Gray-scale heat-sensitive printing method, heat-sensitive printer and readable storage medium

Abstract

The invention provides a gray-scale heat-sensitive printing method, a heat-sensitive printer and a readable storage medium. The printing method comprises a bitmap processing step, a lattice diagram conversion step and a printing step. The bitmap processing step comprises: receiving an original bitmap; acquiring pixels of the original bitmap; generating a pixel array relative to the original bitmap; taking out an RBG (Red-Black-Green) value of a current pixel and generating an index of the current pixel; processing RBG value elements of surrounding pixels of the current pixel according to the RBG value of the current pixel, the index of the current pixel and a processing coefficient; and saving RBG values of the surrounding pixels. The lattice diagram conversion step is to generate a lattice diagram from a new bitmap. The printing step is to perform heat-sensitive printing according to the lattice diagram. Indexes of black and white are generated; a preset processing coefficient is accumulated into the surrounding pixels; the lattice diagram is generated according to the processed new bitmap; and lastly, gray-scale printing is finished. Through processing of a colored bitmap, gray-scale printing of patterns can be realized by heat-sensitive printing.

Description

technical field [0001] The invention relates to the field of thermal printing, in particular to a grayscale thermal printing method, a thermal printer and a computer-readable storage medium. Background technique [0002] ATMs in banks, checkout counters in supermarkets, and e-commerce delivery offices are all equipped with thermal printers for printing transaction receipts, receipts or express delivery orders. Limited by the principle of thermal printing, generally only text is recorded on the thermal printing receipt, and it is difficult to form an image through the combination of black dots and white dots, and it is even more difficult for grayscale imaging. With the variety of printing content In addition to forming the transaction record text on the small ticket, the printing of the pattern can not only improve the aesthetics, but it can print the image more vividly by using grayscale printing. However, it is impossible to realize the color bitmap through thermal printin...

AI Technical Summary

Problems solved by technology

Limited by the principle of thermal printing, generally only text is recorded on the thermal printing receipt, and it is difficult to form an image through the combination of black dots and white dots, and it is even more difficult for grayscale imaging. With the variety of printing content In addition to forming the transaction record text on the small ticket, the printing of the pattern can not only improve the aesthetics, but it can print the image more vividly by using grayscale printing. However, it is impossible to realize the color bitmap through thermal printing in the prior art Realize grayscale imaging

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