倒色的月亮
(原标题: Moon in Inverted Colors)
2022-03-08
浏览次数: 17
这是哪个月亮？这是地球的月亮——但颜色是相反的。在这里，与明暗区域相对应的像素值被反向转换，或倒置，产生假色表示，让人想起黑白摄影底片。然而，这是一张倒置的彩色图像，其中月亮的柔和颜色是真实的，但在倒置之前被数字夸张了。通常来自第谷陨石坑的明亮光线支配着南部（底部）的特征，很容易从直径85公里的撞击地点发出深绿色的线条。通常是深色的月马看起来是浅色和银色的。这张照片是在英国英格兰滨海绍森德拍摄的。从历史上看，记录在照相底片上的天文图像是直接在倒色底片上检查的，因为它有助于眼睛挑选出微弱的细节。
查看原文解释
Which moon is this? It's Earth's moon -- but in inverted colors. Here, the pixel values corresponding to light and dark areas have been translated in reverse, or inverted, producing a false-color representation reminiscent of a black and white photographic negative. However, this is an inverted color image -- where the muted colors of the moon are real but digitally exaggerated before inversion. Normally bright rays from the large crater Tycho dominate the southern (bottom) features as easily followed dark green lines emanating from the 85-kilometer diameter impact site. Normally dark lunar mare appear light and silvery. The image was acquired in Southend-on-Sea, England, UK. Historically, astronomical images recorded on photographic plates were directly examined on inverted-color negatives because it helped the eye pick out faint details.
© Dawid Glawdzin