What is 144 240 360 480 720 1080p ??

Resolution can either be given as two numbers e.g. 640x480 or a single number like 1080.

Two numbers means the number of dots per line and then the number of lines. So 640x480 has 640 dots per line and 480 lines.

If resolution is given as a single number then it's the number of horizontal lines in the image.

e.g. 1080 has 1080 horizontal lines, normally with 1920 points on each line.

Single numbers are normally given together with an aspect ratio, that is the ratio between dots per line and number of lines.

If they don't give an aspect ratio assume 16:9 for widescreen (1080 * 16 / 9 = 1920) and 4:3 for non-widescreen (480 * 4 / 3 = 640).

p or i after the number means progressive or interlaced and only makes sense when talking about video not still images.

Progressive means the whole frame is sent every time.

Interlaced means that the first frame only the odd number lines are sent, the next frame only the even number frames are sent. This halves the data rate needed and due to the way the human eye works doesn't have a huge impact on image quality.

Obviously progressive is better if possible.

Converting camera mp (megapixels (millions of dots)) into a resolution is not simple. (Pixel = dot in an image)

When someone talks about a 1080 image they normally mean 1920x1080 dots or pixels.

1920 * 1080 = 2.07 million pixels.

But each of those 2 million pixels has a red value, a green value and a blue value.

When people talk about file resolutions or display resolutions they are talking about these sets of 3 values.

When they give camera resolutions in megapixels each color needs a different sensor and so they count each color separately. So to generate a color image with 2 million pixels you would need a 6MP camera.

In reality things get even more complex because firstly you need red, green and blue values the same location in the image but on the camera sensor they have to be next to each other not on top of each other. And then the cameras don't actually group the sensors into sets of 3. Typically a 5MP camera will have 2.5 million green pixels, 1.25 million red and 1.25 million blue. They then apply some smoothing to calculate the values you would expect if the sensors were all lined up with each other and use that to produce the image.

Depending on how this smoothing and estimating is done the software could in theory generate an image with anything from 5 million to 1.25 million 3-value pixels, generally you'll get one for each green sensor or 2.5 million for a 5MP sensor.

So in theory a 5MP sensor could just generate a 1080 image however the sensors tend to be square or 4:3 aspect ratio. In a cell phone you want to be able to take video in either orientation, unless you want to change the maximum possible resolution depending on which way is up that means you need a square sensor. That in turn means that no matter what you do a lot of the sensor isn't getting used which drops your maximum resolution.

So as a very rough estimate calculate the number of pixels in an image and multiply by 2 to get the minimum MP needed for a camera to generate that image but depending on the use you may need a lot more.

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RE:

What is 144 240 360 480 720 1080p ??

don't know anything about this. Actually what are is called resolution? What are the resolution in 144 360 480 720 1080p? Is 720p and 720i is same ? Why are they different ?

I have a camera and it's resolution is 720x480 what it's means ? How much quality is it? I mean is it 480p...

480 720 1080

The "i" stands for interlaced and the "P" for progressive. Generally speaking progressive is always better then interalced for image quality. Interlaced is especially bad for fast moving camera movement but progressive just looks better so I would always want a camera with that. Basically interlaced presents half the picture at one time with the second half appearing a short time later. Progressive presents the entire image at once with no delays. This requires more image data to create then interlaced but because of this it also looks better then interlaced most of the time.

The MP, mega pixel, count does not direct relately to the final resolution of the camera. You only need around 2.1 MP for 1080 video and 8.2 MP for 4k. Video cameras with more then 2.1 MP for 1080 video are using the rest of the pixels for photography not for video. The software in the camera will determine what the final resolution of the image is when it is output as video though. So you could have a 5 MP camera but the software is only getting you 480p.

If you want HD quality you will need to select either 720P, 1080i, or 1080p. If the camera does not have that capability you will need to get one that does. I do not believe there is such a thing as 720i, never have seen it anyway.

Resolution is the vertical pixels and the horizontal pixels.

As for quality pixels ie 360 480 720 etc. that is the horizontal. The higher the number , the better the qualitie

And you cant match Mega pixels with a resolution, the photo it takes is the resolution.

the lower the number, the lower the resolution. Your camera is has 480p resolution (always look at the number after the x) a 480p camera is all right (depending on how much you paid for it) but it's not HD. HD is 720p or higher. iPhones have pretty good cameras so it might be 720p.

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