Complete image details

Images are the basis of human vision, an objective reflection of natural scenery, and an important source for humans to understand the world and humans themselves. "Picture" is the distribution of light reflected or transmitted by an object. "Image" is the impression or understanding of the picture in the human brain that is accepted by the human visual system. Photos, paintings, cliparts, maps, calligraphy works, handwriting sinology , faxes, satellite cloud images, film and television images, X-rays, electroencephalograms, electrocardiograms, etc. are all images. Basic introduction Chinese name: Image Foreign name: Picture Definition: Refers to the general term for various graphics and images. Function: Constructs an image thinking model for human beings. Benefits: Helps us learn and think about problems, word concepts, basic information, and basic meanings. 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, word concept basic information word entry image English image Pinyin tú The basic meaning of xiàng phonetic ㄊㄨˊ ㄒㄧㄤˋ is a similar and vivid description or *** of an objective object. It is the most commonly used information carrier in human social activities. In other words, an image is a representation of an objective object, which contains information about the described object. It is people's primary source of information. According to statistics, about 75% of the information a person obtains comes from vision. Glass images In a broad sense, images are all images with visual effects, including: on paper media, on negatives or photos, on television, projectors or computer screens. Images can be divided into two categories according to the way they are recorded: analog images and digital images. Analog images can record image brightness information through changes in the intensity of a certain physical quantity (such as light, electricity, etc.), such as analog TV images; while digital images use computer-stored data to record the brightness information of each point on the image. Junyouhui, an international image art promotion organization, explains the image processing process as follows: Image processing is a technology that analyzes, processes and processes images to meet visual, psychological and other requirements. Image processing is an application of signal processing in the image domain. Most images are stored in digital form, so image processing often refers to digital image processing. In addition, analog image processing methods based on optical theory still occupy an important position. Image processing is a subcategory of signal processing, and is also closely related to fields such as computer science and artificial intelligence. Many traditional one-dimensional signal processing methods and concepts can still be directly applied to image processing, such as noise reduction, quantization, etc. However, the image is a two-dimensional signal. Compared with the one-dimensional signal, it has its own special side, and the processing methods and angles are also different. A few decades ago, image processing was mostly performed by optical devices in analog mode. Due to the inherent parallel nature of these optical methods, they still occupy a core position in many application fields, such as holography. However, due to the substantial increase in computer speed, these technologies are rapidly being replaced by digital image processing methods. In a general sense, digital image processing technology is more universal, reliable and accurate. They are also easier to implement than simulation methods. Specialized hardware is used for digital image processing, for example, pipeline-based computer architectures have achieved great commercial success in this regard. Today, hardware solutions are widely used in video processing systems, but commercial image processing tasks are still basically implemented in software and run on general-purpose personal computers. Any single geometric figure presented in a layout: (1) A drawn figure as a base map or part of a layout; (2) An optical image projected on a screen or viewed visually, usually enlarged or reduced several times; (3) ) The silicon dioxide image etched on the oxidized silicon wafer; (4) The photographic image on the optical mask and in the latex layer on the photographic substrate or dry plate; (5) The coating on the substrate after exposure and The photoresist pattern that appears after development. Digital images are images produced by capturing actual images with input devices such as scanners and cameras. A bitmap composed of pixel dots. Images use numbers to arbitrarily describe pixels, intensity and color. The description information file has a large storage capacity, and the described object will lose details or become aliased during the scaling process. In terms of display, it resolves the object to a certain resolution and then presents the color information of each point in a digital form, which can be directly and quickly displayed on the screen. Resolution and grayscale are the main parameters that affect display. Images are suitable for expressing objects that contain a large amount of details (such as light and dark changes, complex scenes, rich outline colors), such as photos, drawings, etc. Complex images can be processed through image software to obtain clearer images or produce special effects. Images in computers can be divided into bitmap images and vector images in terms of processing methods. Physical image: In physics, physical image refers to the use of graphics such as geometric lines and geometric symbols to vividly reflect physical processes, physical phenomena, or various characteristics and changes of objects and substances.

Processing software Commonly used graphics processing software in the field of pre-press processing include: Corel's CorelDraw, Adobe's photoshop, Macromedia's Freehand, three-dimensional animation production software 3Dmax, etc.; in addition, in engineering fields such as computer-aided design and manufacturing, commonly used Graphics processing software also includes: AutoCAD, GHCAD, Pro/E, UG, CATIA, MDT, CAXA electronic drawing plates, etc. These software can draw vector graphics, mathematically define the processing information of page elements, can independently move, scale, rotate and distort vector graphics and graphics elements, and can output graphics at different resolutions. Storage format: Since graphics only save algorithms and related control points, graphics files generally occupy less storage space. However, when displayed on the screen, due to the calculation process of scanning conversion, the display speed is slightly slower than that of images. It seems slower, but the output quality is better. Commonly used graphics file storage formats include: PNG format PNG is a file format that compresses bitmaps without distortion (reversible) and has interchangeability. It also provides a "patent-free" file format, supports color wheel, grayscale, full-color and other modes, and can also support transparency processing. CDR format is a graphics file storage format dedicated to CorelDraw software; AI format is a graphics file storage format dedicated to Illustrator software; DXF format is a graphics file format of AutoCAD software, which stores graphics in ASCII mode. It can be called and edited by CorelDraw, 3Dmax and other software. EPS format This format is a universal format that can be used for encoding vector graphics, pixel images and text, that is, recording graphics, images and text in one file at the same time. Image File Format and Processing Software The most commonly used image processing software in the prepress field is Adobe's Photoshop software. This software is widely used in image processing work in various fields and almost occupies the dominant position of computer image processing software. An image is made up of a series of ordered pixels. Commonly used storage formats in computers include: BMP, TIFF, EPS, JPEG, GIF, PSD, PDF and other formats. Among them: BMP format is the standard image file format in Windows. It describes bitmaps in a device-independent way. Various commonly used graphics and image software can edit and process image files in this format; TIFF format is Commonly used bitmap image formats, TIFF bitmaps can have any size and resolution. Images used for printing and printed output are recommended to be stored in this format; JPEG format is an efficient compression format that can compress images Perform substantial compression to save network resources to the maximum extent and increase transmission speed. Therefore, images used 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 takes up less space and is suitable for network transmission. It is generally used to store animation effects pictures. PSD format This format is a standard image file format used in Photoshop software. It can retain the layer information, channel mask information, etc. of the image to facilitate subsequent modification and special effects production. Generally, images produced and processed in Photoshop are recommended to be stored in this format to preserve data information to the maximum extent. After the production is completed, they can be converted into other image file formats for subsequent typesetting, imposition, and output work. PDF format, also known as portable (or portable) file format, has cross-platform characteristics and includes effective control information for professional plate making and printing production. It can be used as a common file format in the prepress field.