TANDBERG E5780, Справочное руководство

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Creating and Downloading a Logo
Page D-6 Reference Guide: evolution 5000 E5780 and E5782 Encoder
ST.RE.E10135.4
Figure D.4: OSD Creator Screen Showing Example Logo
D.5.2 Loading a .bmp File
Select File/Open from the menu, and choose a file with a .bmp extension. The image is
displayed in its own window. The application does not accept compressed bitmaps or multi-
planed bitmaps. If a 24-bit colour bitmap image is loaded into
Osd Creator it will be
automatically converted down to a 256 colour palette.
D.5.3 Creating Transparency
Overview
Each pixel in a .bmp file is represented by a red, green and blue component, each with a
value 0 to 255.
Osd Creator adds a fourth component for the transparency of the pixel. This is
referred to as a mix or transparency (T) value and is displayed in the bottom right status
panel. The transparency component also has a range of 0 to 255, where 0 is fully transparent
and 255 is fully opaque.
Osd Creator uses a colour palette with a maximum of 256 entries. Each pixel in the image is
mapped to an entry in the palette, which holds a value for the red, green and blue and
transparency component. The transparency (or
mix ) is treated as a colour component, so for
two colours with identical red, green and blue values, but different transparency levels, two
entries will be generated in the palette.
When a bitmap image is loaded, all colours have a transparency value of 255 (opaque).
Left Mouse Button
Transparency
Value
Right Mouse
Button
Transparency
Value
Change
Background
Colour
Zoom
View
Transparency
Component
Of Pixel
Image Properties
Red
Component
Of Pixel
Blue
Component
Of Pixel
Green
Component
Of Pixel
Transparency
Brush Size