問題就在這,真是因為是黑和白和灰會是這樣的沒有數值變化, 而其餘色的數值是會變化, 而成為不同的顏色灰。。。為了證明我的觀點正確,你可以用PS or paint做個簡單實驗, 你把任何一個畫變成黑白的圖片,再用吸管去鑑定,你就會看見沒有RGB而只有%的變化。。因為RGB是無法做到純灰, 我說黑和白不是色就是這道理, 0,0,0 代表沒有任何基本色,也就是無色, 255,255,255,也無限合(只是實際運用數據要個可用數), 也是無色, 任何中間的RGB能產生數據的灰都不是純灰
所以當你把圖片變成黑白圖片的時候,自然就不會有RGB的數值了
你是色彩学的基础知识没学好,而且实际运用更是少,你根本不理解no light and full intensity的在色彩学里的真正含义,哈哈,没文化不可怕,可怕的是有点文化装学者,什么都敢说啊。笑掉大牙咧!俺没功夫教育你,下面的不是给你看的,你继续瞎掰。
The RGB color model is additive in the sense that the three light beams are added together, and their light spectra add, wavelength for wavelength, to make the final color's spectrum.[1][2]
Zero intensity for each component gives the darkest color (no light, considered the black), and full intensity of each gives a white; the quality of this white depends on the nature of the primary light sources, but if they are properly balanced, the result is a neutral white matching the system's white point. When the intensities for all the components are the same, the result is a shade of gray, darker or lighter depending on the intensity. When the intensities are different, the result is a colorized hue, more or less saturated depending on the difference of the strongest and weakest of the intensities of the primary colors employed.
http://en.wikipedia.org/wiki/RGB_color_model
The RGB color model is additive in the sense that the three light beams are added together, and their light spectra add, wavelength for wavelength, to make the final color's spectrum.[1][2]
Zero intensity for each component gives the darkest color (no light, considered the black), and full intensity of each gives a white; the quality of this white depends on the nature of the primary light sources, but if they are properly balanced, the result is a neutral white matching the system's white point. When the intensities for all the components are the same, the result is a shade of gray, darker or lighter depending on the intensity. When the intensities are different, the result is a colorized hue, more or less saturated depending on the difference of the strongest and weakest of the intensities of the primary colors employed.
http://en.wikipedia.org/wiki/RGB_color_model
谢谢,这是现代计算机图形图像学的基本常识,也是模式识别和更进一步的机器人视觉的基础之一。
来,考考大家的眼力
下面这幅画里,方块A和方块B的颜色,是完全一样的吗?
OK,这么问,答案当然是YES,不过看起来是不是深浅差别很大,有次可见,对比的重要性。。。。如果不信,最简单的测试办法是用PAINT软件打开,然后用吸管,各吸一下,然后看颜色的 RGB值,两者基本是完全一致的