Methods of compressing a texture image and image data processing system and methods of generating a 360 degree panoramic video thereof

A method of generating a 360 degree panoramic video, comprising:

• receiving a compressed texture image, wherein the compressed texture image has a plurality of pixel lines i, each of the pixel lines i comprising a first number of pixels and each of the pixel lines i having a plurality of parameter values, wherein the parameter values of each pixel line i comprise the number of pixels being sampled, a first index value, and a second index value for the pixel line i;
• performing a texture coordinate mapping according to the parameter values of each pixel line i to obtain mapping texture coordinates of the pixel line i;
• configuring attributes of texture coordinates of each subdivided triangle on a sphere model based on the parameter values for each pixel line i;
• and
• mapping each pixel line i of the compressed texture image to a corresponding position on the sphere model based on the parameter values and the mapping texture coordinates for the pixel line i to generate the 360 degree panoramic video.