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US 11,455,708 B2Granted
Display apparatus and operating method thereof
AssigneeLG Electronics Inc.
InventorsHyomin Kim, Yeonoh Nam
Life of this patent
Estimating the term…
Abstract
A tone mapping apparatus includes a dynamic tone mapping module configured to generate a first tone mapping curve based on a luminance distribution histogram of input image data and generate first image data from the input image data using the first tone mapping curve, and a processor configured to generate an RGB distribution histogram, a detail region histogram and a high-luminance region histogram based on pixel information of the first image data, generate a second tone mapping curve using the RGB distribution histogram, the detail region histogram and the high-luminance region histogram and generate output image data from the first image data using the second tone mapping curve.
Claims17
A display apparatus comprising:
- a controller;
- and
- a display,
- wherein the controller is configured to:
- acquire input image data,
- generate a first tone mapping curve based on a luminance distribution histogram of the acquired input image data,
- generate first image data from the acquired input image data using the generated first tone mapping curve,
- generate a Red, Green, Blue (RGB) distribution histogram, a detail region histogram, and a high-luminance region histogram based on pixel information of the generated first image data,
- generate a second tone mapping curve using the generated RGB distribution histogram, the generated detail region histogram, and the generated high-luminance region histogram, and
- cause the display to display output image data using the generated second tone mapping curve, wherein the output image data is generated from the generated first image data, wherein the RGB distribution histogram is generated based on a luminance value of each pixel in an entire region of the generated first image data,
- wherein the detail region histogram is generated based on luminance values of pixels each having a detail degree greater than or equal to a predetermined detail reference value in the generated first image data, and
- wherein the high-luminance region histogram is generated based on luminance values of pixels greater than or equal to a predetermined luminance reference value in the generated first image data.
9 more elements
A tone mapping method of a display apparatus comprising:
- generating a first tone mapping curve based on a luminance distribution histogram of input image data;
- generating first image data from the input image data using the generated first tone mapping curve;
- generating a Red, Green, Blue (RGB) distribution histogram, a detail region histogram and a high-luminance region histogram based on pixel information of the generated first image data;
- generating a second tone mapping curve using the generated RGB distribution histogram, the generated detail region histogram, and the generated high-luminance region histogram;
- and
- display output image data using the generated second tone mapping curve, wherein the output image data is generated from the generated first image data, wherein the RGB distribution histogram is generated based on a luminance value of each pixel in an entire region of the generated first image data,
- wherein the detail region histogram is generated based on luminance values of pixels each having a detail degree greater than or equal to a predetermined detail reference value in the generated first image data, and
- wherein the high-luminance region histogram is generated based on luminance values of pixels greater than or equal to a predetermined luminance reference value in the generated first image data.
5 more elements
A recording medium having recorded thereon a tone mapping method, the tone mapping method comprising:
- generating a first tone mapping curve based on a luminance distribution histogram of input image data;
- generating first image data from the input image data using the generated first tone mapping curve;
- generating a Red, Green, Blue (RGB) distribution histogram, a detail region histogram and a high-luminance region histogram based on pixel information of the generated first image data;
- generating a second tone mapping curve using the generated RGB distribution histogram, the generated detail region histogram, and the generated high-luminance region histogram;
- and
- display output image data using the generated second tone mapping curve, wherein the output image data is generated from the generated first image data, wherein the RGB distribution histogram is generated based on a luminance value of each pixel in an entire region of the generated first image data,
- wherein the detail region histogram is generated based on luminance values of pixels each having a detail degree greater than or equal to a predetermined detail reference value in the generated first image data, and
- wherein the high-luminance region histogram is generated based on luminance values of pixels greater than or equal to a predetermined luminance reference value in the generated first image data.
5 more elements
Dependencies are inferred from the claim text.