北京航天泰坦福利待遇:详细解释pixel

Pixel is formed by blending pix and element, and pix is a variant of pics, and pics is the plural form of pic, which is shortened from picture. So two word-formation methods are involed here.

Merriam-Webster Dictionary:
Main Entry:pix?l
Pronunciation:*pik-s*l, -*sel
Function:noun
Etymology:pix + element
Date:1969

1 : any of the small discrete elements that together constitute an image (as on a television or computer screen)
2 : any of the detecting elements of a charge-coupled device used as an optical sensor

Many people think pixel is a new word. In fact, it is nearly forty years old now.

OR:
The intensity of each pixel is variable; in color systems, each pixel has typically three or four dimensions of ... A pixel is generally thought of as the smallest complete sample of an image. The definition is highly context sensitive. ...

pixel
king金软件

n.
（显示器或电视机图象的）象素
像素

[英汉] 现代英汉综合大辞典
(=picture element)象素...
[英汉] 现代英汉词典
〈电视〉像素 (picture element)...
[五国语言]信息学专业词典
[英语]picture element, pixel...
[五国语言]电子学专业词典
[英语]pel, picture element, pixel...
[五国语言]地理学专业词典
[英语]pixel, picture element...
[英汉] 英汉计算机词汇
象素，象元，图素[元]...
[英汉] 英汉电信大词典
n.像素...
[英汉] 英汉地质大词典
n.象元,图象要素...
[英汉] 英汉广播大词典
n.象素...
[英汉] 英汉航空大词典
n.象素...
[英汉] 英汉化学大词典
n.象点...
[英汉] 英汉计算机大词典
n.像素;n.象素,图素...
[英汉] 英汉农牧林大词典
n.象元,图象要素...
[英汉] 新英汉石油技术词典
象素[英汉] 英汉水利大词典
n.象元,象素,象点...
[英汉] 英汉石油大词典
n.象元...
[英汉] 英汉医学大词典
n.象素...
[英汉] [名词委审定]英汉测绘学名词(定义版,2002)
像元...
[英汉] [名词委审定]英汉计算机名词(第二版,2002)
像素...
[英汉] [名词委审定]英汉农学名词(1993)
象元...
[英汉] [名词委审定]英汉生物物理学名词(1990)
[图]象素... ，象元...

pixel [简明英汉词典]
[5piksEl]
n.（显示器或电视机图象的）象素
像素

pixel [简明英汉词典]
[5piksEl]
n.（显示器或电视机图象的）象素
像素

pixel
n.
1、（显示器或电视机图象的）象素
2、像素

这个单词的详细解释为：“像素”（Pixel） 是由 Picture 和 Element这两个字母所组成的，是用来计算数码影像的一种单位，如同摄影的相片一样，数码影像也具有连续性的浓淡阶调，我们若把影像放大数倍，会发现这些连续色调其实是由许多色彩相近的小方点所组成，这些小方点就是构成影像的最小单位“像素”（Pixel）。 显示区域（比如监视器，打印机）的图形元素。每一个pixel是可以单独访问的。

（1）有关pixel的第一篇英文解释：
Short for Picture Element, a pixel is a single point in a graphic image. Graphics monitors display pictures by dividing the display screen into thousands (or millions) of pixels, arranged in rows and columns. The pixels are so close together that they appear connected.
The number of bits used to represent each pixel determines how many colors or shades of gray can be displayed. For example, in 8-bit color mode, the color monitor uses 8 bits for each pixel, making it possible to display 2 to the 8th power (256) different colors or shades of gray.
On color monitors, each pixel is actually composed of three dots -- a red, a blue, and a green one. Ideally, the three dots should all converge at the same point, but all monitors have some convergence error that can make color pixels appear fuzzy.
The quality of a display system largely depends on its resolution, how many pixels it can display, and how many bits are used to represent each pixel. VGA systems display 640 by 480, or about 300,000 pixels. In contrast, SVGA systems display 800 by 600, or 480,000 pixels. True Color systems use 24 bits per pixel, allowing them to display more than 16 million different colors.

（2）有关pixel的第二篇英文解释：
The pixel (a word invented from "picture element") is the basic unit of programmable color on a computer display or in a computer image. Think of it as a logical - rather than a physical - unit. The physical size of a pixel depends on how you've set the resolution for the display screen. If you've set the display to its maximum resolution, the physical size of a pixel will equal the physical size of the dot pitch (let's just call it the dot size) of the display. If, however, you've set the resolution to something less than the maximum resolution, a pixel will be larger than the physical size of the screen's dot (that is, a pixel will use more than one dot).
The specific color that a pixel describes is some blend of three components of the color spectrum - RGB. Up to three bytes of data are allocated for specifying a pixel's color, one byte for each major color component. A true color or 24-bit color system uses all three bytes. However, many color display systems use only one byte (limiting the display to 256 different colors).
A bitmap is a file that indicates a color for each pixel along the horizontal axis or row (called the x coordinate) and a color for each pixel along the vertical axis (called the y coordinate). A Graphics Interchange Format file, for example, contains a bitmap of an image (along with other data).
Screen image sharpness is sometimes expressed as dpi (dots per inch). (In this usage, the term dot means pixel, not dot as in dot pitch.) Dots per inch is determined by both the physical screen size and the resolution setting. A given image will have lower resolution - fewer dots per inch - on a larger screen as the same data is spread out over a larger physical area. On the same size screen, the image will have lower resolution if the resolution setting is made lower - resetting from 800 by 600 pixels per horizontal and vertical line to 640 by 480 means fewer dots per inch on the screen and an image that is less sharp. (On the other hand, individual image elements such as text will be larger in size.)

（3）pixel 和分辨率息息相关，下面是对二者的解释：
分辨率就是计算机屏幕上显示的像素的个数，在Windows95环境下，屏幕分辨率通常为640×480，即能显示640×480个象素，现在的计算机一般都支持800×600、1024×768，甚至1600×1200的分辨率。
当你的电脑的分辨率设置得很高时，在同样大小的屏幕上就显示了更多的象素，由于我们的显示器大小是不会变的，所以每个象素都变小了，整个图形也随着变小，但是同一屏幕上显示的内容却大大增多了。分辨率是800×600的屏幕，它虽然字体变得比较小，但屏幕上可以显示更多的东西：

（4）参考资料：
http://www.webopedia.com/TERM/p/pixel.html

http://whatis.techtarget.com/definition/0,,sid9_gci212793,00.html

http://www.cams.cma.gov.cn/cams_xxyd/jichu/yuanjian-fenbian.htm