8bitを16bitに変換したが変換されない

Forum|Forum|9 years ago
March 25, 2017
3 replies
1544 views

8bitを16bitに変換したがjpg保存し、開いてみると8bitに戻っているが16bitにはならないのでしょうか？

bit 変換

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gener7

Community Expert

ケンケンパー wrote
8bitを16bitに変換したがjpg保存し、開いてみると8bitに戻っているが16bitにはならないのでしょうか？

16ビットファイルを使用していて、JPEGとして保存する場合は、[名前を付けて保存]ダイアログボックスのリストからJPEGファイル形式を選択できるようになりました。ただし、JPEG形式で保存するとファイルが16ビットから8ビットに変換されます（JPEGファイル形式は16ビットをサポートしないため）。

Gene

c.pfaffenbichler

Community Expert

Returns the 8-bit and trying to open and save jpg converted 16-bit to 8-bit, 16-bit does not do?

I am afraid I do not understand.

I don’t think jpg supports 16bit so what exactly do you mean?

gener7

Community Expert

Correct. Photoshop now allows you to select jpeg if you have a 16 bit image open, but it will save it as 8 bit. He thought the option would also keep it as 16 bit.

"PSCS5 – If you’re working with 16 bit files and want to save them as a JPEG, you can now select the JPEG file format from the list in the Save As dialog box. However, you need to know that saving as a JPEG will convert the file from 16 bit down to 8 bit (as the JPEG file format does not support 16 bit)."

Saving 16 Bit Images as JPEG « Julieanne Kost's Blog

I'll move this to the Japanese language Photoshop Community.

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