Method for searching pictures

The following software can be used to search for maps:

Pinterest ( 1。 Pinterest is the best way to search for pictures. Generally, the original website and related information of the desired picture can be found soon. Click Create, click Create pin, and then click Upload Picture. Click Collection, click View Now, and click the search box in the lower right corner of the picture; There are many similar pictures on the right; Just download it yourself. Some pictures will be attached to the source website; Follow up and explore yourself!

2.yandex (used for Pinterest, which Pinterest can't find, but can basically find) is very simple to use, as shown in the figure.

Expand knowledge:

Camera, referred to as camera for short, is a kind of equipment that uses the principle of optical imaging to form images and records images with negatives. This is an optical instrument used for photography. In modern social life, there are many devices that can record images, all of which have the characteristics of cameras, such as medical imaging equipment and astronomical observation equipment.

After the light reflected by the shot scene is focused by the camera lens and the shutter that controls the exposure, the shot scene forms a latent image on the photosensitive material in the camera box, and forms a permanent image after being developed and fixed. This technology is called photography, which is divided into general photography and professional photography.

2065438+In September 2008, the Harmonized System Committee of the World Customs Organization classified UAVs as "flying cameras".

Camera development

The earliest camera structure was very simple, including only a black box, a lens and photosensitive materials. Modern cameras are complex, including lens, aperture, shutter, ranging, framing, photometry, film transmission, counting, self-timer, focusing, zooming and other systems. Modern camera is a complex product integrating optics, precision machinery, electronic technology and chemistry.

1550, Italian cardano put the lenticular lens in the original pinhole position, and the image effect is brighter and clearer than the black box.

1558, the Italian Barbaro added an aperture to the device in cardano, which greatly improved the imaging clarity. 1665, John Zhang, a German monk, designed and made a small portable single-lens reflex camera box, which could only be used for painting because there was no photosensitive material at that time.

1822, a Frenchman, Niepce, made the world's first photo on a photosensitive material, but the image was not clear and required eight hours of exposure. In 1826, he took a photo through a black box on the tin floor coated with photosensitive asphalt.

1839, Daguerre made the first practical silver camera, which consisted of two wooden cases. One wooden box is inserted into another to focus, and the lens cover is used as a shutter. Only by controlling the exposure time for 30 minutes can a clear image be taken.

184 1 year, optician Vogeland invented the first all-metal camera. The camera is equipped with the world's first photographic lens with the maximum phase aperture of 1: 3.4 designed by mathematical calculation.

1845, German von Martens invented the world's first 150 turning point. 1849, Davie-Blue Scott invented a stereo camera and a two-lens stereo observation mirror. 186 1 year, physicist Maxwell invented the world's first color photo.