alt Hacker NewsThe infamous PIL DOS errors, rooting from the library refusing to process images larger than a hard limit. Does this mean though JXL does not have that data accesible quickly?
The infamous PIL DOS errors, rooting from the library refusing to process images larger than a hard limit. Does this mean though JXL does not have that data accesible quickly?
The problem is that JXL has a ridiculously versatile modular mode which enables high-complexity “prediction” computations. These were designed to encode reusable, custom predictors that could reduce the prediction error and thus the number of bits needed to encode the error. However, the predictors can be abused to perform very complex computations instead. The prime image is only 4kx2k, but encodes a very complex prediction algorithm that happens to generate prime numbers.
In principle, a decoder could refuse to process images with predictors above a certain complexity limit, but it’s hard to know how to set such limits accurately.