Auto Rotation

[RomanR]

Hi
Is there in IrfanView 4.10 auto rotate function?

[MItaly]

What do you mean for "auto rotation"? Something like the Straighten tool of the paint plugin?

[Skippybox]

Or do you mean auto-rotate according to EXIF?

[RomanR]

Yes i mean according to exif
i have a lot of files from any cameras and photos
and have auto rotation function 'on' in preferances-jpg-
it it doesnt work with all of them

[RomanR]

Some of them:

SageDescription -
Make - SONY
Model - DSC-H5
Orientation - Top left
XResolution - 72
YResolution - 72
ResolutionUnit - Inch
DateTime - 2007:01:01 20:45:23
YCbCrPositioning - Co-Sited
ExifOffset - 2300
....
ExifVersion - 0221
...
FileSource - Other
SceneType - Other
CustomRendered - Normal process
ExposureMode - Manual
White Balance - Auto
SceneCaptureType - Standard
Contrast - Normal
Saturation - Normal
Sharpness - Normal

.....

[RomanR]

Another file:

Make - FUJIFILM
Model - FinePix A800
Orientation - Top left

Thumbnail: -
Compression - 6 (JPG)
Orientation - Top left
XResolution - 72
YResolution - 72
ResolutionUnit - Inch
JpegIFOffset - 1350
JpegIFByteCount - 9920
YCbCrPositioning - Co-Sited

[Bhikkhu Pesala]

Properties, JPG/PCD/GIF, Autorotate images according to Exif info (if available).

[luciansabo]

Not all cameras have an orientation sensor.

You have Orientation - Top left, this means no rotation is required.

[Skippybox]

If that is your case RomanR then you will have to rotate them manually. You could use the File>JPG Lossless Transformations in the thumbnail window, which are batchable. Otherwise, you can use Batch Conversion to rotate. If you don't wish to change the files, you can always rotate in memory when viewing using L and R.

[RomanR]

Thanks for all for your answers!

[Mij]

Another file:
Make - FUJIFILM
Model - FinePix A800
Orientation - Top left

An orientation tag of Top Left indicates that the picture is already the right way up. Is that how it came from your camera or have you previously saved the file in IrfanView?

[RomanR]

Yes it came from my camera.

[Skippybox]

So, if the camera recorded Top Left, then the image is already upright. If your image is not upright, then the camera has no orientation sensor, and has simply recorded Top Left by default. Can you tell which camera's images or both, are not rotating when Auto Rotate is engaged in IrfanView?

When you find which one, you can rotate those images that are not actually upright using the methods described thus far. If you don't rotate losslessly though, you would have to reset the orientation tag to Top Left when you resave the file, so it won't be accidentally auto-rotated. Careful when doing edits, as the lossless transformations will overwrite your original files. Make sure all files are backed up before altering.

If you rotate in IrfanView using the commands, you must save the images to retain the edit, otherwise it will only be temporary in memory while browsing.


If you need help finding these commands, ask again.

[RomanR]

But another one (from Iphone 3G) - It's view correct with auto rotation:
Make - Apple
Model - iPhone
Orientation - Right top
.....
Thumbnail: -
Compression - 6 (JPG)
Orientation - Right top
ResolutionUnit - Inch
JpegIFOffset - 331
JpegIFByteCount - 7539

[Skippybox]

Yes, it has an orientation tag other than Top Left, indicating it definitely has an orientation sensor. With Auto Rotate on, the tag tells IrfanView how to rotate it, so it is upright. Your orientation tag can still be Top Left even if it has an orientation sensor. It simply means the camera was upright when the photo was taken and requires no rotation when Auto Rotate is on. But, when a camera doesn't have the sensor, it still doesn't record anything other than Top Left, so Auto Rotate won't adjust those images. There is no special orientation to read, so all images remain the way they were taken instead of upright. In effect, IrfanView thinks they are, because of the misleading Top Left tag.