Edited with DPP, then viewed through Zoom Browser

[olyduck]

I just got through correcting some under exposed RAW shots with Digital Photo Pro (DPP).  I did not convert the images to another file format, although I was careful to "save" each of them after editing.  I then closed DPP and opened Canon's Zoom Browser.  The same images, viewed through ZB, displayed as though they had NOT been adjusted.  I reopened DPP, just to be sure, and the images viewed through DPP had retained the adjustments I had made.  I even minimized the windows, so I could directly compare the image viewed through Zoom browser alongside the same image viewed through DPP.

If my editing a RAW file with DPP changes the original image and Zoom Browser can display those RAW files, why don't the images displayed through ZB reflect the prior editing I did through DPP?

Thanks, Dave
PS: Bob-Thanks much for your previous answers on fuzzy thumbnails and fill-flash.

[KeithB]

It could be that ZB is showing the embedded thumbnail, or that it does not understand the changes that were written to the RAW file.  If DPP writes to a sidecar file, then ZB may not understand that, either.

The problem is that there is no "default" image in a RAW file.  Unlike a JPEG, when you make "changes" to a RAW file, you do *NOT* change the actual picture information, only provide directions in the file to how it should be displayed.  If other software does not understand these directions, it cannot display it properly.  In the case of a sidecar, the original RAW is not touched (which is a Good Thing (TM)), but the directions are contained in a completely separate file that ZB may or not be able to understand.

[Bob Atkins]

I think Keith is correct.

Editing the RAW file in DPP does not change the RAW file data. That's the point of a RAW file - it contains the original unprocessed data. All editing does is add a set of instuctions to the RAW file metadata which tell DPP how you want it processed when you eventually convert it to JPEG or TIFF.

If some other program opens the RAW file, it may well ignore the instructions that DPP added, so you just see the default file with none of the edits. It's very possible that Zoombrowser doesn't read the instruction left in the file by DPP. In fact I'd assume those instructions are ignored by anything but DPP.

Nothing should ever change the image data in the RAW file. The RAW file is your "negative", your original.

[olyduck]

Bob and Keith-
Thanks for your explanation.  It makes sense as, in addition to the changes not displaying in Zoom Browser, they also didn't display in Photoshop Elements or HP Image Zone photo browsers.  When I did convert an image from RAW to JPEG in DPP, that new JPEG did, (per your explanation), display in the other browsers correctly.

I really appreciate this forum.  Thanks.
-Dave