Canon fax basic 2000 Manuale Di Servizio

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RECORDING SECTION

2.3

Ink Saving/Toner Saving

This process is performed to save the amount of ink and toner that is con-

sumed during printing. On BJ printers, this is called the “ink saving” func-

tion, and on LBP, this is called the “toner saving” function. This function is

valid when it is set on user registration switches. This section describes an

example of the ink saving function.

• Ink saving function

The amount of ink consumed and the ink drying time are reduced by

appropriately converting areas of the image data containing lots of black

pixels to white. To be more precise, the focus is applied to a certain single

pixel, and the pixels to the left, right, top and bottom of that pixel are

investigated. If all of the pixels to the left, right, top and bottom of that

pixel are black, the focus pixel is converted to white. The following three

patterns are available according to the number of pixels to be targeted.

Fig. 4-10   Ink Saving (1)

The following shows an instance where an black/solid image is converted

according to pattern 3.

Fig. 4-11   Ink Saving (2)

: Focus pixel

: Black pixel

: White pixel

Pattern 1

Pattern 2

Pattern 3

Black/solid image

Image after conversion

Image is converted

by pattern 3.