Device, system and method for enhancing one or more of high contrast regions and text regions in projected images

A method comprising:

• receiving, at a device, an input image from a video stream;
• applying, at the device, a high-contrast sharpening filter to the input image to produce a high-contrast sharpened image, the high-contrast sharpening filter configured to sharpen high-contrast regions in images, the high-contrast regions including text regions when present in the images;
• applying, at the device, a background sharpening filter to the input image to produce a background sharpened image, the background sharpening filter configured to sharpen other regions of the images different from the high-contrast regions, the background sharpening filter further configured to apply less sharpening to the images than the high-contrast sharpening filter;
• determining, at the device, using at least a high-contrast detector, a motion detector and one or more of the input image and previous images from the video stream, one or more masks that select stationary high-contrast regions of the input image, the stationary high-contrast regions including stationary text-regions when present in the input image;
• determining, at the device, using at least the one or more masks, a background mask that selects remaining regions of the input image different from respective regions of the input image selected by the one or more masks;
• applying, at the device, the one or more masks to the high-contrast sharpened image to select the stationary high-contrast regions from the high-contrast sharpened image;
• applying, at the device, the background mask to the background sharpened image to select the remaining regions from the background sharpened image;
• combining, at the device, the stationary high-contrast regions from the high-contrast sharpened image and the remaining regions from the background sharpened image to produce a combined enhanced image;
• and
• controlling, at the device, at least one projector to project the combined enhanced image.

A non-transitory computer-readable medium storing a computer program, wherein execution of the computer program is for:

• receiving, at a device, an input image from a video stream;
• applying, at the device, a high-contrast sharpening filter to the input image to produce a high-contrast sharpened image, the high-contrast sharpening filter configured to sharpen high-contrast regions in images, the high-contrast regions including text regions when present in the images;
• applying, at the device, a background sharpening filter to the input image to produce a background sharpened image, the background sharpening filter configured to sharpen other regions of the images different from the high-contrast regions, the background sharpening filter further configured to apply less sharpening to the images than the high-contrast sharpening filter;
• determining, at the device, using at least a high-contrast detector, a motion detector and one or more of the input image and previous images from the video stream, one or more masks that select stationary high-contrast regions of the input image, the stationary high-contrast regions including stationary text-regions when present in the input image;
• determining, at the device, using at least the one or more masks, a background mask that selects remaining regions of the input image different from respective regions of the input image selected by the one or more masks;
• applying, at the device, the one or more masks to the high-contrast sharpened image to select the stationary high-contrast regions from the high-contrast sharpened image;
• applying, at the device, the background mask to the background sharpened image to select the remaining regions from the background sharpened image;
• combining, at the device, the stationary high-contrast regions from the high-contrast sharpened image and the remaining regions from the background sharpened image to produce a combined enhanced image;
• and
• controlling, at the device, at least one projector to project the combined enhanced image.