Basic knowledge of photography-What are the classifications of photography (2)

Photo photography has always been an important form of portrait photography with its beautiful picture language and beautiful design connotation. /kloc-In the second half of the 0/9th century, British photographer Landa took photos of two life paths, which were predicted as "a new era of photography is coming". When photography was still despised at that time, this work was highly praised by Queen Victoria for its inspiring theme and oil painting composition. It can be said that Lanzhou University has contributed a lot to the development of photography. Since then, photo photography has gradually become an important genre of photography.

Commercial photography

Commercial photography, as its name implies, refers to photography activities for commercial purposes. In a narrow sense, it is commercial photography, and in a broad sense, it is a type of photography that publishes goods or writes stories. This type is an extremely important one in current photography activities. This kind of photography exists for commercial interests, and shooting according to the requirements of enterprises is relatively restrictive.

Ink photography

Like traditional ink painting, ink photography works appearing on the market now can be divided into landscapes, flowers and birds, and artistic conception according to the subject matter, which corresponds to landscape painting and flower-and-bird painting in Chinese painting; According to the technique and artistic conception, it can be divided into abstract and concrete, which corresponds to the freehand brushwork and meticulous brushwork of Chinese painting.

Although it is inevitable to use Photoshop and other software to post-process the ink-wash photos, this does not mean that the original photos can be distorted at will. Good ink and wash photography works need to modify the original photos as little as possible, which tests the photographer's composition and ability to capture light and shadow.

Holography

Holography refers to a new photography technology, which records all the information of the amplitude and phase of the reflected wave of the object being photographed. Ordinary photography records the light intensity distribution on the surface of the object, but it can't record the phase information of the reflected light of the object, so it loses its three-dimensional sense. Holography uses laser as the illumination source, and divides the light emitted by the light source into two beams, one of which is directly directed at the photosensitive plate, and the other is reflected by the subject and then directed at the photosensitive plate.

When the human eye directly looks at this photosensitive film, it can only see interference fringes like fingerprints, but if it is irradiated by laser, the human eye can see the three-dimensional image of the original object through the film. Even if only a small part of the holographic image remains, it can still reproduce the whole scene. Holography can be applied to nondestructive testing, ultrasonic holography, holographic microscope, holographic storage, holographic film and television and many other aspects in industry.