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< p class = "lead magick-description" > ImageMagick's JPEG-2000 image formats, JP2 and JPC, accept a plethora of encoding options as detailed below. As an example, suppose you are interested in these options:< / p >
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< li > code blocks are 64 samples in width and 32 samples in height< / li >
< li > no multicomponent transform< / li >
< li > 4 resolution levels for each component< / li >
< li > compression is lossy at 64:1< / li >
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< p > Use this command to convert a JPEG-2000 image to the PNG image format:< / p >
< pre class = "highlight" > < code > convert wizard.jp2 wizard.png
< / code > < / pre >
< p > Let's convert a JPEG image to a lossless JPEG-2000 image:< / p >
< pre class = "highlight" > < code > convert wizard.jpg -quality 0 wizard.jp2
< / code > < / pre >
< p > Here we extract an area from the image:< / p >
< pre class = "highlight" > < code > convert 'wizard.jp2[640x480+0+0]' wizard.png
< / code > < / pre >
< p > Extract a particular tile from the image:< / p >
< pre class = "highlight" > < code > convert 'wizard.jp2[2]' wizard.png
< / code > < / pre >
< p > Specify a subsampling factor:< / p >
< pre class = "highlight" > < code > convert wizard.png -colorspace YUV -sampling-factor 2,2 wizard.jp2
< / code > < / pre >
< p > Save a tiled JPEG-2000 image:< / p >
< pre class = "highlight" > < code > convert wizard.png 'wizard.png[512x512]'
< / code > < / pre >
< p > Write a digital Cinema 4K profile compliant codestream:< / p >
< pre class = "highlight" > < code > convert wizard.png -resize 4096x2160! -depth 12 wizard.jp2
< / code > < / pre >
< p > Here is a complete list of JPEG-2000 decoding options:< / p >
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< tr >
< td > jp2:layer-number=< var > x< / var > < / td >
< td > set the maximum number of quality layers to decode.< / td >
< / tr >
< tr >
< td > jp2:reduce-factor=< var > x< / var > < / td >
< td > set the number of highest resolution levels to be discarded.< / td >
< / tr >
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< p > Here is a complete list of JPEG-2000 encoding options:< / p >
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< tr >
< dt class = "col-md-4" > jp2:number-resolutions=< var > x< / var > < / dt >
< dd class = "col-md-8" > number of resolutions to encode.< / dd >
< / tr >
< tr >
< td > jp2:quality=< var > x< / var > ,< var > x< / var > ,...< / td >
< td > set the quality layer PSNR, given in dB. The order is from left to right in ascending order. The default is a single lossless quality layer.< / td >
< / tr >
< tr >
< td > jp2:rate=< var > x< / var > ,< var > x< / var > ,...< / td >
< td > the compression ratio values. Each value is a factor of compression, thus 20 means 20 times compressed. The order is from left to right in descending order. A final lossless quality layer is signified by the value 1. The default is a single lossless quality layer.< / td >
< / tr >
< tr >
< td > jp2:progression-order=< var > x< / var > < / td >
< td > choose from LRCP, RLCP, RPCL, PCRL or CPRL.< / td >
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