Methods and systems for image data compression

A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a computing system, cause the one or more processors to:

• access a first set of pixel values of an image having a bit depth, wherein the first set of pixel values comprises a first subset of pixel values and a second subset of pixel values, and wherein each pixel value in the first subset of pixel values is less than each pixel value in the second subset of pixel values;
• determine an overflow range based at least in part on a pixel value overflow associated with the bit depth, wherein the overflow range covers a second set of pixel values comprising (1) the second subset of pixel values and (2) an overflow representation of the first subset of pixel values;
• and
• in response to determining that the overflow range is less than a range covering the first set of pixel values:
• generate quantization levels corresponding to the overflow range;
• and
• associate each pixel value of the second set of pixel values with one of the quantization levels.

A system comprising:

• one or more non-transitory computer-readable storage media including instructions;
• and
• one or more processors coupled to the storage media, the one or more processors configured to execute the instructions to:
• access a first set of pixel values of an image having a bit depth, wherein the first set of pixel values comprises a first subset of pixel values and a second subset of pixel values, and wherein each pixel value in the first subset of pixel values is less than each pixel value in the second subset of pixel values;
• determine an overflow range based at least in part on a pixel value overflow associated with the bit depth, wherein the overflow range covers a second set of pixel values comprising (1) the second subset of pixel values and (2) an overflow representation of the first subset of pixel values;
• and
• in response to determining that the overflow range is less than a range covering the first set of pixel values:
• generate quantization levels corresponding to the overflow range;
• and
• associate each pixel value of the second set of pixel values with one of the quantization levels.