Pixela Corporation DCR-TRV340 PIXELA ImageMixer 1.0 Instruction Manual page 207

Hard Light
Darken
Lighten
Difference
Transparency slider
The pixels of the foreground image will be lightened
if they are 50% brighter than the pixels of the
background image. Black and white pixels remain
unchanged.
Displays only the parts of the foreground image that
are darker than the background image.
Displays only the parts of the foreground image that
are lighter than the background image.
Subtracts the foreground color from the background
color, or vice versa, depending on which has the
greater brightness value.
Drag the slider to specify the transparency of the
picture.
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