The simplest representation of an image has each pixel specified by three 8 bit (24 bits total) color values (ranging from 0-255) defining the amount of red, green, and blue respectively in each pixel. In the right proportions, red, green, and blue can be combined to form black, white, 254 shades of grey, and a vast array of colors (16,777,216 colors total). The following is a super-simple image definition (33 image in ascii PPM format- from upper left, black, medium red, full red, medium grey, medium green, full green, white, medium blue, full blue). It is also shown as an enlarged image (in the GIF format since the PPM format shown can not be displayed by most web browsers) where each pixel is replicated as a 5050 solid colored square.
This, however, is a very simple way of representing an image and takes a very large amount of disk space. Most image formats, therefore, are compressed to shrink the size of the image. Additionally, some image formats allow for a much smaller range of colors (example: GIF is an 8 bit format and allows for only 256 different colors to be present in any image). Image formats such as GIF also, generally, do not directly specify colors in the manner shown above. Instead, each pixel is represented by a single number (for 8 bit images, a value from 0-255) which is an index into a color lookup table. Thus, each pixel only requires 8 bits (1/3 of the space) to represent it. The color lookup table then specifies colors in the full 24 bit true-color representation but it is so small relative to a normal sized image that the space it takes up is negligible. For a comparison of 24 bit vs 8 bit color, view the following page (in 24 bit PNG and 8 bit GIF formats respectively)
50 shades of grey full movie highly compressed
All of the above files basically represent the same image but there are significant differences. The GIF file has only 8 bit color and is therefore basically of lesser quality than the other images (of course it is also smaller and on an 8 bit color monitor would be just as good as a 24 bit color image). The PPM file is uncompressed and therefore very large and is of absolutely equivalent quality to the PNG image which is less than a fortieth of its size. The PostScript (.ps) file is unusual because it is not a raster image at all but rather a vector image (see the discussion on PostScript files). Finally, the JPEG image (.jpg) is the smallest image and is a full 24 bit color image but it is compressed using a lossy compression scheme. This means that, unlike the PPM, RGB and PNG files which are totally equivalent, the JPEG file is not. If you convert an image from RGB to JPEG and back to RGB, you will lose some level of quality in the transition to JPEG and can never get it back. How much loss there is depends on your choice of image compression level and on the nature of the image you are compressing.
That part is a little tough to picture, but the inset animation at the upper left helps. It shows the Moon and Earth highly compressed in space. At that same time of Jan. 6, the Sun is at about the 5:00 position, to the lower right. You can see that from the Earth the Moon would be dark, and from the Moon the Earth is lit.
As much as its a clich, Titanic is a go-to date movie for a reason. A little cheesy in places it may be, but theres no combination quite like a forbidden love across social classes and huge-scale tragedy amongst a terrible disaster. Starring a young Leo Di Caprio and Kate Winslet, as well as a delightfully villainous Billy Zane, James Camerons epic is a sure-fire ice-breaker (sorry).
Hello great information on your website but i am a still a little confused about rgb limited or full because every other forums i go to says if your hdtv supports full then go full since games are rgb full and i read that since ps4 and ps3 is like a pc because they have a graphics card and motherboard so it should be set to full only if hdtv supports it. Ok let me tell you about my tv I have a 2014 Sony hdtv which does have a dynamic range option either i can set to full or limited. Now my ps3 and ps4 i ONLY use these consoles for gaming. For bluray movies i have a seperate bluray player connected and for online movie sites like netflix or youtube i have a internet on my hdtv so i watch them thru my hdtv apps. Now my question is since i strictly use my consoles for gaming which setting is best for playing videogames? I would really appreciate your response! Thank you very much!
All this article told me is that I should watch movies and video content on a TV because computer monitors are not made to work in the same range that the source content is. Just like I should not (even though you can) use a TV for RGB full content.
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