The highest resolution

The area where the digital camera can take the largest picture is the highest resolution of this digital camera, usually in pixels. In the same size photo (bitmap), the larger the resolution, the larger the area of ​​the picture and the larger the file (capacity). In general, the resolution is expressed as the number of pixels in each direction, such as 640×480 or the like.

The more data the image contains, the larger the length of the graphics file and the more detail that can be represented. However, larger files also require more computer resources, more memory, more hard disk space, and so on. On the other hand, if the image contains insufficient data (graphical resolution is low), it will appear quite rough, especially when the image is magnified to a larger size. So during image creation, we must determine the correct resolution based on the ultimate use of the image. The trick here is to first ensure that the image contains enough data to satisfy the final output. At the same time, it must also be appropriate, taking up as few computer resources as possible.

There is a direct relationship between the resolution and the pixels of the image. Let's calculate it. A picture with a resolution of 640×480 pixels has a resolution of 307,200 pixels, which is what we often say 30 Megapixel, and a picture with a resolution of 1600×1200, its pixel is 2 million. In this way, we know that the two digits of the resolution represent the unit of the number of dots that the picture occupies in length and width. The aspect ratio of a digital image is usually 4:3.

Attachment: Resolution is a parameter used to measure the amount of data in the bitmap image. Usually expressed as ppi (pixels per inch) and dpi (points per inch). Ppi and dpi (dots per inch) are often mixed. From a technical point of view, "pixels" (P) only exist in the field of computer display, and "dot" (d) only appears in the field of printing or printing.