Posts: 3
Threads: 1
Joined: Apr 2014
Posts: 3
Threads: 1
Joined: Apr 2014
Hi bro
I'm a semi pro photographer and also a timelapse geek ! I wasn't using LRT since last week my friend made me to test it . I know it is a pro software but I have some serious problems with it . In short "The flicker is not Deflickred !"
the problem is with the deFlicker . I think it's a bug , but not sure . here I have a sequence which is taken by canon 6D at AV priority mode , and I did some manual Expo compensations between shots . here you can see the preview
[Image: http://www.xum.ir/images/2014/04/09/step-1.jpg]
you can see it extremely suffers from Flicker . I know the techniques to avoid flicker in the field , but you know some times it's all you can do .
so I did the LRT Deflicker WorkFlow tab , Step by Step . then I clicked the Deflicker button and set the slider to it's maximum . you can see the red & blue curves .
[Image: http://www.xum.ir/images/2014/04/09/step-2.jpg]
and here is the Deflicker curve while "constant" is selected
[Image: http://www.xum.ir/images/2014/04/09/step-3.jpg]
the problem is Deflicker is not working ! I mean My sequence is not Deflickerd even a bit ! but I noticed Something that might be a bug in calculations done by Deflicker process .
the problem is , Deflicker doesn't apply correct values to normalize the expo curve . Just look closely to 3rd image . the expo is set to constant so the LRT Deflicker should calculate each shot expo and add (minus) a value to each frame to equalize the expo . so as a math point of view , this is and add curve . I mean the Blue curve is being Added to a reversed Blue curve (red curve) to meet the final desires expo . So there should be No deformation vertically or horizontally in red curve compared to a reversed blue curve .
If I apply deflicker to the blue curve in constant expo , the red curve must be exactly a reversed blue curve . but as you see in 3rd image the red curve is like a reversed blue curve , but it is being squeezed in vertical axis . so If I add the value of blue curve to the value of red curve , i won't get a straight line . so by adding the changed value caused by Deflicker to the main expo value of each frame , I wont get a constant deflickered expo .
the point is that the red curve is squeezed vertically . you can see a hip in blue curve at left down corner . the amount of correction made by red curve for this hip , is about a half tall as of the blue hip . which makes this frame far more brighter than other frames . if we apply the red curve values to the blue curve values , in some frames we have 90% expo change , in some we have 70% , in others 50% . so the relative expo changes between frames which is called "Flicker" , is being kept instead of being resolved .
I did test it on some other sequences and didn't got any batter results .
Please help me and correct me if i'm wrong
thanks for your full time support and effort
I'm a semi pro photographer and also a timelapse geek ! I wasn't using LRT since last week my friend made me to test it . I know it is a pro software but I have some serious problems with it . In short "The flicker is not Deflickred !"
the problem is with the deFlicker . I think it's a bug , but not sure . here I have a sequence which is taken by canon 6D at AV priority mode , and I did some manual Expo compensations between shots . here you can see the preview
[Image: http://www.xum.ir/images/2014/04/09/step-1.jpg]
you can see it extremely suffers from Flicker . I know the techniques to avoid flicker in the field , but you know some times it's all you can do .
so I did the LRT Deflicker WorkFlow tab , Step by Step . then I clicked the Deflicker button and set the slider to it's maximum . you can see the red & blue curves .
[Image: http://www.xum.ir/images/2014/04/09/step-2.jpg]
and here is the Deflicker curve while "constant" is selected
[Image: http://www.xum.ir/images/2014/04/09/step-3.jpg]
the problem is Deflicker is not working ! I mean My sequence is not Deflickerd even a bit ! but I noticed Something that might be a bug in calculations done by Deflicker process .
the problem is , Deflicker doesn't apply correct values to normalize the expo curve . Just look closely to 3rd image . the expo is set to constant so the LRT Deflicker should calculate each shot expo and add (minus) a value to each frame to equalize the expo . so as a math point of view , this is and add curve . I mean the Blue curve is being Added to a reversed Blue curve (red curve) to meet the final desires expo . So there should be No deformation vertically or horizontally in red curve compared to a reversed blue curve .
If I apply deflicker to the blue curve in constant expo , the red curve must be exactly a reversed blue curve . but as you see in 3rd image the red curve is like a reversed blue curve , but it is being squeezed in vertical axis . so If I add the value of blue curve to the value of red curve , i won't get a straight line . so by adding the changed value caused by Deflicker to the main expo value of each frame , I wont get a constant deflickered expo .
the point is that the red curve is squeezed vertically . you can see a hip in blue curve at left down corner . the amount of correction made by red curve for this hip , is about a half tall as of the blue hip . which makes this frame far more brighter than other frames . if we apply the red curve values to the blue curve values , in some frames we have 90% expo change , in some we have 70% , in others 50% . so the relative expo changes between frames which is called "Flicker" , is being kept instead of being resolved .
I did test it on some other sequences and didn't got any batter results .
Please help me and correct me if i'm wrong
thanks for your full time support and effort