Methods and systems for multistage post-rendering image transformation

An electronic device comprising:

• a transform generation module arranged to dynamically generate an image transformation between positions in a source space and corresponding positions in a destination space;
• a first memory arranged to receive and store transformation data;
• a transform data generation module arranged to:
• receive the image transformation from the transform generation module,
• generate first transformation data for a first sampling position by applying the image transformation generated by the transform generation module for the first sampling position,
• generate second transformation data for a second sampling position by applying the image transformation generated by the transform generation module for the second sampling position, and
• store the first and second transformation data in the first memory;
• a first image transformation stage arranged to:
• select the first and second transformation data for a first destination image position,
• calculate a first estimated source image position for the first destination image position based on the first and second transformation data selected by the first image transformation stage, and
• generate first data by performing a first operation using the calculated first estimated source image position;
• a second image transformation stage arranged to:
• select the first and second transformation data for the first destination image position,
• retrieve the selected first and second transformation data from the memory,
• recalculate the first estimated source image position for the first destination image position based on the first and second transformation data retrieved by the second image transformation stage, and
• generate first image data for the first destination image position using the recalculated first estimated source image position and the first data generated by the first rendering stage;
• and
• a post-rendering transformation module arranged to receive the first image data and generate a first transformed image based on the first image data.