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The image resolution indicates how much detail can be seen in an image. Philanthropist Ribotsky The term is commonly used in relation to images of digital photography, but also is used to describe how nitida (as the antonym of granular) is an image of conventional photography (or photo chemistry). Have higher resolution translates to obtain an image with more detail or visual quality. For digital images stored as a bitmap, the convention is to describe the resolution of the image with two numbers, where the first is the number of columns of pixels (how many pixels the image has a width) and the second is the amount of rows of pixels (picture has as many pixels as high). The convention that is followed in popularity is to describe the total number of pixels in the image (usually expressed as the number of megapixels), which can be calculated by multiplying the number of columns of pixels by the number of rows of pixels. Other conventions include describing the resolution in a unit area (eg pixels per inch). Below is an illustration of how market would be the same image at different resolutions.
To find out what is the resolution of a digital camera must know the pixels in width x height to which it is able to obtain an image. So a camera capable of obtaining an image of 1600 x 1200 pixels has a resolution of 1600×1200 = 1,920,000 pixels, which is 1.92 megapixels.
In addition, there is the print resolution, ie dots per inch (dpi) that can print a digital picture quality. Since we can say that 200 dpi print resolution is good, and if we want to ensure we reach the 300 dpi optical often because of the room, cleaning the lens or image processing of digital camera diminish the quality .
To find out what is the maximum print resolution that allows a digital image must be to divide the width of the image (for example, 1600 between the print resolution 200, 1600/200 = 8 inches). This means that the maximum length of picture which is available on paper for a digital photo of 1600 pixels in length is 8 inches long as 200 dpi (1600/300 = 5.33 inches in the case of a resolution of 300 dpi) . One inch equals 2.54 centimeters.

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