Method for transmitting image data of a scanner

A method for transmitting image data of a scanner including the steps of:

• (i) receiving plural scanning lines of image data, and storing the scanning lines of image data in plural line buffers;
• (ii) retrieving pixel data at the sane row from the plural line buffers;
• (iii) using the pixel data to produce a low-resolution image;
• (iv) using the pixel data to produce plural data difference values, which can combine with the low-resolution image data to produce a high-resolution image;
• (v) compressing the data difference values;
• (vi) determining whether all of the scanned lines of image data are retrieved, going to next step if yes, otherwise going to step (ii);
• (vii) transmitting the low-resolution image data to a receiving end;
• (viii) transmitting the compressed-data difference values to the receiving end;
• (ix) determining whether all of the frame of image data is retrieved, going to next step if yes, otherwise going to step (xi);
• (x) providing a frame-ending signal to the receiving end;
• and
• (xi) providing a line-ending signal to the receiving end and going back to step (i).

A method for transmitting image data of a scanner including the steps of:

• (i) receiving plural scanning lines of image data, and storing the scanning lines of image data in plural line buffers;
• (ii) retrieving pixel data at the same row from the plural line buffers;
• (iii) using the pixel data to produce a low-resolution image data and storing the low-resolution image data in a buffer of the scanner;
• (iv) using the pixel data to produce plural data difference values, which can combine with the low-resolution image data to produce a high-resolution image;
• (v) compressing the data difference values and storing the compressed-data difference values in the memory of the scanner;
• (vi) determining whether all of the scanned lines of image data are retrieved, going to next step if yes, otherwise going to step (ii);
• (vii) transmitting the low-resolution image data to a receiving end;
• (viii) determining whether all of the frame of image data is retrieved, transmitting the compressed-data difference values and a frame-ending signal to the receiving end if yes, otherwise providing a line-ending signal to the receiving end and going back to step (i).

A method for transmitting image data of a scanner including the steps of:

• (i) receiving plural scanned lines of image data, and storing the scanning lines of image data in plural line buffers;
• (ii) retrieving pixel data at the same row from the plural line buffers;
• (iii) using the pixel data to produce a low-resolution image data and storing the low-resolution image data in the memory of the scanner;
• (iv) using the pixel data to produce plural data difference values, which can combine with the low-resolution image data to produce a high-resolution image;
• (v) compressing the data difference values, and storing the compressed-data difference values and a segment-ending signal in the memory of the scanner;
• (vi) determining whether all of the scanned lines of image data are retrieved, going to next step if yes, otherwise going to step (ii);
• (vii) determining whether all of the frame of image data is retrieved, going to the next step if yes, otherwise going to step (x);
• (viii) transmitting the low-resolution image data to a receiving end;
• (ix) transmitting the compressed-data difference values and a frame-ending signal to the receiving end and going to the end;
• (x) providing a line-ending signal to the receiving end and going back to step (i).