Method for processing a raw image, and associated computer program product and processing device

A method for processing a raw image from a camera module, the raw image being representative of a scene acquired by a sensor of the camera module through an optical system of the camera module,

• the camera module being associated with an optical transfer function between the scene and the sensor.
• the method being implemented by computer and comprising the steps:
• receiving an enlargement instruction indicative of a portion of the raw image, strictly smaller than the raw image and forming an input image, to be enlarged;
• performing an initial calculation of an estimated image, by deconvoluting the optical transfer function from the input image;
• iteratively implementing a processing loop comprising:
• calculating a current simulated image based on the current estimated image and the optical transfer function;
• determining a cost function based on at least one of the current simulated image and the current estimated image;
• if a predetermined stopping criterion is reached, exiting the processing loop;
• otherwise, updating the estimated image based on the determined cost function;
• outputting a rendered image equal to the current estimated image.