Cleaning Metadata Without Altering Image

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nbrtyyujm
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Cleaning Metadata Without Altering Image

Postby nbrtyyujm » Thu Jul 07, 2016 5:48 am

I clicked Remove All Metadata, but when I Save the file, it is much larger in size so XnView must be reproccessing the image. How can I strip the metadata without altering the image?

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xnview
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Re: Cleaning Metadata Without Altering Image

Postby xnview » Thu Jul 07, 2016 6:06 am

nbrtyyujm wrote:I clicked Remove All Metadata, but when I Save the file, it is much larger in size so XnView must be reproccessing the image. How can I strip the metadata without altering the image?

in browser, use clean metadata. 'Save' recompress the image
Pierre.

nbrtyyujm
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Re: Cleaning Metadata Without Altering Image

Postby nbrtyyujm » Thu Jul 07, 2016 10:54 pm

Using Clean Metadata from the browser doesn't recompress the image? In a hex editor the cleaned file looks different from the original. I was expecting only the beginning of the file where the metadata is to be different.

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XnTriq
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Re: Cleaning Metadata Without Altering Image

Postby XnTriq » Thu Jul 07, 2016 11:15 pm

nbrtyyujm wrote:Using Clean Metadata from the browser doesn't recompress the image? In a hex editor the cleaned file looks different from the original. I was expecting only the beginning of the file where the metadata is to be different.

Did you activate Optimize (Huffman table)?

Calvin Hass (What is an Optimized JPEG? » Does JPEG Optimization affect Image Quality?) wrote:No! The huffman table optimization is a lossless (reversible) process that has absolutely no effect on the resulting image quality. If one has the option, it is almost always best to enable JPEG optimization. The extra file size savings can't hurt. However, as it may potentially reduce compatibility with some bad JPEG decoders, this may be enough of a reason for you to disable it.

nbrtyyujm
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Re: Cleaning Metadata Without Altering Image

Postby nbrtyyujm » Fri Jul 08, 2016 6:28 am

The only item activated is EXIF. Everything else is unselected.

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XnTriq
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Re: Cleaning Metadata Without Altering Image

Postby XnTriq » Sat Jul 09, 2016 2:00 am

Bug confirmed :-|

I used FujiFilm FinePixS1Pro (1).jpg and CompareIt! (Find moved sections & Align mode activated) for my tests.

p132987.png

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Re: Cleaning Metadata Without Altering Image

Postby xnview » Tue Aug 02, 2016 12:57 pm

XnTriq wrote:Bug confirmed :-|

when you use 'Clean metadata' in browser mode?
Pierre.

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Re: Cleaning Metadata Without Altering Image

Postby XnTriq » Tue Aug 02, 2016 3:45 pm

xnview wrote:when you use 'Clean metadata' in browser mode?

Yes, in the browser. (cmd_CleanMetadata isn't available in view mode, I believe.)


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