Simple color image compression method

Abstract

The invention relates to an image compression method, in particular to a simple color image compression method. At present, the most commonly used image file format is bmp and jpg, wherein the bmp is not compressed, so the bmp occupies a relatively big storage space; and though the jpg is a relatively perfect image file compression method, the jpg belongs to loss compression and the compression ratio is not high enough. In practical application, a kind of image file, such as building design paper, mechanical design paper, an accountant primary evidence, and a bank primary evidence including an invoice, a receipt, a print, a signature file and the like, usually has the characteristics of relatively simple image and relatively single color. If the kind of image file adopts the jpg format, the efficiency is very low. The invention provides the compression method which is more efficient than the jpg in order to solve the problem. The compression method defines a new image document format Inp, which has higher compression ratio than the jpg and belongs to lossless compression.

Description

technical field [0001] The invention relates to an image compression method, in particular to a simple color image compression method. Background technique [0002] With the wide application of computer technology, traditional paper documents have been gradually replaced by electronic documents. This not only saves a lot of papermaking raw materials and the space for stacking these documents, but also facilitates fast query and transmission. There are two main types of electronic documents: text files and image files. Because usually the image file is much larger than the text file, which not only requires a large storage space, but also requires a long transmission time, so people study and use various methods to compress the image file. Especially in the popularization of network applications today, the improvement of image compression rate is more practical. [0003] The most commonly used image file formats are bmp and jpg. Among them, bmp is uncompressed, so it take...

AI Technical Summary

Problems solved by technology

Among them, bmp is uncompressed, so it takes up a lot of storage space; although jpg is a relatively complete image file compression method, it belongs to lossy compression, and the compression ratio is not high enough

In practical applications, there is a class of image files, such as architectural design drawings, mechanical design drawings, accounting original documents, bank original documents including invoices, receipts, seals and signature documents, etc., which usually have the characteristics of relatively simple images and relatively monotonous colors. At this time, using jpg format will appear to be very inefficient

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