Methods and non-transitory computer readable storage medium for spatial resampling towards machine vision

An apparatus for image data processing, comprising:

• a memory configured to store instructions;
• and
• one or more processors configured to execute the instructions to cause the apparatus to perform operations comprising:
• performing a plurality of convolutions on a down-sampled image data in YUV format, wherein performing the plurality of convolutions comprises:
• performing a first stage convolution on the down-sampled image data, wherein the first stage convolution comprises a first convolution and a second convolution provided in parallel;
• performing a second stage convolution on a channel-wise concatenation result of an output of the first convolution and an output of the second convolution;
• performing a third stage convolution on an output of the second stage convolution, wherein the third stage convolution comprises a fourth convolution and a fifth convolution provided in parallel;
• performing a bicubic interpolation on the down-sampled image data to obtain a bicubic interpolation result;
• and
• performing an element-wise addition to an output of third stage convolution and the bicubic interpolation result to obtain an up-sampled image data;
• wherein performing the element-wise addition to the output of third stage convolution and the bicubic interpolation result to obtain the up-sampled image data, further comprises:
• performing a first element-wise addition to an output of the fourth convolution and a first bicubic interpolation result of a Y component of the down-sampled image data to obtain a Y component of the up-sampled image data;
• and
• performing a second element-wise addition to an output of the fifth convolution and a second bicubic interpolation result of a channel-wise concatenation result of a U component and a V component of the down-sampled image data to obtain a channel-wise concatenation result of a U component and a V component of the up-sampled image data.

A non-transitory computer readable medium that stores a set of instructions that is executable by one or more processors of an apparatus to cause the apparatus to perform operations comprising:

• performing a plurality of convolutions on a down-sampled image data in YUV format, wherein performing the plurality of convolutions comprises:
• performing a first stage convolution on the down-sampled image data, wherein the first stage convolution comprises a first convolution and a second convolution provided in parallel;
• performing a second stage convolution on a channel-wise concatenation result of an output of the first convolution and an output of the second convolution;
• performing a third stage convolution on an output of the second stage convolution, wherein the third stage convolution comprises a fourth convolution and a fifth convolution provided in parallel;
• performing a bicubic interpolation on the down-sampled image data to obtain a bicubic interpolation result;
• and
• performing an element-wise addition to an output of third stage convolution and the bicubic interpolation result to obtain an up-sampled image data;
• wherein performing the element-wise addition to the output of third stage convolution and the bicubic interpolation result to obtain the up-sampled image data, further comprises:
• performing a first element-wise addition to an output of the fourth convolution and a first bicubic interpolation result of a Y component of the down-sampled image data to obtain a Y component of the up-sampled image data;
• and
• performing a second element-wise addition to an output of the fifth convolution and a second bicubic interpolation result of a channel-wise concatenation result of a U component and a V component of the down-sampled image data to obtain a channel-wise concatenation result of a U component and a V component of the up-sampled image data.