Creating and Downloading a Logo
Page F-4
Instruction Manual: evolution 5000 E5500 Mobile Contribution Encoder
ST.TM.E10033.3
Firstly, change the background colour so that it contrasts sharply with the
whole of the source image, using the black, red, green or blue buttons on
the toolbar. This makes it easier to spot mistakes.
The left button is used to make an area transparent (mix 0), the right
button makes it opaque (mix 255). Different mix levels can be entered for
intermediate levels of transparency. The brush size 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
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.
Palette Reallocation
When the level of transparency of a pixel in the image is changed, a new
colour is effectively created. Whenever the image is downsampled or
saved, the palette is rebuilt to reflect the actual colours in the image. As
part of this process, pixels which have a mix value of zero are mapped to
palette entry zero, which is defined as Red = Green = Blue = Mix = 0. The
original colour information is lost and the right mouse button will not
change the pixel back to its original colour.
To rebuild the palette during editing, click the Reallocate Palette toolbar
button.
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