How do pixels distinguish grades? Is there a difference between pixels and dimensions?

Oh landlord Generally speaking, 3 million pixels can meet the needs of the human eye If the requirements for ** are high, then the higher the pixel is the better After you take a good picture of the photo, see how much memory it occupies The more memory it takes, the clearer it is, so ** After magnification, it is still very clear Just like** The song is divided into ordinary version and high-quality version.

1. The pixel and size definitions of ** are different.

A "pixel" is the smallest unit in an image represented by a sequence of numbers.

"Size" refers to the length of the size, and the specific unit represents the number of length and width.

2. The pixels and sizes of ** have different meanings.

"Pixel" refers to the small squares of an image, the more pixels** the larger the size.

Size "has a fixed value in **, 1 inch =, such as: 5 inches is ** length; 12 inches is the first long.

3. The pixels and dimensions of ** are different.

The unit of "pixel" is px. When a size is in pixels, you need to specify a fixed resolution to convert the size to and from the actual size in reality.

The size of "** is measured in inches, usually x inches refers to the length of inches on the long side.

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Analysis: Pixels are the most important metric to measure a digital camera. Pixels refer to the resolution of a digital camera.

It is determined by the number of photosensitive elements on the Nianhui photoelectric sensor in the camera, and a photosensitive element corresponds to a pixel. So the larger the pixels, the more photosensitive elements there are, and the higher the corresponding cost.

The image quality of a digital camera is determined by pixels, the larger the pixels, the greater the resolution, and the larger the print size without reducing the print quality. Early digital cameras were less than 1 million pixels. Since the second half of 1999, 2 million pixel products have gradually become the mainstream of the market.

At present, the development trend of digital cameras refers to the stool, and the pixel is like the CPU frequency of the PC, and there is more and more momentum.

In fact, from the perspective of market classification, for popular products, considering the factor of cost performance, the bigger the pixel is not the better. After all, the 2 million pixel product has been able to meet most of the applications of ordinary consumers. Therefore, while most manufacturers pursue high pixels in high-end digital cameras, the largest output is still for universal megapixel products.

Professional-grade digital cameras, with more than 100 million pixels. The 3 million pixel level products will soon become the mainstream of the consumer market with the progress of CCD (imaging chip) manufacturing technology and the further reduction of costs.

In addition, it is worth noting that current digital camera products are divided into CCD pixels and software-optimized pixels in terms of pixel nominal, and the latter is much higher than the former. For example, a brand of digital cameras that are currently popular has a CCD image of 2.3 million, and the pixels optimized by software can reach 3.3 million.

A pixel is a small square of an image, each of which has a clear position and assigned a color value, and the color and position of the small squares determine the image of the image. Pixels are the most basic concept in the printing industry and screen devices, and all displays start with pixels, and gradually understand what CSS pixels are.

Features: Pixels are actually made up of many dots; The larger the pixel, the larger the resolution and the larger the printable size; The number of pixels is fixed, and the number of pixels that make up an image does not change by enlarging or shrinking the image when the image is displayed.