Lightroom/Camera Raw: Fill in empty areas in transformed image

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Particularly with architectural images it is useful to transform the image to make building edges vertical or horizontal.   This leaves the image in an odd shape with missing corners that need to be cropped - or perhaps small corners that could be patched up with the clone tool.  However, the clone tool does not work in this case because these areas are outside of the original image.

Why can't Lightroom fill in these blank areas with some added pixels so that this subsequent editing can be done within LR?
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pecohen

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Posted 2 months ago

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pecohen

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Just as a clarification, a way this might be accomplished is, following a change of this sort, the canvas could be expanded to a rectangle;  Alternatively, there could be an option in the Transform menu to expand the canvas to a rectangle.  
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Todd Shaner, Champion

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Why can't Lightroom fill in these blank areas with some added pixels so that this subsequent editing can be done within LR?
LR is a non-destructive raw file editor, which never modifies the raw file's image data. In order to implement your suggestion a 2nd raw file would need to be created with an expanded canvas area. Given that each camera manufacturer's raw file format is proprietary Adobe may not have sufficient information to implement canvas expansion. Also keep in mind the "modified" raw file copy may not work properly in other raw editing applications, including the manufacturer's own raw editing software.

The simplest way to do his currently is use 'Edit in Photoshop, which also has better cloning tools than LR.

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pecohen

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I don't think that issue would give a competent software designer much of a challenge and I have little doubt that Adobe has some competent designers.  Notice that in opening a new image in Lightroom, the first step is to build a raster image from the raw file.  It would not be difficult to adjust the size of that raster image upward as part of that construction.  The only added data in the catalog would be four integers to specify the number of extra pixels to add to each of the four sides.

Earlier, when the canvas first needs to be expanded to accommodate the extra editing with the clone brush, it would not be hard to add the step of recording the four numbers use in the future when the image is again opened. 
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Todd Shaner, Champion

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Where will the "new" raw data for the cloned area in the expanded canvas be stored? That will take a lot more than four coordinates.
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pecohen

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Those are simply editing changes to be stored in the catalog like any other editing changes.  
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Todd Shaner, Champion

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I'm not sure "simple" is the right word for what you're requesting, but I'll change this to an 'Idea,' since you are requesting new functionality. That will help to get Adobe's attention. I'll also add my 'Me To' vote.
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Cletus Lee

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I think this idea to expand the canvas for further processing in LR has merit.  From the current discussion,  it appears that a container needs to hold this larger canvas,  The logical choice would be an intermediate DNG file similar to HDR, Panorama and Enhanced Details.   Frequently there is so much edge detail that is lost with a constrained Crop.  Often the Expanded Canvas needed to produce a maximum data crop is small and it is hard to justify a round trip to Photoshop just to add a Content Aware fill to an expanded canvas.   Speaking of Content Aware Fill, it would be nice to add that feature to the Lightroom Clone process.
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David Converse

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No. This is a job for Photoshop.
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Todd Shaner, Champion

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The logical choice would be an intermediate DNG file similar to HDR, Panorama and Enhanced Details.
Agreed. That way the original raw file remains unmodified and it's more likely Adobe can implement this using the open source DNG file format.
No. This is a job for Photoshop.
I agree that PS has better tools for this purpose, but it would be useful to have this capability inside LR.