Which is correct?

[MahaB82A]

These two are the same images. In one image surrounding building is appllied blur effect and in other image person is in the blur effect. Which is correct to show person is in the motion?

 

[gianvitulano]

Hi,
I advise you to use the image where the effect was applied to the building. 🙂

[MahaB82A]

Please tell me the reson as well. Which will help to decide on other images as well.

[davescm]

If the person is the subject - blur the background, if the building is the subject - blur the person.

Dave

[MahaB82A]

As far as I know subject is decided by the user. 

[davescm]

Then your question of 'which is correct' would also need to be answered by that user.
Dave

[MahaB82A]

In that case in my view both are correct.

[Mohammad.Harb]

usually In videos  we can tell how fast something is moving by how blurry it looks. But in Still photos, showing movement is a bit different as we need to keep the subject clear while still showing motion.

in digital SLR cameras, we often use shutter priority and sometimes speedlights to avoid a dark image when freezing the motion.

In the first photo, we see what most people expect: the subject is sharp and in focus, and the background (the building) is blurry ( Our brains are used to seeing this kind of effect usually in graphic designs )

However I prefer the second photo as it is a bit of " creative twist" : 

We can see the subject’s speed clearly, even without the background as a reference.

[MahaB82A]

I also prefer second photo because in the real world, if you think logically it is the person on the move. But I do not know standard followed in Ps. 

[pixxxelschubser]

The blur effect is incorrectly applied in the second image. It is physically impossible for a single moving object to move at different speeds. Therefore it is also impossible to clearly recognise parts of the face etc.

[Semaphoric]

The blur effect is incorrectly applied in the second image. It is physically impossible for a single moving object to move at different speeds. Therefore it is also impossible to clearly recognise parts of the face etc.

By @pixxxelschubser

Not unnecessarily. Where the bottom of a spinning wheel meets the ground, its forward velocity is zero. The flanges on rail road wheels even move backward at that point. This is why the Spin filter is not suited to this

Speed lines and motion trails are some others that people think are "correct", but are not realistic at all.

[pixxxelschubser]

However, this does not apply to the skater. She doesn't rotate.
😉

[Semaphoric]

One other way of indicating motion comes from the early days of Race Car photography with large format focal plane shutters:

Rolling shutter is not a new thing.

[MahaB82A]

Do you say this is also incorrect?

Motion Blur Effect

[pixxxelschubser]

From a physical point of view - yes. That is also wrong. Nevertheless, this is one of the most common ways to digitally display a motion blur effect. And because we have seen it so often by now and are therefore ‘used to it’, it seems right to us.

[MahaB82A]

I do not think physical matter here. This is a still photo. This is all about how will you create an impression that the person in motion.

[pixxxelschubser]

Maybe it's just a translation problem. Maybe I just misunderstood your question.

If your question is: Which of the two images is more suitable (instead of correct), then I would favour image 1 for a skater (background blurred). For a person running, your last image shown is a common variant.

[Conrad_C]

Both are different valid ways of showing a subject in motion.

Both can be created in camera depending on the decisions you make when you take the picture.

The one that is correct depends on the photographer’s creative intention for the image.

An image like the left one can be created in camera by panning the camera to match the subject as you press the shutter button, while using a slow shutter speed. This would make the subject sharp while creating motion blur in the background.

An image like the right one can be created in camera by holding the camera still as the subject goes by at high speed, while using a slow shutter speed. This would create motion blur in the subject while the background is sharp.

[D Fosse]

@MahaB82A 

This is an imitation of a classic real-life photographic situation: Your shutter speed isn't high enough to completely freeze all motion.

So you have two choices:

• you can pan the camera to freeze the skater - this is what sports photographers generally do.
• you can keep the camera still and let the skater blur past - this is what an architectural photographer would do in this case.

In other words, this is a choice, depending on what you want. You need to decide that for yourself.

[MahaB82A]

Problem is I have no experience in handdling camera, only thing is I am eager in editing photo by using Ps.