章节大纲

  • In this lesson, you'll use the image, "13_OakTree.jpg." Before continuing, click on the Resources tab and download the image.
    ::在此课中, 您将使用图像“ 13_ OakTree. jpg ” 。 在继续之前, 请点击资源标签并下载图像 。


    Black and white images can have a classic look. In addition, they are longer-lasting than color images, because they don’t fade as quickly after printing. You can turn any image into a black and white image by desaturating it. Desaturate means removing the colors, leaving them in shades of black, gray, and white.
    ::黑白图像可以有一个经典的外观。 此外,它们比彩色图像长,因为它们不会在打印后迅速消失。 您可以通过去饱和将任何图像转换成黑白图像。 不饱和意味着去掉颜色,留下黑色、灰色和白色的阴影。

    Open the image “Credit2_09_OakTree.jpg” in Pixlr Editor.  Click on the Adjustment m enu, and choose Desaturate .
    ::在 Pixlr 编辑器中打开图像“ Credit2_09_OakTree.jpg ” 。 点击调整菜单, 并选择不饱和 。

    Oak Tree


    After adjusting with Desaturate the image may look a little flat.
    ::与不饱和度调整后, 图像可能看起来有点平坦 。

    edited image


    You can give more of an appearance of depth by adjusting the brightness and contrast with  Brightness & Contrast ,  Levels , or  Curves . Here is the image after adjusting with   Brightness & Contrast .
    ::您可以通过调整亮度和与亮度和对比度、级别或曲线的对比度来给出更多深度的外观。 这是与亮度和对比度调整后的图像 。

    edited image

    Save and share the Desaturate -adjusted image with your teacher, and be prepared to discuss how it shows what you’ve learned.
    ::并准备讨论如何展示你学到的东西。


    RECORD YOUR FINDINGS
    ::记录你的调查结果

    • What are two reasons people might want black and white images?
      ::人们为什么想要黑白图像?
    • What does the process of desaturating do to color images?
      ::淡饱和过程对彩色图像有什么作用 ?
    • How can you give the desaturated image more of an appearance of depth?
      ::如何让饱和的图像 更像深度的外观?