Colorizing Videos and Pictures


VirgaVideo allows you to adjust the brightness, contrast, and color of your videos and pictures.  To do this, right click an object and then select EditLevels.


The levels curve (see picture below) is shown, and you can fine tune the colors until your pictures and videos look good.

To adjust the curve, click on the graph to create a control point and then move it by dragging.  Moving a control point above the diagonal line will make the picture brighter, and moving it below the diagonal line will make the picture darker (see examples below).  Right clicking a control point will delete it.

Moving a control point on the left side of the graph will adjust the dark portions of the picture, while moving a control point on the right side of the graph will adjust the bright portions of the picture (see more examples below).

In many cases, you will either want to brighten (or darken) the mid-tones of the picture with a gentle curve as shown in the example at the top of this page.

Channel: After you have adjusted the general brightness and contrast with All channels selected, you might find that the colors are not correct (e.g. the picture might be tinted red).  To adjust only one primary color at a time, select the Red, Green, or Blue channel, and move the control points.  In the example at the top of this page, the image was too red after adjusting only the All channel.  This was corrected by adjusting the red channel to be darker than the blue and green channels.

Copy/Paste/Reset: If you have spent some time creating a curve you like, you can copy it to the clipboard by clicking the Copy button.  Then select as many objects as you want, and click the Paste button.  The curve will be copied to all selected objects.  The Reset button will reset the levels curve back to normal.

Undo: All changes you make are saved, and you can undo them by pressing CTRL-Z.  To redo the change, press CTRL-Y.

Level Adjustment Examples

In the example below, I have increased the overall brightness of the picture by adjusting the mid-tones.  The control point is near the middle of the horizontal axis (hence, we are adjusting the mid-tones) and above the diagonal line (hence, we are brightening them).   Note that I am adjusting only the All channel, which will adjust the red, green, and blue channels at the same time.


We can increase the contrast of the picture by darkening the dark sections, while at the same time brightening the brighter sections.  In the example below, I have added a new control point.  This new control point is near the left side of the horizontal axis (hence, we are adjusting the darker sections of the picture) and below the diagonal line (hence, we are making them darker).


When I adjusted the brightness and contrast, I lost some of the blueness of the sky.  This can be fixed by clicking the Red, Blue, or Green channel, and adjusting each color individually.  In this example, I have increased the bright portions of the blue channel, while decreasing the red and green channels.  This makes the brighter parts of the picture more blue without affecting the darker areas.


And, you can do some really strange things if you want…

Tinting and Transparency

VirgaVideo allows you to change the color of videos and pictures.  This effect is key-framed, so you can have the video fade to red, then to green, and back to normal.  NOTE: This option a special effect, and should not be used as a general purpose way to correct the color of a picture or video.  Instead, use the levels adjustment tool.


To use the color key-framing tool, right click an object and then select EditColors.


The color key-framer (see picture below) is shown, and you can change the picture or video color.

All videos and pictures initially start with a single white key-frame at the beginning (see picture to the left).  A white key-frame means that the object will not be tinted, while colored key-frame means that the it will be tinted to that color.

Clicking a color will insert a new key-frame at the current time.  In the picture to the right, a purple key-frame was added by clicking the purple color while the video time was set to 4.54.

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Interpolation: When there is more than one key-frame, the colors will be interpolated (i.e. they will fade smoothly from one color to the next).  In picture to the right, several key frames have been added.  The video will be un-tinted (i.e. a white key-frame) for the first 3.5 seconds.  It will then fade to purple (over approximately one second) and then fade to blue, and then fade back to being un-tinted.

Insert/Remove/Cut: The Insert button will insert a new key-frame at the current time with the currently interpolated color. The Remove button will remove the key-frame at the current time (in the picture above, the currently selected key-frame is highlighted in pink).  The Cut button will insert a new key-frame at the current time with the currently interpolated color, and then remove all key-frames thereafter.

Transparent/Solid: The Transparent button will make the object invisible, and the Solid button will make the object visible.  This can be used to have the object fade in and out of existence, like a ghost.  NOTE: If you want the object to exit the scene by fading away, you should use the object exit function instead.

Background Color: When editing text, you can select the background color.

Undo: All changes you make are saved, and you can undo them by pressing CTRL-Z.  To redo the change, press CTRL-Y.

Multiple Objects: You can edit the color of multiple objects at the same time by selecting more than one:

Video Color Demo

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