Image processing method and apparatus, integrated circuitry and recording medium

Image processing method and apparatus, integrated circuitry and recording medium

Image processing comprising receiving a first HDR image signal 205 representing a portion of a captured image with a first dynamic range and generating therefrom a second SDR image signal 203 having a lower dynamic range than the first high dynamic range. The second image is generated by applying on...

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Hauptverfasser: Daniel Luke Hooper, Robert Mark Stefan Porter, Clive Henry Gillard
Format: Patent
Sprache:eng
Schlagworte:
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
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creator Daniel Luke Hooper
Robert Mark Stefan Porter
Clive Henry Gillard
description Image processing comprising receiving a first HDR image signal 205 representing a portion of a captured image with a first dynamic range and generating therefrom a second SDR image signal 203 having a lower dynamic range than the first high dynamic range. The second image is generated by applying one of: a first gain to increase the brightness value of each pixel in the first image having a brightness or luminance value less than a first threshold brightness value; and a second, negative, gain to decrease the brightness value of each pixel having a brightness value greater than a second threshold. After the application of first or second gains, converting 316 the resulting signal such that the brightness value of each pixel in the first image becomes represented in a second format with a lower dynamic range. Preferably, applying a gain involves assigning each pixel with a mask value depending on whether it is above or below a threshold 306, applying a low pass filter 310 to blur the resultant mask image and calculating a gain value 314 to be applied to each pixel based on the value of the corresponding pixel in the filtered mask.
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subjects CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
title Image processing method and apparatus, integrated circuitry and recording medium
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