JPEG image decoding and jpeg Decoding
Introduction
JPEG is a widely used standard method for compressing images. JPEG is the abbreviation of JointPhotographicExpertsGroup. A file in this compression format is generally called JPEG. The common
BMP format
BMP is short for bitmap. It is a standard image file format in windows and can be supported by multiple Windows applications. With the popularity of the Windows operating system and the development of a wide range of Windows applications,
Ijg JPEG function library: file listIjg JPEG function library: file list copyright (c) 1991-1996, Thomas G. Lane. This article is part of the independent JPEG group software. For how to distribute and use readme files, see the README files issued
Before introducing image compression encoding, consider the following question: why compression? You don't need to answer this question. Because the amount of data in the image information is amazing. For example, we can see that the data volume of
0x00 PrefaceContinue to learn the art of steganography, this time to learn and understand the JPEG file format. Compared with the PNG file format, the JPEG file is relatively simple, the way to read the hidden payload is similar, the difference
AppearOerror:decoder JPEG not availableThe reason is that there is no JPEG library, and to support PNG images, but also to install ZLIB, FREETYPE2, littlecms library files.The first solution: Complete installation of these libraries!!!!Installation
Picture compression is how important, perhaps many people may not have an intuitive understanding, for example, a 800x800 size of ordinary pictures, if not compressed, probably around 1.7MB, this volume if the text file is enough to save a 920,000
BMP and JPEGAuthor: Shu RongwenDate: 2016.5.291. What is BMPThe BMP format is the simplest and most intuitive bitmap data format. Its thought is very simple:The information of a pixel is saved by a number of bits, and a pixel stream is formed by a
When PIL is installed 64-bit in python2.7 under win7, a message is displayed, such as JPEG support not available, indicating that the image Connection Library is unavailable,
The error message returned when the error message does not exist in 32-Bit
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