Deprecated since version 2.6: The
jpeg module has been removed in Python 3.
jpeg provides access to the jpeg compressor and decompressor written by the Independent JPEG Group (IJG). JPEG is a standard for compressing pictures; it is defined in ISO 10918. For details on JPEG or the Independent JPEG Group software refer to the JPEG standard or the documentation provided with the software.
A portable interface to JPEG image files is available with the Python Imaging Library (PIL) by Fredrik Lundh. Information on PIL is available at http://www.pythonware.com/products/pil/.
jpeg module defines an exception and some functions.
jpeg.compress(data, w, h, b)
Treat data as a pixmap of width w and height h, with b bytes per pixel. The data is in SGI GL order, so the first pixel is in the lower-left corner. This means that
gl.lrectread() return data can immediately be passed to
compress(). Currently only 1 byte and 4 byte pixels are allowed, the former being treated as greyscale and the latter as RGB color.
compress() returns a string that contains the compressed picture, in JFIF format.
Data is a string containing a picture in JFIF format. It returns a tuple
(data, width, height, bytesperpixel). Again, the data is suitable to pass to
| ||Force output to be grayscale, even if input is RGB.|
| ||Set the quality of the compressed image to a value between |
| ||Perform Huffman table optimization. Takes longer, but results in smaller compressed image. This only affects compression.|
| ||Perform inter-block smoothing on uncompressed image. Only useful for low- quality images. This only affects decompression.|
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