So if you have camera A with 0.5 LP/pix and camera B with 0.4 LP/pix you would say that A is better than B. If you only express the resolution in LP/pix, you do not take into account that the sampling itself will reduce the resolution. This way one can easily compare two camera and see how well they make use of the amount of pixel they have. So if one camera can resolve 0.4 LP/pix it reaches 80% of its theoretical maximum resolution. As a line pair is always a black and a white line, the maximum resolution one can achieve is 1/2 LP/pix. In this case we do not have a physical extent in the unit, we just describe how many line pairs can be resolved by one pixel. One very common unit is line pairs per pixel or cycles per pixel. Or have you ever seen the sensor in your mobile phone?ДЄs we have shown that LP/mm is not a suitable unit for the resolution a digital camera can capture, a different unit is needed. But in this case you need to know the exact dimension of the sensor that is used in the device which is sometimes hard to find out and most of the times impossible if you can not open the device. You can use LP/mm to express the resolution of a lens. So you can not use this unit to express the resolution in a digital image. The problem in the digital world? Digital values have no physical extent, only their representations on a screen or in a print. If you have 100 LP/mm resolution of a lens, this means that one find 100 black and 100 white lines within 1 mm projected on the film (or sensor). One line pair is a black line and a white line next to each other in the same orientation and with the same width. This unit expresses the amount of line pairs you can find within one millimeter in the sensor/film plane. In the analog times, the resolution of film and/or lens was expressed in line pairs per millimeter (LP/mm). It is not uncommon, that a good 10 megapixel camera has the same resolution compared to a 12 or 14 megapixel camera. So the amount of pixel is somewhat related to the resolution, but does not define it. But this does not mean, that each pixel really holds a useful information about the image content. A camera with 10 megapixel has ten million pixel that will sample the image that the lens has projected on the sensor. вЂњThis camera has 10 megapixel resolutionвЂќ is something you read here and there and often in ads, but from the technical perceptive this is wrong. But there are different ways to express the resolution of a digital camera which are sometimes confusing. One very important parameter for testing a digital imaging device is the resolution*.

Mega pixels means