Lossless compression of fragmented image data

1. A system, comprising:

a processor configured to:

receive an input sequence of data comprising a first channel;

generate a second channel based at least in part on at least one transform of data of the first channel, wherein the at least one transform is based at least in part on an estimated compressibility of transformed data of the first channel; and

generate a compressed output by encoding the second channel with a variable length code; and

a memory that stores the compressed output;

wherein the compressed output is based on a selection of one or more thresholds according to data elements of the second channel, and the one or more thresholds are selected based at least in part on a distribution of values corresponding to the data elements of the second channel and a frequency of values corresponding to the data elements of the second channel.

2. The system of claim 1 , wherein the variable length code is adapted to statistics of the data elements of the second channel.

3. The system of claim 1 , wherein the one or more thresholds are selected based at least in part on using at least a sequence of values corresponding to the second channel, a depth, and a frequency threshold.

4. The system of claim 1 , wherein generating the second channel comprises performing a plurality of transforms including a differential transform.

5. The system of claim 1 , wherein the at least one transform on the data of the first channel reduces or eliminates a redundancy of the data of the first channel.

6. The system of claim 1 , wherein the at least one transform on the data of the first channel uses a continuity of data of the first channel.

7. The system of claim 1 , wherein the at least one transform on the data of the first channel exploits continuity properties within the first channel, and the second channel is more compressible than the first channel.

8. The system of claim 1 , wherein the input sequence is associated with a fragment of an image.

9. The system of claim 8 , wherein the fragment is independently compressed and decompressed without reference to other fragments of the image.

10. The system of claim 8 , wherein the at least one transform of data of the first channel is a different transform, and the at least one transform of the data of the first channel is applied for every pixel independently.

11. The system of claim 1 , wherein a first transform of the at least one transform corresponds to a differential transform, and first data elements of the second channel and the first channel are the same, and the remaining data elements of the second channel comprise differences between consecutive data elements of the first channel.

12. The system of claim 1 , wherein the compressed output comprises a lossless compression of the input sequence.

13. The system of claim 1 , wherein the compressed output is based on a selection of one or more thresholds according to data elements of the second channel, and the selection of one or more thresholds are selected by performing a threshold selection process.

14. A method, comprising:

receiving, by one or more processors, an input sequence of data comprising a first channel;

generating, by one or more processors, a second channel based at least in part on at least one transform being performed with respect to data of the first channel;

generating, by one or more processors, a compressed output by encoding the second channel with a variable length code; and

storing the compressed output;

wherein the compressed output is based on a selection of one or more thresholds according to data elements of the second channel, and the one or more thresholds are selected based at least in part on a distribution of values corresponding to the data elements of the second channel and a frequency of values corresponding to the data elements of the second channel.

15. The method of claim 14 , wherein the variable length code is adapted to statistics of the data elements of the second channel.

16. The method of claim 14 , wherein the generating the second channel comprises performing a plurality of transforms including a differential transform.

17. The method of claim 14 , wherein the at least one transform performed with respect to the data of the first channel exploits continuity properties within the first channel, and the second channel is more compressible than the first channel.

18. The method of claim 14 , wherein the at least one transform performed with respect to the data of the first channel is selected based at least in part on a compressibility of data resulting from the transform.

19. The method of claim 14 , wherein the at least one transform performed with respect to data of the first channel is a different transform, and the transform of the data of the first channel is applied on a pixel-by-pixel basis.

20. A computer program product embodied in a non-transitory computer readable storage medium and comprising computer instructions for:

receiving an input sequence if data comprising a first channel;

generating a second channel based at least in part on a transform of data of the first channel, wherein the at least one transform is based at least in part on an estimated compressibility of transformed data of the first channel;

generating a compressed output by encoding the second channel with a variable length code adapted to statistics of data elements of the second channel; and

storing the compressed output;

wherein the compressed output is based on a selection of one or more thresholds according to data elements of the second channel, and the one or more thresholds are selected based at least in part on a distribution of values corresponding to the data elements of the second channel and a frequency of values corresponding to the data elements of the second channel.