Traditional Culture Encyclopedia - Photography major - What determines the sharpness of photos? Pixel? The higher the pixel, the clearer the photo.
What determines the sharpness of photos? Pixel? The higher the pixel, the clearer the photo.
In most digital cameras, you can choose different resolutions to take pictures. The higher the pixels of a digital camera, the higher the resolution of the photo. Resolution is directly related to the pixels of the image.
A picture with a resolution of 640 x 480 has 307,200 pixels, which is what we often call 300,000 pixels, while a picture with a resolution of 1600 x 1200 has 2 million pixels. In this way, we know that the resolution represents the point unit of the length and width of the picture.
The highest resolution of a digital camera is the area where it can take the largest picture. Technically, a digital camera can produce the most pictures per inch of image, usually in units of dpi (Dot per inch in English). The larger the resolution, the larger the area of the picture.
Extended data
Resolution:
Resolution determines the fineness of bitmap image details.
Generally speaking, the higher the resolution of an image, the more pixels it contains, the clearer the image and the better the print quality. At the same time, it will also increase the storage space occupied by files.
Resolution is directly related to the pixels of the image. Let's calculate that a picture with a resolution of 640 x 480 has a resolution of 307,200 pixels, which is what we often call 300,000 pixels, while a picture with a resolution of 1600 x 1200 has a resolution of 2 million pixels.
In this way, we know that the two figures of resolution represent the number of points in the length and width of the picture. The aspect ratio of digital pictures is usually 4: 3. Resolution is one of the important parameters of LCD and traditional CRT display.
The resolution supported by the traditional CRT display is more flexible, while the pixel spacing of LCD is fixed, so it does not support as many display modes as CRT. The best resolution of LCD, also called the maximum resolution, can only display the best image at this resolution.
Pixel:
Pixel is the most important index to measure a digital camera. Pixel refers to the resolution of a digital camera.
Depending on the number of photosensitive elements on the photoelectric sensor in the camera, one photosensitive element corresponds to one pixel. Therefore, the larger the pixel, the more photosensitive elements, and the greater the corresponding cost. The image quality of a digital camera is partly determined by pixels. If it is larger than a certain size, it is meaningless to simply compare it with pixels.
The pixel of mainstream SLR digital cameras is about1000000, but 5 million pixels is enough for ordinary photography and home use, because the resolution of the display we use is limited, generally from 1024×768 to 1920× 1200. If a picture with too many pixels is displayed at this resolution, the picture will be compressed to the size of the current screen.
The imaging quality mainly depends on the size and quality of camera lens and photosensitive element. The larger the pixel, the higher the resolution of the photo and the larger the printable size. But the early digital cameras were all below 6.5438+0 million pixels. Since the second half of 1999, 2-megapixel products have gradually become the mainstream of the market. (Mobile phones are generally 2 million pixels, and ordinary digital cameras are generally above 3 million pixels. )
Baidu Encyclopedia: Image Pixels
Baidu encyclopedia: pixels
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