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Thread started 22 May 2004 (Saturday) 13:36
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Interesting PROBLEM with 300D

 
alsmith
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May 22, 2004 13:36 |  #1

I am finding that when I have auto rotate on in the camera it does not export all the settings information to my computer? If auto rotate is not on then there is no problem.

Has anyone else had this problem or is it just they way the camera is?


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dtrayers
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May 22, 2004 15:06 |  #2

Can you be a little more specific? What particular settings and what program are you trying to examine them with?


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alsmith
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May 22, 2004 16:13 |  #3

I took a bunch of photos on Program (P) mode and when i uploaded them to my computer all the normal ones had all the exif informaion with them and the ones that were taken vertically and then rotated automatically by the camera had no data with them... like shutter, apperature, and so on.. If auto rotate is not on them they are fine.


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dtrayers
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May 22, 2004 17:25 |  #4

What did you upload them with and what are you viewing them with?

The camera doesn't rotate the image, it just sets a flag in the file header that tells programs that can read the flag how the frame should be rotated. Some programs, like Breezesys DownloaderPro will actually rotate the image losslessly and preserve the EXIF info.

Perhaps the program you're using for the rotation is deleting the EXIF information.

I use DownloaderPro for downloading and I've taken thousands of frames with the 300D. Many of them were rotated and I never lost the EXIF information.


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Conk
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May 22, 2004 20:33 |  #5

I agree with dtrayers. Some software will cause data loss with something as simple as a rotation. Irfanview also has a lossless jpg rotation.


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alsmith
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May 23, 2004 00:08 |  #6

Thanks Guys... I have been using iPoto with my jpgs so I will do and experiment tomorrow to see if it is iPhoto.

Thanks Again and I will post the results.


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Olegis
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May 23, 2004 00:15 |  #7

I use simple copy / paste procedure with my CF card reader. This way all the files are copied as they are without any changes. When I open the images in Photoshop CS for post-processing, it rotates the vertical images automatically.


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c0ntr0lz
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May 23, 2004 00:36 |  #8

i haven't had that issue
altho i don't have th rotate option on
but doesn't that juat rotate the image on the screen not the image itself?


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tommykjensen
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May 23, 2004 00:45 |  #9

I have not experienced this particular problem. I transfer all my images with a card reader.

But I have seen that for example ThumbsPlus could not display EXIF information correctly so as other say it is probably more likely that it is cause by the software You are using.


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Bruce ­ Hamilton
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May 23, 2004 09:14 |  #10

c0ntr0lz wrote:
...doesn't that juat rotate the image on the screen not the image itself?

As dtrayers mentioned, it sets a flag in the file header. The camera can read the flag, and rotates the image vertical in the LCD screen. If your viewing software can read the flag, it will rotate the image as it opens, but the image will come out of your camera sideways. I prefer to use windows viewer and rotate the file manually.


  
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defordphoto
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May 23, 2004 09:33 |  #11

Bruce Hamilton wrote:
c0ntr0lz wrote:
...doesn't that juat rotate the image on the screen not the image itself?

As dtrayers mentioned, it sets a flag in the file header. The camera can read the flag, and rotates the image vertical in the LCD screen. If your viewing software can read the flag, it will rotate the image as it opens, but the image will come out of your camera sideways. I prefer to use windows viewer and rotate the file manually.

Be careful with JPEG files! Windows viewers/rotaters are not lossless so everytime you rotate a photo, you're recompressing the file. Other software (like BreezeBrowser) are lossless and will rotate JPEGs with no recompression.


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Bruce ­ Hamilton
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May 23, 2004 10:08 |  #12

RFMSports wrote:
Windows viewers/rotaters are not lossless so everytime you rotate a photo, you're recompressing the file.

Wasn't aware of that, thanks... For future shots, I'll leave them. :)


  
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alsmith
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May 23, 2004 14:55 |  #13

how is the file viewer utility that comes with the Canon software for this... is it lossless?


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