Epson GT-6500 EN - Manual (Page 51)

Image Processing Commands
Image processing commands are used to modify scanned data before
sending it to the computer. Two commands are available: halftone
processing and color correction.
1. Set halftoning mode (ESC B)
This com m and enables or disables halftone processing for
bi-level data and quad-level data. The type of processing
perform ed is outlined below . H ow ever, the type of processing
available differs by scanner m odel. See A ppendix B for details.
This com m and also enables or disables Text Enhancem ent
Technology. This function is only available for B5 or A 5
com m and level scanners or higher.
❏ No data processing
Unprocessed data is sent directly to the computer. Use this setting
when scanning characters or line art that needs no processing.
❏ Halftoning mode A
Produces hard tones using the Error Diffusion method, producing
images with higher contrast. This is appropriate for most images.
❏ Halftoning mode B
Produces soft tones using the Error Diffusion method. This
method produces a softer image than halftoning
mode A.
❏ Halftoning mode C
Produces an image using a screen, again using the Error Diffusion
method.
❏ Dither mode A
Processes data using a 4
×
4 bayer pattern
Command Usage 2-13