Hello,
The best way to improve image quality is to modify them in an external
program first before importing in SE78. This way, if for example
you change it to 256 colours first in the external program, you may get
better results when you import it. But you would not be able to achieve
the same quality resolution as a high-definition photograph. You can
adjust the resolution of your image in the form, but this only has the
effect of making the image bigger or smaller, it does not actually
increase the quality.
The reason for all of this is that graphics in forms can greatly
increase the size of print requests and therefore seriously affect the
performance of your printers. I am sorry that I do not have a more
satisfactory outcome for you than this.
The reason why BMP image has low resolution after upload by SE78, is
that transaction SE78 convert True Color graphics to 256 colors. Some
color accuracy is naturally lost during the conversion. See the attached
note 39031 for more information.
Workaround:
Firstly, use a PC graphics processing program to convert the JPG graphic
to a BMP graphic with 256 colors. Then upload the converted BMP graphic
in transaction SE78.
Regards,
David