Compression techniques for vertices of graphic models

A non-transitory computer readable storage medium configured to store instructions that, when executed by at least one processor included in a computing device, cause the computing device to implement an application that carries out steps that include:

• gathering image data, wherein:
• the image data comprises a model having a mesh,
• the mesh comprises a plurality of vertices defining a surface,
• the plurality of vertices comprises a plurality of attribute vectors, and
• the plurality of attribute vectors comprises a plurality of values;
• compressing the image data to generate a compressed data stream, wherein the compressed data stream includes:
• serially stored units of information that have been compressed, wherein:
• the units of information are encoded pairs of modified values of a plurality of modified values, wherein each unit includes information from both members of the pair, and
• the plurality of modified values are quantized versions of the plurality of values, wherein a precision of the quantization corresponds to a threshold value that is based at least in part on a largest exponent among the plurality of values;
• and
• providing the compressed data stream to a different application executing on a different computing device to cause the different application to uncompress the compressed data stream to access the image data.

A method, comprising, by an application executing on a computing device:

• gathering image data, wherein:
• the image data comprises a model having a mesh,
• the mesh comprises a plurality of vertices defining a surface,
• the plurality of vertices comprises a plurality of attribute vectors, and
• each attribute vector of the plurality of attribute vectors comprises one or more values;
• compressing the image data to generate a compressed data stream, wherein the compressed data stream includes:
• for each attribute vector of the plurality of attribute vectors:
• one or more de-interleaved respective values corresponding to a respective set of bits,
• a first byte stream comprising an encoded first portion of the respective set of bits into:
• a first group of least significant bits of the respective set of bits;
• and
• a sign bit,
• a second byte stream comprising an encoded second portion of the respective set of bits into:
• a second group of most significant bits of the respective set of bits, and
• for each of the respective set of bits, the second byte stream concatenated after the first byte stream in a data stream that is compressed;
• and
• providing the compressed data stream to a different application executing on a different computing device to cause the different application to uncompress the compressed data stream to access the image data.