resolution and colour depth

resolution

Pixel resolution

The term resolution is often used for a pixel count in digital imaging, even though American, Japanese, and international standards specify that it should not be so used, at least in the digital camera field. An image of N pixels high by M pixels wide can have any resolution less than N lines per picture height, or N TV lines. But when the pixel counts are referred to as resolution, the convention is to describe the pixel resolution with the set of two positive integer numbers, where the first number is the number of pixel columns (width) and the second is the number of pixel rows (height), for example as 7680 by 4320. Another popular convention is to cite resolution as the total number of pixels in the image, typically given as number of megapixels, which can be calculated by multiplying pixel columns by pixel rows and dividing by one million. Other conventions include describing pixels per length unit or pixels per area unit, such as pixels per inch or per square inch. None of these pixel resolutions are true resolutions, but they are widely referred to as such; they serve as upper bounds on image resolution..per inch or per square inch. None of these pixel resolutions are true resolutions, but they are widely referred to as such; they serve as upper bounds on image resolution.

effect of colour depth when resolution is changed

the effect on the colour depth changes when the resolution is changed. resolution is the x amount of pixels by x amount of pixels. the smaller the resolution the worse the colour depth would be . if the resolution was high and had 2000x1000 this means there would be 2000 rows of 1000 pixels this means the smaller the pixel is the more detailed the colour is if the picture was 3x6 this is 3 rows of 6 pixels this means there can be a maximum of only 18 colour this decrease the colour depth. in conclusion the effect of resolution is massive on the colour depth as the higher the resolution the better the colour resolution would be unlike the smaller the resolution the worse the colour resolution would be causing a lower range of colours on the file .

explain the need for metadata

metadata is important to be included in the file. The metadata contains information such as ; height of photo,width of photo and resolution.this is all very important to get the best detail you need to know every inch to get the photo to maximum clearness you need to take into consideration such as the height and the width because if stretched to big the photo does start to blur and vice versa if shrunk to much the colour depth will start to because leaving you with a shortage of colour range. Meatdata is also important as with this, this can show you the image file size and when sending images in email it could take a long time being able to shrink and then send it then open and enlarge it at the other end would save a lot of time and would be quicker to send as it is a smaller image file . without metadata none of this could be possible.