How to remove a TV channel logo
Info
Settings
Logo removal type
Setting the logo rectangle
Mask creation
Number of frames to be examined
Background uniformity
FadeInfo Logos are usually shown at top left or top right of the TV screen and serve to indicate the current channel.
They are often white and static. Sometimes they are more complex, being colored, transparent or containing moving elements.
Some are unobtrusive while others are really obnoxious.
Logo removal has been greatly improved in version 1.2.Settings
Logo removal type The main choice you have to make is whether you interpolate from the border, diminish by making the brightness in the logo equal to the surrounding or remove using a mask (and interpolation from the remaining pixels). Setting the logo rectangle You can type the coordinates or let the preview come up and drag the mouse in the "before" image (the logo pane must be selected in main window).
To enter the current coordinates as selection rectangle: press option-enter.
To move the rectangle: use cmd-arrow
To size the rectangle: use option-cmd-arrow
To confirm: use return or enter
To cancel: use cmd-period, escape, delete, backspace or clear.
Mask creation JVC can automatically find the mask if you indicate a reasonably accurate search rectangle. To do this select another removal type temporarily and proceed as described in the previous paragraph. Then unckeck "Apply" and choose "Mask" so you can make mask settings at ease. Check "Find mask" and "Apply" and the search should start after a few seconds (if you have a movie open). You will most likely have to polish an automatically obtained mask in a painting application.
Alternatively you can import a movie frame in a paint application and edit it until you are left with a black & white logo mask, then reduce the size (don't scale, keep one corner). You may leave the mask picture at the original movie frame size if you prefer.Number of frames to be examined Setting a large number of frames to be examined (max.1000) may result in a better logo definition.
This is relevant even if we already have a mask, as we still need an automatic settings run to calculate the logo pixels' color.Background uniformity A high background uniformity requirement (like 0.9) may result in better automatic transparent logo detection but there is a risk that not enough suitable frames are found (two differently colored sets of uniform background frames are needed to detect a transparent logo). Fade You can make the logo fade out at the start of the movie after a certain number of seconds and fade back in at the end. The fade itself takes one second.