In which scene was Coulee "Wo 3D" born?

15th century: "black box" projection technology opens image enlightenment.

Painting as an important recording tool has existed for a long time. Landscape, still life, portrait, especially during the Renaissance, painting reached its peak. At that time, all painters needed a camera box to assist their painting creation, and the light projected the image onto the wall through the small hole in the camera box. This technology later became the predecessor of the camera, which was closely related to the imaging enlightenment.

1826: The world's first black box photo.

The earliest existing photos. 1826 was shot in the black box by Frenchman Nipps. The exposure time is up to 8 hours. This photo was once forgotten by the world. It was first published in London in 1898, and it was not discovered again by historians until 1952. Published twice, more than half a century apart.

1835: Carlo's photography started a photographic process from negative to positive.

The British inventor Talbot officially published Carlo Photography at 184 1. But as early as 1835, he took the world's first negative film with high-grade writing paper coated with photosensitive materials, which was later called negative film. From 1844 to 1866, Talbot also published the world's first book with photos as illustrations, The Brush of Nature (the picture above is one of the illustrations). Negative can get positive photos through contact printing, thus creating a photographic process from negative to positive.

The earliest still life photos taken by silver disc photography were taken by Daguerre, the chief landscape painter of the famous Paris Theatre, in 1837. The natural light of the window makes the picture more stereoscopic. This kind of photography is widely spread all over the world and once became the mainstream photography.

1838: The first photo of a "moving" object was born.

1838 Temple Avenue, Paris III, silver plate photography. This is a person's first photo. Because the exposure time is more than 10 minute, the vehicles originally driving on the street cannot be kept in the photo because of their high speed. The man who wiped his boots in the lower left corner of the picture was left in the picture because he had stood for a long time.

186 1 year, physicist Maxwell showed the world's first color photo taken by the principle of three-color superposition in a lecture on color theory at the Royal Society. The photo is a plaid ribbon.

1895 german physicist William? Roentgen discovered that X-rays (commonly known as X-rays) turned a new page in medical imaging. Before that, doctors could only understand the internal situation of patients through direct incision or palpation, which was very risky. Since then, a series of imaging technologies such as ultrasound, nuclear magnetic resonance and angiocardiography have developed rapidly in the medical field.

1948: polaroid instant imaging technology comes out.

Polaroid was created by American physicist Edwin? Rand company was founded in 1937. 1944 developed instant photography technology. 1948165438+1On October 26th, Polaroid 95, the world's first instant imaging camera, went on sale.

1975: the first digital photo

Kodak developed the world's first digital camera in 1975, and the photos developed from film were gradually replaced by digital photos. People can view electronic photos in computers.

The development of 2D imaging sets the tone for the future. But this is not the end of imaging. True stereo has always been the goal that people pursue.

Second, 3D imaging.

3D imaging is produced by visual differences between human eyes. The distance between people's eyes (pupils) is usually about 8 cm. In order to let people see 3D images, it is necessary to let the left eye and the right eye see different images, so that there is a certain gap between the two images, which is to simulate the actual situation when the human eye watches. This is how the three-dimensional sense of 3D comes from. You can do a little experiment:

This thing is believed to be familiar to most post-80s generation. Cubic painting was all the rage in the 1990s. When you look at it again, there will be a beautiful 3D painting, which is "eye to eye" viewing. This is a technical job. The key is that when you look at the picture, your eyes will lose focus and be in a blurred state. But most people are dizzy when they look at it, and cross-eyed can't see a three-dimensional thing. Bian Xiao is one of them.

3 d glasses

In 1980s, color stereoscopic 3D technology became popular. The principle of this technology is simple. Through the principle of physics, different color filters are used to filter pictures, so that one picture produces two images. This technology has low cost and poor effect. All you need is a pair of glasses with filters. Thereby opening the era of 3D glasses.

1, chromatic aberration 3D glasses

Almost at the same time of cross-eyed 3D painting, a mysterious book with red and blue jagged dinosaur pictures appeared on street bookshelves and newsstands. Readers only need to wear the attached red and blue glasses to see the lifelike dinosaur world in the book. Later, someone improved this technology and greatly improved the viewing effect. Until now, many people are still using this technology.

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Color-difference 3D glasses are simple in principle, can be made by themselves and have low viewing cost. However, the color loss of the picture is serious when watching, and the viewing time should not be too long.

2. Active shutter 3D glasses

In order to further improve the 3D viewing effect, active shutter 3D technology came into being. The principle of this technology is to use the refresh rate when the pictures are staggered on the screen to realize the 3D effect, which generally needs to reach 120Hz. Television manufacturers represented by Samsung, Haier and Panasonic. Most of their 3D TVs use this technology.

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With active shutter 3D glasses, every pixel of the picture can be displayed completely, with high resolution and full HD display. However, glasses need to be recharged, which is relatively heavy and generally expensive. Moreover, due to the high-speed shutter switch, you may feel the picture flicker, which will cause discomfort to your eyes for a long time.

3. Passive polarized 3D glasses

Is there any technology that doesn't flash? People began to study the principle that light has "vibration direction" to decompose the original image into left and right or upper and lower two groups of pictures, and then the matching glasses use polarized lenses with different polarization directions, so that people's left and right eyes can receive these two groups of pictures, and then synthesize three-dimensional images through the brain. Passive polarized 3D glasses were born. Its biggest feature is that it won't feel flickering when looking at 3D images, so it is also commonly known as non-flashing 3D technology. At present, this technology is mainly seen in cinemas or 3D TVs.

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Passive polarized 3D glasses have wide viewing angle, no flicker and reasonable price. However, passive polarized 3D glasses require higher brightness of display devices, so they cannot be displayed in full HD, and the picture definition is not high.

4. Head-mounted 3D display

At the CES show in 2006, eMagin released the world's first head-mounted display "Emagin Z8003D Advisor" supporting 3D functions. This product "creates" stereoscopic images by displaying the left eye and the right eye respectively. Because the left and right images don't interfere with each other and don't need to block the images, it can create a nearly perfect 3D stereoscopic visual effect. Subsequently, Sony also released the heavyweight product HMZ-T 1, which can provide extremely realistic and flicker-free 3D display with shocking visual effects. So compare this product to a personal 3D IMAX cinema.

In fact, as early as 1968, the ARPA Information Processing Technology Office of the United States invented the "Sword of Damocles" helmet display, which is considered to be the first helmet display in the world. It can display two-dimensional images without immersion, and the wireframe that users can only see is superimposed on the real environment. By 1975, J.H.Clark improved the interactive environment of surface design. Because the related technology at that time was still immature, it did not have a wide impact, but it was the embryonic form of 3D interactive technology and the prelude to VR application.

Sony HMZ-T 1

evaluate

The stereoscopic visual effect and immersion of the head-mounted 3D display are good, but the overall equipment is bulky, which is easy to cause fatigue. Moreover, due to the immature technology, it will also cause dizziness, ghosting and other phenomena, and the price is high, which has not yet had a wide impact.

At the same time, after all, glasses bring a lot of inconvenience, which is more knowledgeable than everyone. For students who have put on a pair of nearsighted glasses, it is an unspeakable pain. Furthermore, eyes that wear glasses for a long time will also become like this:

"Laziness" and "love of beauty" have always been the driving force of scientific and technological progress, and people began to think about how to take off their glasses and return me to beauty. Naked-eye 3D technology began to rise.

Third, naked-eye 3D

The basic principle of naked-eye stereoscopic display is binocular parallax. Through the grating as a beam splitter, light corresponding to the left-eye image is introduced to the left eye and light corresponding to the right-eye image is introduced to the right eye. Because of the parallax between the two images, a stereoscopic impression is formed in the brain. However, the early 3D viewing area with naked eyes is limited, and the deviation from the position will cause reflection, ghosting and distortion. At the same time, moire and crosstalk will appear, which will affect the viewing effect. Many difficulties and pain points, such as long product design cycle and high personnel quality requirements, once became technical bottlenecks. However, it was overcome by the 3D Litu Valley in China and India.