting, imposition and output. PDF format, also known as portable (or portable) file format, has cross-platform characteristics and contains effective control information of professional plate making and printing production, which can be used as a general file format in prepress field.