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ifm
System Manual
ecomat
mobile
PDM360NG (CR1080, CR1081, CR9042) Target V01
2011-07-28
Visualisations in the device
Basic information about colours and bitmap graphics
121
Example: reducing a pixel image
7402
Task:
An existing digital photo with a resolution of 5 megapixels has, for example, an image size of
2560 x 1920 pixels (= 4,915,200 pixels). This photo is to be displayed in an image size of only
800 x 480 pixels (= monitor size for PDM360NG).
Problem 1:
The side to height ratio is 4:3 (1.33:1) for the source but 15:9 (1.66:1) for the target.
Solution (anisotropic): Scale the height and side of the image in different scales to represent an
undistorted image on the display.
For a uniform (isotropic) scaling the image is distorted compared to the original.
Problem 2:
After scaling there are only 384,000 pixels (= 7.8 % of the original image), the other
4,531,200 pixels are no longer available. In other words: Horizontally only every 3rd pixel is used,
vertically only every 4th pixel.
Therefore such a transformed photo can no longer have the quality of the original. Important
information is lost and the image is distorted.
►
Solution:
Create images in the required size and resolution right from the start.
Adapt bitmap graphics
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Using the following tools you can adapt existing bitmap graphics (selection):
Gimp
(freeware)
UltimatePaint
(freeware)
Paint (part of the Windows operating system; can be used for Windows 7 or higher)
Adobe
Photoshop
Corel
Photopaint
NOTE:
Please do not use the tool Ivan Image Converter to create splash screens for the PDM. The
tool generates an invalid end identifier, which destroys the system contents of the PDM.
Please ask your
ecomat
mobile
specialist!