TANDBERG E5780, Справочное руководство

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Creating and Downloading a Logo
Reference Guide: evolution 5000 E5780 and E5782 Encoder Page D-7
ST.RE.E10135.4
The area of the image that is to remain opaque is referred to as the active area . The area of
the image that is to be made transparent is called the inactive area . Transparency can added
manually, with a brush, or by using a key file .
Adding Transparency Manually
The background colour within Osd Creator can be changed with the black, red, green and
blue buttons on the toolbar. This changes the background colour of the editor window on
which the logo is overlaid and not the logo itself, which remains unaffected. This facility is
useful to show the transparency of different colours. It is best to start with a background colour
that contrasts sharply with the whole of the source image.
Using the options immediately below the toolbar, the mouse pointer can be used as a brush to
add transparency to an area. The left mouse button will apply the transparency value set for
the
LButton Mix and the right mouse button will apply the transparency value set for the
RbuttonMix . At start-up these are set so LButton Mix is 0, to make an area transparent, and
RButton Mix is 255, to make it opaque.
Different mix levels can be entered for intermediate levels of transparency. Selecting a brush
size from the drop-down list determines the size of the area that is changed.
If the Changes Affect Palette box is checked, changing the transparency of a pixel on the
image also changes the palette entry on which the pixel is based, and all the pixels that share
that palette entry.
If the inactive area is mainly one colour, check the Changes Affect Palette box, and left-click
in the inactive area. All pixels of that colour should become background-coloured. Repeat until
the whole of the inactive area is transparent. If parts of the active area have become
transparent, uncheck the
Changes Affect Palette box, and paint with the right button to
correct these areas. Zoom in if necessary.
If there is no general colour for the inactive area, uncheck the Changes Affect Palette box
and paint the inactive area manually with the left mouse button. Use the right button to correct
mistakes. Trace around the edge of the area with a medium brush, then use the large brush
for wide areas. Zoom in to do the fine corrections.
Adding Transparency Using a Key File
A key file is a Bitmap (.bmp) file of the same size as the source file, with the active area of the
image coloured white, the inactive area coloured black, and intermediate levels of
transparency coloured grey.
Create the key file using a drawing package. Colour the active area white, and the inactive
area black. Save as a .bmp file.
Click the Key File toolbar button. Select the key file . The inactive area of the image should
now be transparent (background-coloured). Change the background colour to verify that the
correct area is transparent.
Editing the Palette
The palette may be displayed alongside the image by clicking the Show/Hide Palette toolbar
button. The transparency of each palette entry may be altered in the same way as the image
itself, using the left and right mouse buttons. Changes to the palette are shown immediately
on the image.
The Red, Green, Blue and Mix component of the pixel or palette entry under the cursor can be
seen on the status bar at the bottom of the screen.