M9 CCD color error

vincecharus

After post-processing a photo (as shown here), I find that there are magenta/purple patches on the photo which should not be there in the first place.

The second photo is a closer crop of the first one that obviously show the false colors.

Does any c-hing know what this problem is, and whether and how it could possibly be avoided or remedied.

Many thanks!

edwardyung

你是指衣服布料上的紫紅色反光嗎？

kievnut

会唔会係舞台灯光？

Wunderkind

As long as it's not the following, it should be fine.

vincecharus

kievnut 發表於 2014-8-14 07:19
会唔会係舞台灯光？

不是，這問題其實已經困擾左我好耐，經常在室內光線較低光影膚色時出現，膚色有時會有一瘩瘩紫紅色，如果問題不太大時，我會在 Lightroom 1x 或 3x crop 之下用 brush  white balance cyan + 30 至 50 掃左佢，掃了仍然會有點痕跡，但不放太大便不太覺眼，但如果問題嚴重時就會無得救（見上圖）。

我肯定不是個別 CCD 的問題，因為我換過 CCD，之後問題完全沒有改變。

edwardyung

放張RAW上dropbox俾我哋download睇睇可以嗎？

Sawlo2000

High ISo?

ballgor

Very unusual... can't think of any problem would cause this artefact.... Have you taken it to Schmidt?

redrede

Looks like the cloth material and the LED light effect, since there are different kind of purple colours on different bits. What is the shutter speed of the photo? Have you record it on video? If you do then you can compare them....

頭文字L

唔會係個 Bayer filter interpolate alogrithm 估錯色？？？