Details
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Type:
Bug
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Status: Closed
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Priority:
Major
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Resolution: Fixed
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Affects Version/s: 5.0.6_P01
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Fix Version/s: 5.0.7
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Component/s: Core/Parsing
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Labels:None
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Environment:any
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Support Case References:
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Workaround Exists:Yes
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Workaround Description:use org.icepdf.core.cmyk.disableICCProfile=true to improve performance
Description
A client has sent in a PDF that has a medium sized image (2496x3216) and corresponding image mask. The images however use a n ICC color profile which has very expensive colour look ups.
When working with ICC color profiles for CMYK pallets I found that the Java Implementation was too slow for doing image lookups. I think it's time to revisit this issue both for ICCBase and DeviceCMYK colour spaces. There is a good chance we could create a local lookup cache that would improve performance as well as getting better colour accuracy.
When working with ICC color profiles for CMYK pallets I found that the Java Implementation was too slow for doing image lookups. I think it's time to revisit this issue both for ICCBase and DeviceCMYK colour spaces. There is a good chance we could create a local lookup cache that would improve performance as well as getting better colour accuracy.
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Added a HashMap based cache for previously looked up ICC color values. The key generation is a bit rudimentary but is adequate for now as the result is a significant speed up when using the ICC profiles for CMYK.