窄带天文拍摄哈勃色photoshop合成译文.docVIP

Although?this?tutorial?uses?PhotoShop,?this?technique?will?work?with?any?image?processor?that?can?create?an?RGB?image?using?a?separate?gray?scale?image?for?each?color?channel虽然这些示范是photoshop的，但凡是那些可由单独的灰度单色图像来合成RGB彩色图像的图像处理软件均可用。This?tutorial?shows?specific?color?adjustments,?using?PhotoShops?Selective?Color?tool.?The?reader?is?encouraged?to?experiment?with?all?adjustment?combinations.?With?a?little?practice?it?will?become?easy?to?take?the?color?in?any?desired?direction.?Also,?dont?forget?to?try?the?Hue/Saturation?tool.这个范例显示了用photoshop里的工具来对特定的颜色进行调整。当然读者应该试着体验一下用各种手段来调整颜色，只需稍加练习，很容易获得期望的各种颜色，同时也别忘记试着使用色调/色饱和度的那些调整工具。图一Image?1?was?created?by?mapping?the?SII,?Ha?and?OIII?data?respectively?to?the?R,?G?and?B?channels.?The?resulting?RGB?image?was?stretched?to?show?the?faint?detail?and?gives?a?wonderful?display?of?the?extent?of?hydrogen,?in?the?area?of?NGC7830.图一是将SII，Hα，0III分别对应到R\G\B通道。得到的RGB影像深入地显现出了精彩的氢的暗弱细节，NGC7830天区。However,?due?to?its?dominance,?all?we?see?is?the?hydrogen.?By?manipulating?the?colors,?we?can?show?the?SII?and?OIII?areas.?This?creates?a?much?more?interesting?image?and?we?can?also?do?a?bit?of?science.??So?lets?get?to?it.然而，由于强势的氢的存在，我们看到的都是氢的表现。不过，通过对颜色的处理，我们能使SII和OIII区域也表现出来。这不但能获得有趣得多的图像，也能使我们的工作多少有点儿科研含量，我们接着往下来。 图2 Image 2 Fig. 1 Iimage 2 is what I generally call my Base Hubble Palette image. I usually manipulate the color of this image to produce other motifs, such a the popular gold and turquoise combination. This image is created by first stretching the SII, Ha and OIII images so their levels from dark to bright are similar... as shown in the above histograms in Fig 1. Now create an RGB image with SII mapped to red, Ha to green and OIII to the blue channel and you should get something similar to Image 2. While this image does not represent the correct balance of sulfur, hydrogen and oxygen, we can plainly pick out the presence of the three elements 图2我通常称为基本哈勃色版影像。可以调整这幅影像的颜色以产生其它创意的图像，如，流行金和宝石蓝组合。如同上面FIG1直方图里显示的那样，通过拉伸