Question 1: What are visual effects? Color composition follows the rules and regulations of beauty, and is a combination of colors and their relationships. Like painting, it is a means of expression for visual art and a visual artistic language. Learning color is to learn and understand color from three aspects: impression (visual), expression (emotion), and structure (symbol).
What is color? Color is an objective material phenomenon and a visual sense caused by light and eyes. It is composed of three conditions for perceiving color: light, object and eyes. Without any of these conditions, people will not be able to accurately perceive colors.
Various light-receiving objects in nature, when illuminated by a light source, have different absorption and reflection capabilities of light due to different object properties. The color of an object you see is the feeling caused by the light reflected back from the light-receiving body and hitting the optic nerve. For example, the red color of an object is formed by absorbing some monochromatic light from the light source and reflecting the red light.
1. The three elements of color
Any color has a certain relationship between brightness, color and purity. This is the basic element of color.
1. lightness. Value refers to the lightness or darkness of a color. The brightness of light is called brightness. Brightness is determined by the amplitude of light. A wide amplitude has high brightness, and a narrow amplitude has low brightness. The greater the amount of light an object receives, the more light it reflects. And there is a pattern, the lighter the color of the object; otherwise, the darker. Black has the lowest reflectivity, and white is the most reflective color. Arrange black and white as the two poles of color brightness, with black as the zero-degree color scale and white as the 10-degree color scale. The colors between them are divided into 9 brightness color scales, forming a brightness color scale sequence.
2. Hue. Hue is the appearance of a color, the surface characteristic that distinguishes one color from another. It is a visual sensation caused by the wavelength of light. The hues of light and objects vary widely, and the number of hues is staggering. It is easy to summarize and organize colors, classify colors with unique factors, and form a certain order, such as: bright red, deep red, rose red, vermilion, magenta and reds of different brightness and purity, all classified into red Department. The determination of the hue order is based on the order of wavelengths in the solar spectrum, that is, red, orange, yellow, green, blue, violet, etc. They are the most prominent and purest typical hues of all colors. The number of hue divisions varies, even as many as one hundred hues. But they are all arranged in spectral order, forming a hue band or hue.
3. purity. Purity is the degree of saturation of a single color contained in a color, also known as chroma. There are many factors that determine color purity. From the perspective of light, the singler the wavelength of the light wave, the purer the color; the more mixed the wavelength of the light wave, the proportion is balanced, so that the color of each monochromatic light disappears and the purity is zero. Any standard pure color, once mixed with black, white, and gray, the color purity will be reduced. The more mixed, the grayer the color will be. When the same high-purity color is illuminated by strong light or weak light, the purity of the color will also decrease accordingly.
From a physiological point of view, because the eyes have different sensitivity to different wavelengths of color light, it also affects the visual difference in color purity. For example, red light waves are most intense and sharp to the eyes, and the brightness of red is high; green light waves are softer to the eyes, and the brightness is low. Therefore, the purity of each hue in the solar spectrum is not exactly the same.
The three attributes of color are interdependent and restrictive, and it is difficult to separate them completely. Changes in any of these attributes will cause changes in color personality. However, they are different from each other and have independent meanings, so they must be strictly separated conceptually.
2. False vision
Although human eyes are extremely sensitive, misperception often occurs. Due to optical illusion, the color entity and color perception are inconsistent. Although color sensation is not a real color entity, it is a spiritual and physical reality. As long as the color contrast factor exists, the optical illusion will inevitably exist, so there is no need to correct it. Due to long-term experience of trompe l'oeil, people believe that the color perception obtained by trompe l'oeil is objective and real. If it is corrected, they will not get used to it. Just like in people's vision, people in the distance are like black dots the size of ants, but no one thinks that people are as big as ants, and no one thinks that the blue-purple trees on the distant mountains are not green trees. Visual art often relies on the phenomenon of optical illusion to create a sense of space and three-dimensionality in flat images, and to truly express natural colors.
There are three main causes of color illusion:
1. False vision caused by physiological structure. Since the eye and the lens cannot fully and precisely adjust the tiny differences in different color waves, long-wave red and orange colors are inverted images in the retina; short-wave blue and purple colors are imaged on the front side of the retina, resulting in false images. When looking at the eyes, red and orange are closer to the eyes than the actual position, while blue and purple are farther away.
Due to the warmth, purity, lightness and darkness of colors, they are good for the eyes...>>
Question 2: What do the various colors mean and what are their visual effects? Red Red
Red is a warm, impulsive, and powerful color. It can speed up muscle function and blood circulation. Because red easily attracts attention, it is also widely used in various media. In addition to having a better visual effect, it is also used to convey corporate image and meanings such as vitality, positivity, enthusiasm, warmth, and progress. In addition, red is also often used as the color for warning, danger, prohibition, fire prevention, etc. When people see red signs on some occasions or items, they often do not need to read the content carefully and can understand the warning and danger meaning. In industry Among safety colors, red is the designated color for warning, danger, prohibition, and fire prevention.
Bright red is generally used to be eye-catching, such as a red flag or a little red among the greenery; light red is generally more gentle and tender, such as: the decoration of a new house, children's clothing, etc.; dark red can generally be used as As a foil, it has a deeper and warmer feeling.
Red is the best match for light yellow, bright red is incompatible with green, orange, and blue (especially darker blue), and is a neutral match with cream yellow and gray.
Orange
Orange is a cheerful and lively brilliant color. It is the warmest color in the warm color system. It reminds people of golden autumn and abundant fruits, which is a kind of abundance. , happy and happy colors. If orange is slightly mixed with black or white, it will become a stable, subtle and bright warm color. But if mixed with more black, it will become a burnt color; if more white is added to orange, it will be sweet. feeling.
Orange has high visibility. Among industrial safety colors, orange is the warning color, such as locomotives, mountaineering clothing, backpacks, life jackets, etc. Orange can generally be used as a festive color, and it can also be used as a wealthy color. , such as many decorations in the palace. Orange can be used as the decoration color of the restaurant. It is said that using more orange in the restaurant can increase appetite.
Orange pairs with light greens and light blues for the loudest, most cheerful colors. The combination of orange and light yellow creates a very comfortable transition. Orange generally cannot be matched with purple or dark blue, which will give people an unclean and obscure feeling. Because orange is very bright and dazzling, it sometimes gives people a negative and vulgar image. This situation is especially likely to occur in the use of clothing. Therefore, when using orange, you must pay attention to the matching colors and expressions in order to make the orange bright and lively. The characteristics of the taste come out.
Yellow Yellow
Yellow is bright and brilliant, with the brilliance of the sun, symbolizing the light of wisdom that illuminates the darkness. Yellow has golden light and symbolizes wealth and power. It is the color of pride. In industrial colors, yellow is often used to warn of danger or draw attention, such as yellow lights on traffic signs, large machines used in engineering, raincoats and rain boots for students, etc., all use yellow. Yellow can achieve infinite expansion of power against the backdrop of black and purple, and a touch of pink can conquer the proud prince of yellow like a girl. The combination of yellow and green looks very energetic and energetic; the combination of yellow and blue looks beautiful and fresh; the combination of light yellow and dark yellow looks the most elegant.
Light yellow can match almost all colors, but if you want to be eye-catching, it cannot be placed on other light colors, especially white, because it will make you unable to see anything. Dark yellow generally cannot be matched with dark red and dark purple, nor is it suitable to be matched with black, because it will make people feel obscure and garbage bin.
Green Green
In commercial design, the image of refreshing, ideal, hope and growth conveyed by green meets the demands of the service industry and health care industry. In factories, for To avoid eye fatigue during operation, many working machines are also made of green. In general medical institutions, green is also often used for space color planning, that is, to mark medical supplies.
Bright green is a very beautiful and elegant color. It is full of vitality and symbolizes life. Green is tolerant and generous, and can accommodate almost all colors. The use of green is extremely broad. Whether it is childhood, youth, middle age, or old age, the use of green will never lose its liveliness and generosity. Green is inseparable from all kinds of paintings and decorations. Green can also be used as a casual color.
Yellow-green infiltrates into green, which is pure and young; blue-green infiltrates into green, which is delicate and open-minded. Gray green is still a quiet and peaceful color, like a forest in twilight or a field in morning mist. The combination of dark green and light green creates a sense of harmony and tranquility; the combination of green and white makes it appear youthful; the combination of light green and black makes it appear beautiful and generous. Green and light red match, symbolizing the arrival of spring. But dark green is generally not the same as dark red... >>
Question 3: What do these computer visual effects mean? 10 points Bluetooth is a transmission mode. For example, your mobile phone also has Bluetooth, and your computer also has Bluetooth. Within a relatively short distance, such as the same room, the two parties can transfer files to each other without the need for a data cable connection.
Question 4: What does vision mean? Basic explanation
Heading: Vision
Pinyin: shi jue
The image of an object*** The feeling produced by the eyes
Vision is a physiological term. Light acts on the visual organ, excitating its receptor cells, and the information is processed by the visual nervous system to produce vision. Through vision, people and animals perceive the size, light and shade, color, and movement of external objects, and obtain various information that is important for the survival of the body. At least 80% of external information is obtained through vision. Vision is the most important thing for people and animals. Feel.
Detailed explanation
Image of an object *** Sensation produced by the retina. Hu Shi's "Reply to Lan Zhixian Shu": "In fact, the 'pinyin text' has two sides, the pinyin sound is 'auditory', and the spelled text is 'visual'." Qu Qiubai's "Introduction": "This shadow! He It always dangles in front of my eyes - it seems to arouse my vision. ”
Vision is the reception of electromagnetic waves within a certain wavelength range in the external environment through the peripheral sensory organs (eyes) of the visual system. The subjective feeling obtained after coding, processing and analysis by the relevant parts of the central nervous system. 95% of the external information people perceive comes from vision.
The human eye can be divided into two parts: the retina of photoreceptor cells (rods and cones) and the refractive (cornea, aqueous humor, lens and vitreous body) system. Its suitable *** is the electromagnetic wave with a wavelength of 370-740 nanometers, that is, the visible light part, about 150 colors. This part of the light is imaged on the retina through the refractive system, and is transmitted to the visual center of the brain through the optic nerve, so that the color and brightness of the objects seen can be distinguished. Therefore, the outline, shape, size, color, distance and surface details of luminous or reflective objects within the visual range can be seen clearly.
Question 5: What does vision mean? Physiological vocabulary
Light acts on the visual organ, exciting its receptor cells, and the information is processed by the visual nervous system to produce vision. ). Through vision, people and animals perceive the size, light and shade, color, movement and stillness of external objects, and obtain various information that is important to the survival of the body. At least 80% of external information is obtained through vision. Vision is the most important thing for people and animals. Feel.
Vision formation process
Light → Cornea → Pupil → Lens (refracts light) → Vitreous body (fixes the eyeball) → Retina (forms object image) → Optic nerve (conducts visual information) → Brain Visual center (formation of vision)
Evolution of photoreceptors
The formation of photoreceptors during the evolutionary process is of great significance for the precise orientation of animals. The simplest photoreceptor is the eyespot of the single-celled protozoan Euglena, which allows the Euglena to make directional phototactic movements. The structure of the vortex flagellates' eyespots is more complete, and they can hunt prey with the help of this eyespot's perception of light. The photoreceptor organs of multicellular animals became increasingly complex and diverse. For example, the retina of a jellyfish is just a plate-like structure made of pigments. This structure can provide the animal with information about the intensity and direction of light. As animals evolved, they developed cup-shaped or sac-shaped photoreceptors with lenses that focus light. Annelida, molluscs, and arthropods often have button-shaped eyes or bulging retinas. These photoreceptors are made up of many structures called eyes arranged on bumps on the body surface, still located in small sacs. The photoreceptor cells in the ommatidium are surrounded by pigments. Light can only enter the ommatidium from one direction, so it can sense the direction of light. During the evolution process, this visual organ manifested itself in specific forms in different types of animals, such as the compound eyes of insects. The visual system of vertebrates usually includes the retina, related neural pathways and nerve centers, and various accessory systems necessary to achieve its functions. These accessory systems mainly include: extraocular muscles, which allow the eyeball to move in all directions; the eye's refractive system (cornea, lens, etc.) to ensure that external objects form a clear image on the retina.
Eye and Retina
The eye is spherical and surrounded by the sclera. The sclera joins the transparent cornea anteriorly. After the cornea is the lens, which is equivalent to the lens of a camera and is the main refractive system of the eye. The anterior and posterior chambers between the lens and the cornea contain aqueous humor. The entire eyeball behind the lens is filled with gelatinous vitreous humor, which provides nutrients to various tissues of the eye and helps maintain the shape of the eyeball. On the inner surface of the eyeball is a layer of retina with a thickness of only 0.3 mm, which is the peripheral part of the visual nervous system. Between the retina and the sclera is the choroid, which is filled with blood vessels and nourishes the retina.
The cornea and lens form the refractive system of the eye, causing external objects to form an inverted image on the retina. The curvature of the cornea is fixed, but the curvature of the lens can be adjusted by the ciliary muscles through the zonular ligament. When the observation distance changes, the focal length of the entire refractive system changes through changes in the curvature of the lens, thereby ensuring that external objects are clearly imaged on the retina. This function is called visual accommodation. When visual accommodation is abnormal, objects cannot be clearly imaged on the retina, and myopia or hyperopia may occur. At this time, appropriate lenses must be used to correct it.
Between the cornea and the lens, the pupil formed by the iris acts as a diaphragm. The pupil shrinks in the light and expands in the dark to adjust the amount of light entering the eye, which also helps to improve the imaging quality of the refractive system. Pupils and visual adjustment are both controlled by the autonomic nervous system.
The movement of the eyeball is realized by six extraocular muscles. The coordinated actions of these muscles ensure that the eyeball can move freely in all directions, allowing the line of sight to change as needed. The activities of the extraocular muscles of the two eyes must be coordinated, otherwise it will cause retinal double images (diplopia) or strabismus.
The retina is a layer of neural tissue containing hundreds of millions of nerve cells. According to the shape and location of these cells, they can be divided into six categories, namely photoreceptors, horizontal cells, bipolar cells, and amacrine cells. , ganglion cells, and interreticular cells newly discovered in recent years. Among them, only the photoreceptors are sensitive to light, and the initial biophysical and chemical processes triggered by light occur in the photoreceptors. The vertebrate retina is inverted due to embryonic development reasons. That is, after light enters the eyeball, it first passes through the network of nerve cells and finally reaches the photoreceptors. However, because nerve cells are highly transparent, it does not affect the quality of imaging.
Photoreceptors and their excitation
Photoreceptors can be divided into two major categories according to their shape, namely rod cells and cone cells.
The photoreceptors in the retina of nocturnal animals (such as mice) are mainly rod cells, while the photoreceptors of diurnal animals (such as chickens, squirrels, etc.) are mainly cones... >>
< p> Question 6: What are visual effects? You will know what visual effects are when you look at the three-dimensional images. It is easy to find three-dimensional images on BaiduPlease adopt them
Question 7: What is 'visual expression'? In fact, I think it is a kind of beauty in design. When people see your design, they will have a sense of beauty or attractiveness or some kind of visual impact. In short, you must have a certain unique aesthetic ability and design ability.
Question 8: What does the visual effect of wedding photos mean? Visual effect means that the wedding photos taken have high visual impact or color impact, making the photos more distinctive and different from other ordinary photos. Make the difference!