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Simple question: How to retain file size after just rotating image



 
 
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  #1  
Old February 25th 08, 05:30 AM posted to rec.photo.digital
Yong Huang
external usenet poster
 
Posts: 2
Default Simple question: How to retain file size after just rotating image

I use IrfanView to open a 1265KB jpg file and rotate the image 90
degrees. If I save it with best quality (100 under JPEG/GIF save
options), the file size becomes 2086KB. I don't want to over- or under-
sample the image. All I need is to rotate the image because the
picture was taken sideways. How can I keep the file as is including
resolution after the rotation? Thanks.

Yong Huang
yong321 at yahoo.com
  #2  
Old February 25th 08, 05:59 AM posted to rec.photo.digital
Paul Furman
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Posts: 7,367
Default Simple question: How to retain file size after just rotatingimage

Yong Huang wrote:
I use IrfanView to open a 1265KB jpg file and rotate the image 90
degrees. If I save it with best quality (100 under JPEG/GIF save
options), the file size becomes 2086KB. I don't want to over- or under-
sample the image. All I need is to rotate the image because the
picture was taken sideways. How can I keep the file as is including
resolution after the rotation? Thanks.


Shift-J does lossless jpeg rotating for my version. No saving involved.
It's in the Options drop-down.
  #3  
Old February 25th 08, 11:00 PM posted to rec.photo.digital
Yong Huang
external usenet poster
 
Posts: 2
Default Simple question: How to retain file size after just rotatingimage

On Feb 24, 10:59 pm, Paul Furman wrote:
Yong Huang wrote:
I use IrfanView to open a 1265KB jpg file and rotate the image 90
degrees. If I save it with best quality (100 under JPEG/GIF save
options), the file size becomes 2086KB. I don't want to over- or under-
sample the image. All I need is to rotate the image because the
picture was taken sideways. How can I keep the file as is including
resolution after the rotation? Thanks.


Shift-J does lossless jpeg rotating for my version. No saving involved.
It's in the Options drop-down.


Thanks, Paul. I downloaded Jpg_transform.dll into plugins folder and
it worked. The new file after image rotation is slightly smaller
though, for instance, 4,750 vs the original 4,989 bytes, 334,353 vs
346,081 bytes. But that's good enough.

Yong Huang
 




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