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emoacht / SnowyImageCopy

A Windows desktop app to copy images from FlashAir by a wireless connection
https://www.microsoft.com/store/apps/9MTLPNGRW85L
MIT License
32 stars 14 forks source link

About flipped/rotated files #57

Closed dentphoto closed 3 years ago

dentphoto commented 3 years ago

Since the last bug fix, Snowy Plus 2.2.4 is always perfect without any errors. Thanks for this.

Finally~~ I would like to ask you one question.

I have sent 5 photos. Then execute the actions.

First picture: Delete Second picture: horizontal flip Third picture: vertical flip Fourth picture: clockwise rotation Fifth picture: counterclockwise rotation

http://youtu.be/E-JfR7dnuoY

All five will be marked "Once Copied" in the Snowy next shooting session.

I understand intuitively the "Once Copied" mark on deleted photo thumbnails.

One curious thing... Photos that are rotated or flipped will also change from "Copied" to "Once Copied". Is it normal and reasonable to treat the rotated or flipped files like this?

dentphoto commented 3 years ago

Oh ~ I knew it late. Flip or rotate transforms the original image, so the file size also changes. The only thing that remains after the original image is transformed, is the file with same file name & different file size.. So Snowy recognizes that the original image was virtually gone. It is natural to mark it as “Once Copied”. Is my understanding correct?

emoacht commented 3 years ago

Yes, I guess so. In theory, the data size of orientation of metadata is the same regardless of the value, a format change could happen when the orientation is edited.