Image layered compression method and image layered compression device
A compression method and technology of compression methods, which can be used in image communication, digital video signal modification, electrical components, etc., and can solve problems such as difficulty in compression by lossless algorithms and blurring of key information.
Active Publication Date: 2021-09-07
北京数科网维技术有限责任公司
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[0003]Existing image-based compression methods can be roughly divided into two types: lossy algorithm and lossless algorithm: Among them, lossy algorithms such as jpeg and jpeg2000 have the advantage of large compression ratio , but during the compression process, it is easy to make key information such as "text" in the document blurred; and lossless algorithms are usually difficult to compress to a satisfactory volume
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[0038] In order to make the implementation purpose, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be described in more detail below with reference to the accompanying drawings in the embodiments of the present application. Throughout the drawings, the same or similar reference numbers refer to the same or similar elements or elements having the same or similar functions. The described embodiments are some, but not all, of the embodiments of the present application. The embodiments described below with reference to the accompanying drawings are exemplary, and are intended to be used to explain the present application, but should not be construed as a limitation to the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present ap...
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The invention discloses an image hierarchical compression method and an image hierarchical compression device. The image hierarchical compression method comprises the following steps: acquiring a to-be-processed file; recognizing the to-be-processed file, and obtaining target information of the to-be-processed file, wherein the target information comprises at least two different target forms and area information of each target form; and selecting one of lossy compression and lossless compression to perform compression according to the type of each target form so as to obtain an OFD layer object corresponding to the target form. According to the image hierarchical compression method, different processing methods are selected according to different target forms of the to-be-processed file, so that compared with the prior art, the image file volume can be compressed more effectively on the basis of keeping the original image resolution and the visual effect of important information such as texts, and sharing and utilization of the file are facilitated.
Description
technical field [0001] The present application relates to the technical field of image compression, and in particular, to an image layered compression method and an image layered compression device. Background technique [0002] With the development of information technology, a large amount of paper remains in history; at the same time, as a serious content carrier, electronic official documents have a fixed format for their presentation. The image format is used as the carrier of official documents for information disclosure and sharing. A good balance can be achieved in terms of accuracy. [0003] The existing image-based compression methods can be roughly divided into two types: lossy algorithms and lossless algorithms. Among them, lossy algorithms such as jpeg and jpeg2000 have the advantage that the compression ratio is large, but during the compression process, it is easy to make documents such as "text" and so on. Critical information becomes blurred; and lossless al...
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CPCH04N19/30
Inventor 刘丹王少康张同社
Owner 北京数科网维技术有限责任公司