12 Replies Latest reply on May 14, 2010 12:49 PM by Chris Cox

    Advanced Radial and Motion Blur

    AlexMxi Level 1

      Adding a couple of additional settings for radial and motion blur would be very appreciated.

      Currently they are applied to the both sides of a sample.

      Can we also have:

      - limited motion blur which is applied to one of the sides of a sample

      - radial blur with two additional options: one with blur towards the centre and one - away from the centre.

       

      That would allow rear and front curtain flash synch immitation.

       

       

      A couple of other useful improvements for the radial blur:

      - optional preview inside the dialogue for positioning the centre of the blur (preview can be static if performance does not allow)

      - ability to position the centre of the blur outside of the frame

       

      Thank you,

      Alex

        • 1. Re: Advanced Radial and Motion Blur
          c.pfaffenbichler Level 9

          Radial Blur could certainly use an overhaul (preview would be nice).

           

          But how exactly do You envision a one-sided Motion Blur?

          • 2. Re: Advanced Radial and Motion Blur
            Reynolds (Mark) Level 4
            But how exactly do You envision a one-sided Motion Blur?

             

            I guess that would be like the old low res "Wind" filter? Good idea that one, I like it. All these similar blurring, movement blurring filters should be brought under one master interface, with more options. To group filter TYPES in this way would simplify things. And getting rid of the slow to operate and fairly pointless Filter Gallery in the process.

            • 3. Re: Advanced Radial and Motion Blur
              AlexMxi Level 1

              Ok, here you go (these are in addition to the current double sided blurs):

              blur01.jpg

              • 4. Re: Advanced Radial and Motion Blur
                c.pfaffenbichler Level 9

                Well, for solid forms that might look easy, but what about objects of differing color-areas?

                For example objects with a black fringe – would the motion blur be black then or include the inner regions’ colors; and should the motion blur be »in front of« or »in back of« the object?

                • 5. Re: Advanced Radial and Motion Blur
                  AlexMxi Level 1

                  Obviously, the technology is the same as in the current motion/radial blur. It blurs everything. I left those blue sample points for reference to the blur direction. So basically it shows two layers before and after the blur.

                  • 6. Re: Advanced Radial and Motion Blur
                    Level 7

                    Think about this a bit.

                     

                    Take a simple case:  a blue box on a white background, and a blur to the right.  On the right edge of the box, the blue pixels get blurred into the white background - just what you want.  But on the left edge of the box, the white pixels get blurred into the blue box -- not what you want.  And that will happen for any blur**, because it doesn't know about edges, or planes, or foreground/background -- it can only blur the pixels in the image.

                     

                    You can do directional blurs today with several tools in Photoshop.  But you cannot do shape isolated blurs on a single layer because the blur has no way of knowing what should contribute and what should not: what's in front, and what is in back.

                    What you can do is isolate the foreground shapes by putting them on a separate layer, so the background colors can no longer contribute.

                     

                    But those "perfect" motion blurs you illustrated aren't going to happen with a single filter operation.

                     

                     

                     

                    ** Edge preserving blurs like SurfaceBlur and Median may look like they know about edges, but they don't.  They still operate on values and don't understand separation or direction.

                    • 7. Re: Advanced Radial and Motion Blur
                      AlexMxi Level 1

                      Does this picture make it more clear? No need to preserve the shape, everything can be blurred as it's done now, but with an option to blur to one of the sides only. I can immitate motion blur by applying half of it and shifting to one side. But it's much trickier with the radial zoom. I have to find the exact blur centre and scale it from the same spot. It could've been done within the filter itself I believe.

                      blur02.jpg

                      • 8. Re: Advanced Radial and Motion Blur
                        Level 7

                        Motion blur to one side is the same as offsetting the result.

                         

                        Radial Blur - yeah, that's trickier, because you would have to offset radially.

                        A polar coordinate transform, motion blur, offset half the blur distance, and reverse transform would let you come close to it.

                         

                        But it sounds like we need more tools (and maybe some tutorials) for realistic motion blur.

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                        • 9. Re: Advanced Radial and Motion Blur
                          AlexMxi Level 1

                          Also a couple of different fall-off options would be useful.

                          • 10. Re: Advanced Radial and Motion Blur
                            c.pfaffenbichler Level 9

                            Don’t know if this could help, but I did a Script sometime that distributes copies of a Smart Object along a Path, which (naturally depending on transparency) can be used to fake a one-sided motion-blur (see example).

                            It’s not fast, though, and not a Filter, but as it’s SO copies some editability is maintained.

                            pathImageDistr.jpg

                            • 11. Re: Advanced Radial and Motion Blur
                              PECourtejoie Adobe Community Professional

                              Chris, what if this blur was in fact applied as a layer style, on a copy of the image, but composed and shifted under the image, giving the impression of a motion trail?

                              • 12. Re: Advanced Radial and Motion Blur
                                Level 7

                                We're still looking into what we might be able to do.