WO2019029294A1 - 图像显示方法、终端及计算机可读存储介质 - Google Patents

图像显示方法、终端及计算机可读存储介质 Download PDF

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WO2019029294A1
WO2019029294A1 PCT/CN2018/093474 CN2018093474W WO2019029294A1 WO 2019029294 A1 WO2019029294 A1 WO 2019029294A1 CN 2018093474 W CN2018093474 W CN 2018093474W WO 2019029294 A1 WO2019029294 A1 WO 2019029294A1
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data
sdr
hdr
image
image display
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PCT/CN2018/093474
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English (en)
French (fr)
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张晓东
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深圳Tcl新技术有限公司
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    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T5/00Image enhancement or restoration
    • G06T5/90Dynamic range modification of images or parts thereof
    • G06T5/92Dynamic range modification of images or parts thereof based on global image properties
    • GPHYSICS
    • G06COMPUTING; CALCULATING OR COUNTING
    • G06TIMAGE DATA PROCESSING OR GENERATION, IN GENERAL
    • G06T2207/00Indexing scheme for image analysis or image enhancement
    • G06T2207/20Special algorithmic details
    • G06T2207/20172Image enhancement details
    • G06T2207/20208High dynamic range [HDR] image processing

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  • the present application relates to the field of image processing technologies, and in particular, to an image display method, a terminal, and a computer readable storage medium.
  • Standard dynamic range SDR Standard dynamic range SDR (Standard-Dynamic Range), derived from the era of CRT display, its standard brightness is 100cd / m 2 , the color space used is BT709 (high definition) or BT601 (standard definition), with BT1886 (gamma) 8bit quantization coding .
  • the current display devices such as LCD and OLED have adopted the high dynamic range HDR (High Dynamic Range) display technology, which uses the color space of BT2020, and the color gamut range is greatly expanded. The brightness has far exceeded that of CRT devices.
  • the SDR content recorded by the BT1886 can only be reproduced on the low-brightness display of about 100cd/m 2 such as CRT, so that the original content can be correctly reproduced, thereby recreating the intention of the director in the editing room.
  • the SDR program produced at 100 cd/m 2 is displayed on a 1000 cd/m HDR display of 500 cd/m 2 or higher, the brightness thereof is excessively enlarged, and the user feels that the content of the screen is dazzling, and the viewing is uncomfortable and lowered. User experience.
  • the main purpose of the present application is to provide an image display method, a terminal, and a computer readable storage medium, aiming at solving the technical problem that the SDR image content is too bright when displayed on an HDR display.
  • the present application provides an image display method, which is applied to an image display terminal, and the image display method includes the following steps:
  • the step of acquiring the standard dynamic range SDR data, and performing the encoding and restoring process on the SDR data, and obtaining the original linear data corresponding to the SDR data includes:
  • the normalized data is linearly restored according to the gamma characteristic or the electro-optical conversion EOTF characteristic of the SDR display system, and the original linear data corresponding to the SDR data is obtained.
  • the step of performing gamma preset adjustment on the non-linear data, obtaining HDR data, and displaying a corresponding image according to the HDR data includes:
  • a corresponding image is displayed based on the HDR data.
  • the method further includes:
  • the HDR data is adjusted according to the brightness manual adjustment command to adjust the brightness of the currently displayed image, and the preset adjustment factor is adjusted according to the adjusted HDR data.
  • the method further includes:
  • the image corresponding to the SDR data and the image corresponding to the HDR data are simultaneously displayed in a preset display rule in the same interface.
  • the present application further provides an image display terminal including a processor, a memory, and an image display program stored on the memory and executable by the processor, wherein the image display terminal The following steps are implemented when the image display program is executed by the processor:
  • the step of acquiring the standard dynamic range SDR data, and performing the encoding and restoring process on the SDR data, and obtaining the original linear data corresponding to the SDR data includes:
  • the normalized data is linearly restored according to the gamma characteristic or the electro-optical conversion EOTF characteristic of the SDR display system, and the original linear data corresponding to the SDR data is obtained.
  • the step of performing gamma preset adjustment on the non-linear data, obtaining HDR data, and displaying a corresponding image according to the HDR data includes:
  • a corresponding image is displayed based on the HDR data.
  • the HDR data is adjusted according to the brightness manual adjustment command to adjust the brightness of the currently displayed image, and the preset adjustment factor is adjusted according to the adjusted HDR data.
  • the image corresponding to the SDR data and the image corresponding to the HDR data are simultaneously displayed in a preset display rule in the same interface.
  • the present application further provides a computer readable storage medium having an image display program stored thereon, and when the image display program is executed by a processor, the following steps are implemented:
  • the step of acquiring the standard dynamic range SDR data, and performing the encoding and restoring process on the SDR data, and obtaining the original linear data corresponding to the SDR data includes:
  • the normalized data is linearly restored according to the gamma characteristic or the electro-optical conversion EOTF characteristic of the SDR display system, and the original linear data corresponding to the SDR data is obtained.
  • the step of performing gamma preset adjustment on the non-linear data, obtaining HDR data, and displaying a corresponding image according to the HDR data includes:
  • a corresponding image is displayed based on the HDR data.
  • the HDR data is adjusted according to the brightness manual adjustment command to adjust the brightness of the currently displayed image, and the preset adjustment factor is adjusted according to the adjusted HDR data.
  • the image corresponding to the SDR data and the image corresponding to the HDR data are simultaneously displayed in a preset display rule in the same interface.
  • the present application obtains standard dynamic range SDR data, and performs encoding and restoration processing on the SDR data to obtain original linear data corresponding to the SDR data; and dynamically dynamically transforms the original linear data according to peak brightness of the image display terminal.
  • Range HDR conversion obtaining nonlinear data; performing gamma preset adjustment on the nonlinear data, obtaining HDR data, and displaying a corresponding image according to the HDR data.
  • the present application restores the SDR original content to the original linear data, and then remaps the original data (MAPPING) to obtain image data matching the target HDR display, so that the SDR content can be performed on the HDR display with reasonable brightness. Display and present high dynamic features of HDR content to enhance the user experience.
  • FIG. 1 is a schematic structural diagram of hardware of an image display terminal according to an embodiment of the present application.
  • FIG. 2 is a schematic flow chart of a first embodiment of an image display method according to the present application.
  • FIG. 3 is a schematic diagram of a refinement process of performing gamma preset adjustment on the nonlinear data, obtaining HDR data, and performing image display according to the HDR data;
  • FIG. 4 is a schematic flow chart of a second embodiment of an image display method according to the present application.
  • the main idea of the solution in the embodiment of the present application is: acquiring standard dynamic range SDR data, and performing encoding and restoration processing on the SDR data to obtain original linear data corresponding to the SDR data; according to the peak brightness of the high dynamic range HDR display
  • the original linear data is subjected to HDR conversion to obtain nonlinear data; gamma preset adjustment is performed on the nonlinear data to obtain HDR data, and image display is performed according to the HDR data.
  • FIG. 1 is a schematic structural diagram of hardware of an image display terminal according to an embodiment of the present application.
  • the image display terminal in the embodiment of the present application may be a smart device, a smart phone, a tablet computer, a portable computer, or the like, and has a display device with a display function.
  • the image display terminal of the embodiment of the present application may include a processor 1001 (eg, a CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005.
  • the communication bus 1002 is configured to implement connection communication between the components; the user interface 1003 includes a display, an input unit such as a keyboard; the network interface 1004 optionally includes a standard wired interface, and wireless An interface (such as a WI-FI interface); the memory 1005 may be a high-speed RAM memory, or may be a non-volatile memory, such as a disk storage. The memory 1005 may alternatively be a storage independent of the processor 1001. Device.
  • the image display terminal may further include a camera, an RF (Radio Frequency) circuit, a sensor, an audio circuit, a WiFi module, and the like.
  • sensors such as light sensors, motion sensors, and other sensors.
  • the light sensor may include an ambient light sensor and a proximity sensor, wherein the ambient light sensor can adjust the brightness of the display according to the brightness of the ambient light, and the proximity sensor can close the display and/or according to the distance between the photosensitive device and the reference object.
  • the gravity acceleration sensor can detect the magnitude of acceleration in each direction (usually three axes). When it is stationary, it can detect the magnitude and direction of gravity.
  • the image display terminal can also be equipped with other sensors such as gyroscope, barometer, hygrometer, thermometer, infrared sensor, etc. No longer.
  • FIG. 1 does not constitute a limitation on the image display terminal of the present application, and may include more or less components than those illustrated, or combine some components, or Different parts are arranged.
  • the memory 1005 as a computer storage medium in FIG. 1 can include an operating system, a network communication module, and an image display program.
  • the network communication module is mainly used to connect to the server for data communication with the server; and the processor 1001 can call the image display program stored in the memory 1005 and perform the following operations:
  • the step of acquiring the standard dynamic range SDR data, and performing the encoding and restoring process on the SDR data, and obtaining the original linear data corresponding to the SDR data includes:
  • the normalized data is linearly restored according to the gamma characteristic or the electro-optical conversion EOTF characteristic of the SDR display system, and the original linear data corresponding to the SDR data is obtained.
  • the step of performing gamma preset adjustment on the nonlinear data, obtaining HDR data, and displaying a corresponding image according to the HDR data includes:
  • a corresponding image is displayed based on the HDR data.
  • the HDR data is adjusted according to the brightness manual adjustment command to adjust the brightness of the currently displayed image, and the preset adjustment factor is adjusted according to the adjusted HDR data.
  • the image corresponding to the SDR data and the image corresponding to the HDR data are simultaneously displayed in a preset display rule in the same interface.
  • FIG. 2 is a schematic flowchart of a first embodiment of an image display method according to the present application.
  • the image display method includes the following steps:
  • Step S10 Obtain standard dynamic range SDR data, and perform encoding and restoration processing on the SDR data to obtain original linear data corresponding to the SDR data.
  • Standard dynamic range SDR Standard dynamic range SDR (Standard-Dynamic Range), derived from the era of CRT display, its standard brightness is 100cd / m 2 , the color space used is BT709 (high definition) or BT601 (standard definition), with BT1886 (gamma) 8bit quantization coding .
  • the current display devices such as LCD and OLED have adopted the high dynamic range HDR (High Dynamic Range) display technology, which uses the color space of BT2020, and the color gamut range is greatly expanded. The brightness has far exceeded that of CRT devices.
  • the content of the SDR is based on 100 cd/m2, so only on the SDR display of 100 cd/m 2 can the picture state of the director end be faithfully reproduced.
  • the current SDR uses EOTF (Electro-Optical Conversion Characteristics) as BT1886, which is a relative quantization coding system. Therefore, the same 100 cd/m 2 content is displayed on the HDR display of 1000 cd/m 2 with the same EOTF, and reproduced.
  • the brightness is proportionally linearly amplified, ie, the original SDR content pixel of 100 cd/m 2 is displayed as 1000 cd/m 2 on a 1000 cd/m 2 display. Therefore, when the SDR content with the lower average brightness is displayed on the highlighted 1000 cd/m display, the average brightness is too high, which causes the user to feel uncomfortable and glare.
  • an image display method is proposed in the embodiment to solve the technical problem that the brightness of the SDR image content is too high when displayed on the HDR display.
  • the image display method in this embodiment is applied to an image display terminal
  • the image display terminal may be a smart device, a smart phone, a tablet computer, a portable computer, or the like, and has a terminal device with a display and playback function.
  • the description will be made with a smart TV having an HDR display.
  • the smart TV will acquire the program data corresponding to the program through the network; the program data is data in the form of a standard dynamic range SDR, and the smart TV is a display screen with a high dynamic range HDR.
  • the smart TV will restore the SDR data. Since the current SDR display system uses the original linear data L to obtain SDR data through BT1886 (gamma) 8-bit quantization encoding, according to this situation, the SDR data can be encoded and restored. , thereby obtaining the original linear data before the SDR data is quantized and encoded.
  • the SDR data is first normalized to obtain normalized data; and the normalized data is linearly restored to obtain the original corresponding to the SDR data.
  • Linear data Normalization is for the convenience of the subsequent data processing, and secondly, the convergence of the normal program is accelerated, so the data is normalized and limited to a certain range.
  • the normalization process in this embodiment is performed according to the bit depth of the SDR image signal, and is performed by the following formula:
  • N 1 S SDR /(2 n -1).
  • N 1 is normalized data
  • S SDR is SDR data
  • n is an image signal bit bit depth, and usually the SDR image signal bit depth is 8 bits, that is, n is 8.
  • the SDR data S SDR data value is between 0 and 255; after normalization, the resulting normalized data N 1 data value is between 0 and 1.
  • the normalized data is subjected to a linear reduction process to restore the linear data before the SDR signal is quantized.
  • the reduction process in this embodiment is performed based on the gamma characteristic of the SDR display system or the electro-optic conversion EOTF characteristic, and is performed by the following formula:
  • L is the original linear data corresponding to the SDR data
  • N 1 is the normalized data
  • is the gamma characteristic or the electro-optical conversion EOTF characteristic of the SDR display system.
  • Step S20 performing high dynamic range HDR conversion on the original linear data according to the peak brightness of the image display terminal, to obtain nonlinear data
  • the original linear data L when the original linear data of the program is restored, the original linear data L can be mapped to obtain data suitable for the HDR display of the smart TV.
  • the biggest feature of the HDR technology is that it has a high dynamic range of brightness. Therefore, in the present embodiment, when the original linear data is obtained, the brightness attribute value of the HDR display of the image display terminal is obtained, and the original linearity is obtained according to the peak brightness.
  • the data is HDR converted and converted into non-linear data that matches the HDR display (ie, the original data corresponding to the SDR data is re-encoded).
  • N L ⁇ 1 .
  • N is the nonlinear data of HDR conversion
  • L is the normalized data
  • ⁇ 1 1+alog 10 (Y p /1000)
  • Y p is the peak brightness of the display screen (cd/m 2 )
  • a is 0 to A constant between 1.
  • Step S30 performing gamma preset adjustment on the nonlinear data, obtaining HDR data, and performing image display according to the HDR data.
  • the non-linear data when nonlinear data is obtained, the non-linear data is not immediately displayed; instead, the gamma preset adjustment is performed on the nonlinear data to cancel the gamma characteristic of the display.
  • the relationship between the input energy and the color brightness recorded in the image file is linear; however, since the conventional CRT display (SDR) uses an electronic picture tube, it controls the current. The size controls the brightness on the display screen, but the relationship between brightness and current is not linear, which causes the image displayed by the CRT display to be inconsistent with the actual image captured by the camera. To correct this difference, the camera automatically saves the image. Perform a gamma correction on the data.
  • S HDR is HDR data
  • m is output image signal bit depth
  • N is nonlinear data
  • is gamma characteristic or EOTF characteristic of SDR display system.
  • the HDR data obtained by the above process has its corresponding EOTF characteristic curve changed.
  • the corresponding image has a lower average brightness level than the image corresponding to the SDR.
  • the smart TV displays the corresponding image according to the HDR data for the user to watch.
  • the image display method in this embodiment is implemented by a smart TV.
  • the image display method can also be implemented by other image display devices.
  • the device may also be an external device independent of the television, or may be an internal device installed in the television, the device having the above-mentioned image display function of the television, of course, the device may also add other functions correspondingly, thereby achieving the above The steps of the image display method.
  • the standard dynamic range SDR data is obtained, and the SDR data is subjected to encoding and restoration processing to obtain original linear data corresponding to the SDR data; and the original linear data is compared according to the peak brightness of the image display terminal.
  • the original content of the SDR is restored to the original linear data, and then the original data is remapped (MAPPING) to obtain image data matching the target HDR display, so that the SDR content can be displayed on the HDR display with reasonable brightness. It also presents the high dynamic features of HDR content to enhance the user experience.
  • FIG. 3 is a schematic diagram of a refinement process of performing gamma preset adjustment on the nonlinear data, obtaining HDR data, and performing image display according to the HDR data.
  • step S30 includes:
  • Step S31 performing gamma preset on the nonlinear data according to a gamma characteristic or an electro-optical conversion EOTF characteristic of the SDR display system, and adjusting the nonlinear data according to a preset adjustment factor to obtain HDR data;
  • Step S32 displaying a corresponding image according to the HDR data.
  • the non-linear data when nonlinear data is obtained, the non-linear data is not immediately displayed; instead, the gamma preset adjustment is performed on the nonlinear data to cancel the gamma characteristic of the display.
  • the process of performing gamma preset processing it can be performed by the following formula:
  • S HDR is HDR data
  • m is output image signal bit depth
  • N is nonlinear data
  • is gamma characteristic or EOTF characteristic of SDR display system.
  • Y p is the peak luminance (cd/m 2 ) of the display screen, and a is a constant between 0 and 1.
  • an adjustment factor may be added to the formula of the gamma preset processing to adjust according to the actual situation, so as to adjust the HDR data according to the display attributes of different displays.
  • the specific adjustment process can adopt the following formula:
  • S HDR is HDR data
  • m is the output image signal bit depth
  • N is nonlinear data
  • is the gamma characteristic or EOTF characteristic of the SDR system
  • is a preset adjustment factor, and the data value is between 0 and 1.
  • the preset adjustment factor can be set by the user or the manufacturer at the factory.
  • the HDR data obtained by the above process has its corresponding EOTF characteristic curve changed.
  • the average brightness level of the corresponding image is reduced compared to the image corresponding to the SDR.
  • the HDR data is further adapted by adjusting the adjustment factor ⁇ .
  • the smart TV displays the corresponding image according to the HDR data for the user to watch.
  • the smart TV displays the corresponding image according to the HDR data
  • the user can manually adjust the display brightness.
  • the user can select a corresponding brightness adjustment option through a remote controller or a button on the smart TV body to trigger a brightness manual adjustment command; the smart TV manually adjusts according to the brightness when receiving a user-triggered brightness manual adjustment command.
  • the HDR data obtained by N ⁇ / ⁇ is compared, and the difference between the two is determined, and then the preset adjustment factor ( ⁇ ) is automatically adjusted and corrected according to the difference, so that the adjustment algorithm of the smart TV is more accurate, according to the adjustment.
  • the data converted by the algorithm and the displayed image can better meet the actual viewing needs of the user and improve the user experience.
  • FIG. 4 is a schematic flowchart diagram of a second embodiment of an image display method according to the present application.
  • step S30 the method further includes:
  • step S40 when the user-triggered comparison display instruction is received, the image corresponding to the SDR data and the image corresponding to the HDR data are simultaneously displayed in a preset display rule in the same interface.
  • the smart TV when the HDR data is obtained, the smart TV can display the corresponding image according to the HDR data, and the smart TV does not immediately delete the original SDR data; the user can also trigger the corresponding instruction during the viewing process.
  • the smart TV can simultaneously display the image corresponding to the SDR data and the image corresponding to the HDR data in the same interface with the preset display rule, thereby more intuitively comparing the SDR image content with the HDR image content.
  • the user can select a corresponding contrast display option by using a button on the remote controller or the smart TV body to trigger a comparison display instruction; when the smart TV receives the contrast display option triggered by the user, the original SDR data is found in the memory.
  • the preset display rule includes a display position
  • the user can set the display position of the two images, for example, the display area of the display screen
  • the average is divided into left and right parts, the left side is used to display the image content corresponding to the SDR data, and the right side is used to display the image content corresponding to the HDR data; of course, the display area can be equally divided into upper and lower parts, and the upper side is used to display the image corresponding to the SDR data.
  • the content is used to display the image content corresponding to the HDR data; of course, it can also be other display modes, which is convenient for the user to compare the SDR image content with the HDR image content, and further adjust the brightness of the image according to the comparison result.
  • the application also provides a computer readable storage medium.
  • An image display program is stored on the computer readable storage medium of the present application, and the image display program is executed by the processor to implement the steps of the image display method as described above.
  • the technical solution of the present application which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM as described above). , a disk, an optical disk, including a number of instructions for causing a terminal device (which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.) to perform the methods described in the various embodiments of the present application.
  • a terminal device which may be a mobile phone, a computer, a server, an air conditioner, or a network device, etc.

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Abstract

本申请提供一种图像显示方法,该方法包括:获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据;根据图像显示终端的峰值亮度对所述原始线性数据进行高动态范围HDR转换,获得非线性数据;对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像。本申请还提供一种图像显示终端和计算机可读存储介质。

Description

图像显示方法、终端及计算机可读存储介质
本申请要求于2017年8月9日提交中国专利局、申请号为201710679863.X、发明名称为“图像显示方法、终端及计算机可读存储介质”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本申请涉及图像处理技术领域,尤其涉及一种图像显示方法、终端及计算机可读存储介质。
背景技术
标准动态范围SDR(Standard-Dynamic Range),源于CRT显示器时代,其标准亮度是100cd/m 2,采用的色彩空间为BT709(高清)或BT601(标清),以BT1886(伽马)8bit量化编码。而随着显示技术不断发展和更新换代,目前的LCD、OLED等新型显示器件,开始采用了高动态范围HDR(High Dynamic Range)的显示技术,其采用BT2020的色彩空间,色域范围大大拓展,亮度已经远远超过了的CRT器件。
但是,以100cd/m 2为基准,采用BT1886采集编录的SDR内容,只有在CRT等100cd/m 2左右低亮显示器上显示,才能正确重现原始内容,从而重现编辑室中导演的意图。以100cd/m 2制作的SDR节目,在500cd/m 2或更高的1000cd/m HDR显示器上显示时,其亮度会被过度放大,用户会觉得画面内容显得耀眼,观看时不舒服,降低了用户的体验。
发明内容
本申请的主要目的在于提出一种图像显示方法、终端及计算机可读存储介质,旨在解决SDR图像内容在HDR显示器上显示时亮度过高的技术问题。
为实现上述目的,本申请提供一种图像显示方法,所述图像显示方法应用于图像显示终端,所述图像显示方法包括以下步骤:
获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据;
根据所述图像显示终端的峰值亮度对所述原始线性数据进行高动态范围HDR转换,获得非线性数据;
对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像。
可选地,所述获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据的步骤包括:
获取SDR数据,并根据SDR图像信号位深对所述SDR数据进行归一化处理,获得归一化数据;
根据SDR显示系统的伽马特性或电光转换EOTF特性对所述归一化数据进行线性还原处理,获得所述SDR数据对应的原始线性数据。
可选地,所述对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像的步骤包括:
根据SDR显示系统的伽马特性或电光转换EOTF特性对所述非线性数据进行伽马预置,并根据预设调整因子对所述非线性数据进行调整,获得HDR数据;
根据所述HDR数据显示对应的图像。
可选地,对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像的步骤之后,还包括:
在接收到用户触发的亮度手动调整指令时,根据所述亮度手动调整指令调整所述HDR数据,以调整当前显示图像的亮度,并根据调整后的HDR数据调整所述预设调整因子。
可选地,所述对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像的步骤之后,还包括:
在接收到用户触发的对比显示指令时,在同一界面中以预设显示规则同时显示所述SDR数据对应的图像和所述HDR数据对应的图像。
此外,为实现上述目的,本申请还提供一种图像显示终端,所述图像显示终端包括处理器、存储器及存储在所述存储器上并可被所述处理器执行的图像显示程序,其中所述图像显示程序被所述处理器执行时实现以下步骤:
获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据;
根据所述图像显示终端的峰值亮度对所述原始线性数据进行高动态范围HDR转换,获得非线性数据;
对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像。
可选地,所述获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据的步骤包括:
获取SDR数据,并根据SDR图像信号位深对所述SDR数据进行归一化处理,获得归一化数据;
根据SDR显示系统的伽马特性或电光转换EOTF特性对所述归一化数据进行线性还原处理,获得所述SDR数据对应的原始线性数据。
可选地,所述对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像的步骤包括:
根据SDR显示系统的伽马特性或电光转换EOTF特性对所述非线性数据进行伽马预置,并根据预设调整因子对所述非线性数据进行调整,获得HDR数据;
根据所述HDR数据显示对应的图像。
可选地,所述图像显示程序被所述处理器执行时,还实现以下步骤:
在接收到用户触发的亮度手动调整指令时,根据所述亮度手动调整指令调整所述HDR数据,以调整当前显示图像的亮度,并根据调整后的HDR数据调整所述预设调整因子。
可选地,所述图像显示程序被所述处理器执行时,还实现以下步骤:
在接收到用户触发的对比显示指令时,在同一界面中以预设显示规则同时显示所述SDR数据对应的图像和所述HDR数据对应的图像。
此外,为实现上述目的,本申请还提供一种计算机可读存储介质,所述计算机可读存储介质上存储有图像显示程序,所述图像显示程序被处理器执行时实现以下步骤:
获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据;
根据所述图像显示终端的峰值亮度对所述原始线性数据进行高动态范围HDR转换,获得非线性数据;
对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像。
可选地,所述获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据的步骤包括:
获取SDR数据,并根据SDR图像信号位深对所述SDR数据进行归一化处理,获得归一化数据;
根据SDR显示系统的伽马特性或电光转换EOTF特性对所述归一化数据进行线性还原处理,获得所述SDR数据对应的原始线性数据。
可选地,所述对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像的步骤包括:
根据SDR显示系统的伽马特性或电光转换EOTF特性对所述非线性数据进行伽马预置,并根据预设调整因子对所述非线性数据进行调整,获得HDR数据;
根据所述HDR数据显示对应的图像。
可选地,所述图像显示程序被处理器执行时,还实现以下步骤:
在接收到用户触发的亮度手动调整指令时,根据所述亮度手动调整指令调整所述HDR数据,以调整当前显示图像的亮度,并根据调整后的HDR数据调整所述预设调整因子。
可选地,所述图像显示程序被处理器执行时,还实现以下步骤:
在接收到用户触发的对比显示指令时,在同一界面中以预设显示规则同时显示所述SDR数据对应的图像和所述HDR数据对应的图像。
本申请通过获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据;根据所述图像显示终端的峰值亮度对所述原始线性数据进行高动态范围HDR转换,获得非线性数据;对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像。通过以上方式,本申请将SDR原始内容还原成原始线性数据,再对原始数据进行重新映射(MAPPING),得到与目标HDR显示器相匹配图像数据,使得SDR内容能在HDR显示器上以合理的亮度进行显示,并呈现出HDR内容高动态的特色,提高用户的体验。
附图说明
图1为本申请实施例方案涉及的图像显示终端的硬件结构示意图;
图2为本申请图像显示方法第一实施例的流程示意图;
图3为图2所述对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据进行图像显示的细化流程示意图;
图4为本申请图像显示方法第二实施例的流程示意图。
本申请目的的实现、功能特点及优点将结合实施例,参照附图做进一步说明。
具体实施方式
应当理解,此处所描述的具体实施例仅仅用以解释本申请,并不用于限定本申请。
本申请实施例方案的主要思路是:获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据;根据高动态范围HDR显示器的峰值亮度对所述原始线性数据进行HDR转换,获得非线性数据;对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据进行图像显示。
参照图1,图1为本申请实施例方案涉及的图像显示终端的硬件结构示意图。
本申请实施例中的图像显示终端可以是智能电视、智能手机、平板电脑、便携计算机等具备HDR显示屏、并具有显示播放功能的终端设备。如图1所示,本申请实施例的图像显示终端可以包括处理器1001(例如CPU),通信总线1002,用户接口1003,网络接口1004,存储器1005。其中,通信总线1002用于实现这些组件之间的连接通信;用户接口1003包括可以包括显示屏(Display)、输入单元比如键盘(Keyboard);网络接口1004可选的可以包括标准的有线接口、无线接口(如WI-FI接口);存储器1005可以是高速RAM存储器,也可以是稳定的存储器(non-volatile memory),例如磁盘存储器,存储器1005可选的还可以是独立于前述处理器1001的存储装置。
可选的,图像显示终端还可以包括摄像头、RF(Radio Frequency,射频)电路,传感器、音频电路、WiFi模块等等。其中,传感器比如光传感器、运动传感器以及其他传感器。具体的,光传感器可包括环境光传感器及接近传感器,其中,环境光传感器可根据环境光线的明暗来调节显示屏的亮度,接近传感器可根据感光设备与参照物的距离,关闭显示屏和/或背光。作为运动传感器的一种,重力加速度传感器可检测各个方向上(一般为三轴)加速度的大小,静止时可检测出重力的大小及方向,可用于识别终端姿态的应用(比如横竖屏切换、相关游戏、磁力计姿态校准)、振动识别相关功能(比如计步器、敲击)等;当然,图像显示终端还可配置陀螺仪、气压计、湿度计、温 度计、红外线传感器等其他传感器,在此不再赘述。
本领域技术人员可以理解,图1中示出的图像显示终端的硬件结构并不构成对本申请图像显示终端的限定,可以包括比图示更多或更少的部件,或者组合某些部件,或者不同的部件布置。
继续参照图1,图1中作为一种计算机存储介质的存储器1005可以包括操作系统、网络通信模块以及图像显示程序。
在图1所示的终端中,网络通信模块主要用于连接服务器,与服务器进行数据通信;而处理器1001可以调用存储器1005中存储的图像显示程序,并执行以下操作:
获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据;
根据所述图像显示终端的峰值亮度对所述原始线性数据进行高动态范围HDR转换,获得非线性数据;
对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像。
进一步的,所述获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据的步骤包括:
获取SDR数据,并根据SDR图像信号位深对所述SDR数据进行归一化处理,获得归一化数据;
根据SDR显示系统的伽马特性或电光转换EOTF特性对所述归一化数据进行线性还原处理,获得所述SDR数据对应的原始线性数据。
进一步的,所述对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像的步骤包括:
根据SDR显示系统的伽马特性或电光转换EOTF特性对所述非线性数据进行伽马预置,并根据预设调整因子对所述非线性数据进行调整,获得HDR数据;
根据所述HDR数据显示对应的图像。
进一步的,所述图像显示程序被所述处理器执行时,还实现以下步骤:
在接收到用户触发的亮度手动调整指令时,根据所述亮度手动调整指令调整所述HDR数据,以调整当前显示图像的亮度,并根据调整后的HDR数 据调整所述预设调整因子。
进一步的,所述图像显示程序被所述处理器执行时,还实现以下步骤:
在接收到用户触发的对比显示指令时,在同一界面中以预设显示规则同时显示所述SDR数据对应的图像和所述HDR数据对应的图像。
基于上述图像显示终端的硬件结构,提出本申请图像显示方法的各个实施例。
参照图2,图2为本申请图像显示方法第一实施例的流程示意图。
本实施例中,所述图像显示方法包括以下步骤:
步骤S10,获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据;
标准动态范围SDR(Standard-Dynamic Range),源于CRT显示器时代,其标准亮度是100cd/m 2,采用的色彩空间为BT709(高清)或BT601(标清),以BT1886(伽马)8bit量化编码。而随着显示技术不断发展和更新换代,目前的LCD、OLED等新型显示器件,开始采用了高动态范围HDR(High Dynamic Range)的显示技术,其采用BT2020的色彩空间,色域范围大大拓展,亮度已经远远超过了的CRT器件。SDR的内容是基于100cd/m2制作的,因此只有在100cd/m 2的SDR显示器上,才能忠实重现导演端的画面状态。而现行的SDR采用的EOTF(电光转换特性)为BT1886,是相对的量化编码系统,因此同样的100cd/m 2制作的内容,用同样的EOTF在1000cd/m 2的HDR显示器上显示,重现亮度则被成比例线性放大,即:原本100cd/m 2的原始SDR内容像素点,在1000cd/m 2显示器上则显示为1000cd/m 2。因此原本平均亮度较低的SDR内容,在高亮的1000cd/m显示器上显示时,就会因平均亮度过高,给用户造成不舒服、刺眼的感觉。
基于上述原因,本实施例中提出一种图像显示方法,以解决SDR图像内容在HDR显示器上显示时亮度过高的技术问题。
具体的,本实施例中的图像显示方法应用于图像显示终端,该图像显示终端可以是智能电视、智能手机、平板电脑、便携计算机等具备HDR显示屏、并具有显示播放功能的终端设备,本实施例中以具有HDR显示屏的智能电视进行说明。用户在打开智能电视观看某个节目时,此时智能电视将通过网络获取该节目对应的节目数据;该节目数据是标准动态范围SDR形式的数据, 而智能电视是高动态范围HDR的显示屏,若直接根据该SDR数据进行图像显示,则会出现亮度过高的问题;因此需要将该节目的SDR数据转化成对应的HDR数据,再根据HDR数据进行图像显示。此时智能电视将会对SDR数据进行还原,由于现行的SDR显示系统都是将原始线性数据L通过BT1886(伽马)8bit量化编码得到SDR数据,根据这一情况,可对SDR数据进行编码还原,从而得到该SDR数据量化编码前的原始线性数据。
进一步的,本实施例中对SDR数据进行编码还原过程中,首先是对SDR数据进行归一化处理,得到归一化数据;再对归一化数据进行线性还原处理,得到SDR数据对应的原始线性数据。其中归一化是为了后面数据处理的方便,其次是保正程序运行时收敛加快,因此将数据进行归一化处理,将其限制在需要的一定范围内。
本实施例中的归一化过程,是根据SDR图像信号位深进行的,采用如下公式进行:
N 1=S SDR/(2 n-1)。
其中,N 1为归一化数据;S SDR为SDR数据;n为图像信号bit位深,通常SDR图像信号位深为8bit,即n取8。在归一化处理前,SDR数据S SDR数据值在0到255之间;在归一化后,得到的归一化数据N 1数据值在0到1之间。
在得到归一化数据后,对归一化数据进行线性还原处理,还原SDR信号在量化编码前的线性数据。本实施例中的还原处理是基于SDR显示系统的伽马特性或电光转换EOTF特性进行的,采用如下公式进行:
L=N 1 γ
其中,L为SDR数据对应的原始线性数据;N 1为归一化数据;γ为SDR显示系统的伽马特性或电光转换EOTF特性。根据上述处理,即得到了SDR数据量化编码前的原始线性数据。
步骤S20,根据所述图像显示终端的峰值亮度对所述原始线性数据进行高动态范围HDR转换,获得非线性数据;
本实施例中,在还原得到节目的原始线性数据时,即可对原始线性数据L进行重新映射(mapping),以得到适合智能电视的HDR显示屏显示的数据。而HDR技术最大的特点就是拥有很高的亮度动态范围,因此,本实施例中,在得到原始线性数据时,将获取图像显示终端的HDR显示屏的亮度属性值, 并根据峰值亮度对原始线性数据进行HDR转换,将其转换成与HDR显示屏匹配的非线性数据(即对SDR数据对应的原始数据进行再编码)。
本实施例中的HDR转换过程,采用如下公式进行:
N=L γ1
其中,N为HDR转化的非线性数据;L为归一化数据;γ1=1+alog 10(Y p/1000),Y p为显示屏的峰值亮度(cd/m 2),a为0到1之间的常数。
步骤S30,对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据进行图像显示。
本实施例中,在得到非线性数据时,并未立即根据该非线性数据进行显示;而是要对非线性数据进行伽马预置调整,抵消显示器的伽马特性。具体的,对现实中摄像机或成像设备来讲,输入能量和记录在图片文件中的颜色亮度之间的关系是线性的;但是由于传统CRT显示器(SDR)是使用电子显像管,其是通过控制电流大小来控制显示屏幕上的亮度,然而亮度和电流之间的关系并非是线性,这就导致CRT显示器显示的图像与摄像设备捕捉的实际图像不一致,为了校正这个差异,摄像机在保存图像时都会自动对数据进行一个伽马校正。基于这个原因,本实施例在得到非线性数据时,需要对非线性数据进行伽马预置调整(“反伽马”校正),从而获得HDR数据。在得到HDR数据时,即可根据该HDR数据进行显示对应的图像内容。
本实施例中的伽马预置调整过程,采用如下公式进行:
S HDR=(2 m-1)N 1/γ
其中,S HDR为HDR数据;m为输出图像信号位深;N为非线性数据;γ为SDR显示系统的伽马特性或EOTF特性。
经过上述过程获得的HDR数据,其对应的EOTF特性曲线已经改变。对应的图像与SDR对应的图像相比,其平均亮度水平已经降低。此时智能电视即根据所述HDR数据显示对应的图像,供用户观看。
进一步的,本实施例中的图像显示方法是通过智能电视实现的,当然该图像显示方法还可以通过其它的图像显示装置实现。该装置还可以是独立于电视之外的外接设备,也可以是安装在电视之中的内部装置,该装置具有电视机的上述图像显示功能,当然该装置还可相应增设其它功能,从而实现上述图像显示方法的各步骤。
本实施例中,通过获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据;根据所述图像显示终端的峰值亮度对所述原始线性数据进行高动态范围HDR转换,获得非线性数据;对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像。通过以上方式,将SDR原始内容还原成原始线性数据,再对原始数据进行重新映射(MAPPING),得到与目标HDR显示器相匹配图像数据,使得SDR内容能在HDR显示器上以合理的亮度进行显示,并呈现出HDR内容高动态的特色,提高用户的体验。
参照图3,图3为图2所述对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据进行图像显示的细化流程示意图。
基于上述图2所示实施例,步骤S30包括:
步骤S31,根据SDR显示系统的伽马特性或电光转换EOTF特性对所述非线性数据进行伽马预置,并根据预设调整因子对所述非线性数据进行调整,获得HDR数据;
步骤S32,根据所述HDR数据显示对应的图像。
本实施例中,在得到非线性数据时,并未立即根据该非线性数据进行显示;而是要对非线性数据进行伽马预置调整,抵消显示器的伽马特性。在进行伽马预置处理的过程中,可以是采用如下公式进行:
S HDR=(2 m-1)N 1/γ
其中,S HDR为HDR数据;m为输出图像信号位深;N为非线性数据;γ为SDR显示系统的伽马特性或EOTF特性。Y p为显示屏的峰值亮度(cd/m 2),a为0到1之间的常数。
在伽马预置的过程中,还可以根据实际情况,在上述伽马预置处理的公式中添加调整因子进行调整,以根据不同显示器的显示属性,对HDR数据进行个性调整。在加入调整因子时,具体的调整过程可以采用如下公式:
S HDR=(2 m-1)N β/γ
其中,S HDR为HDR数据;m为输出图像信号位深;N为非线性数据;γ为SDR系统的伽马特性或EOTF特性;β为预设调整因子,其数据值在0到1之间,该预设调整因子可由用户或厂家出厂时进行设置。
经过上述过程获得的HDR数据,其对应的EOTF特性曲线已经改变。对 应的图像与SDR对应的图像相比,其平均亮度水平已经降低;同时通过调整调整因子β,对HDR数据进行了进一步的适配调整。此时智能电视即根据HDR数据显示对应的图像,供用户观看。
进一步的,智能电视在根据HDR数据显示对应的图像后,若用户认为该亮度不合适(图像过亮或是过暗),用户可以用手动的方式对显示亮度进行调整。具体的,用户可以通过遥控器或是智能电视本体上的按键选择对应的亮度调整选项,从而触发亮度手动调整指令;智能电视在接收到用户触发的亮度手动调整指令时,根据所述亮度手动调整指令对HDR数据再次进行调整,从而改变当前显示图像的亮度;用户在完成手动调整操作时,智能电视会将用户手动调整后的HDR数据与步骤S31中根据公式S HDR=(2 m-1)N β/γ所得的HDR数据进行比较,并确定两者之间的区别,再根据该区别对预设调整因子(β)进行自动调整修正,从而使得智能电视的调整算法更准确,根据该调整算法所换算的数据和以及所显示的图像更能满足用户的实际观看需求,提高用户的体验。
参照图4,图4为本申请图像显示方法第二实施例的流程示意图。
基于上述图2所示实施例,步骤S30之后,还包括:
步骤S40,在接收到用户触发的对比显示指令时,在同一界面中以预设显示规则同时显示所述SDR数据对应的图像和所述HDR数据对应的图像。
本实施例中,智能电视在获得HDR数据时,即可根据HDR数据显示对应的图像,而此时智能电视并未立即删除原SDR数据;用户在观看的过程中,还可以触发相应的指令,使智能电视在同一界面中以预设显示规则同时显示SDR数据对应的图像和HDR数据对应的图像,从而更直观将的SDR图像内容和HDR图像内容进行对比。具体的,用户可以通过遥控器或是智能电视本体上的按键选择对应的对比显示选项,从而触发对比显示指令;智能电视在接收到用户触发的对比显示选项时,即在内存查找到原SDR数据,并根据该SDR数据和HDR数据在同一界面中以预设显示规则进行图像显示;其中预设显示规则包括显示位置,用户可以对两个图像的显示位置进行设置,例如将显示屏的显示区域平均分成左右两部分,左边用于显示SDR数据对应的图像内容,右边用于显示HDR数据对应的图像内容;当然还可以是将显示区域平均分成上下两部分,上边用于显示SDR数据对应的图像内容,下边用于显示 HDR数据对应的图像内容;当然还可以是其它的显示方式,方便用户将的SDR图像内容和HDR图像内容进行对比,再根据对比结果对图像的亮度进行进一步的调整。
本申请还提供一种计算机可读存储介质。
本申请计算机可读存储介质上存储有图像显示程序,所述图像显示程序被处理器执行时实现如上述图像显示方法的步骤。
其中,图像显示程序被执行时所实现的方法可参照本申请图像显示方法的各个实施例,此处不再赘述。
需要说明的是,在本文中,术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含,从而使得包括一系列要素的过程、方法、物品或者系统不仅包括那些要素,而且还包括没有明确列出的其他要素,或者是还包括为这种过程、方法、物品或者系统所固有的要素。在没有更多限制的情况下,由语句“包括一个……”限定的要素,并不排除在包括该要素的过程、方法、物品或者系统中还存在另外的相同要素。
上述本申请实施例序号仅仅为了描述,不代表实施例的优劣。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解到上述实施例方法可借助软件加必需的通用硬件平台的方式来实现,当然也可以通过硬件,但很多情况下前者是更佳的实施方式。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来,该计算机软件产品存储在如上所述的一个存储介质(如ROM/RAM、磁碟、光盘)中,包括若干指令用以使得一台终端设备(可以是手机,计算机,服务器,空调器,或者网络设备等)执行本申请各个实施例所述的方法。
以上仅为本申请的优选实施例,并非因此限制本申请的专利范围,凡是利用本申请说明书及附图内容所作的等效结构或等效流程变换,或直接或间接运用在其他相关的技术领域,均同理包括在本申请的专利保护范围内。

Claims (15)

  1. 一种图像显示方法,其中,所述图像显示方法应用于图像显示终端,所述图像显示方法包括以下步骤:
    获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据;
    根据所述图像显示终端的峰值亮度对所述原始线性数据进行高动态范围HDR转换,获得非线性数据;
    对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像。
  2. 如权利要求1所述的图像显示方法,其中,所述获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据的步骤包括:
    获取SDR数据,并根据SDR图像信号位深对所述SDR数据进行归一化处理,获得归一化数据;
    根据SDR显示系统的伽马特性或电光转换EOTF特性对所述归一化数据进行线性还原处理,获得所述SDR数据对应的原始线性数据。
  3. 如权利要求1所述的图像显示方法,其中,所述对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像的步骤包括:
    根据SDR显示系统的伽马特性或电光转换EOTF特性对所述非线性数据进行伽马预置,并根据预设调整因子对所述非线性数据进行调整,获得HDR数据;
    根据所述HDR数据显示对应的图像。
  4. 如权利要求3所述的图像显示方法,其中,所述对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像的步骤之后,还包括:
    在接收到用户触发的亮度手动调整指令时,根据所述亮度手动调整指令调整所述HDR数据,以调整当前显示图像的亮度,并根据调整后的HDR数据调整所述预设调整因子。
  5. 如权利要求1所述的图像显示方法,其中,所述对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像的步骤之后,还包括:
    在接收到用户触发的对比显示指令时,在同一界面中以预设显示规则同时显示所述SDR数据对应的图像和所述HDR数据对应的图像。
  6. 一种图像显示终端,其中,所述图像显示终端包括处理器、存储器及存储在所述存储器上并可被所述处理器执行的图像显示程序,其中所述图像显示程序被所述处理器执行时实现以下步骤:
    获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据;
    根据所述图像显示终端的峰值亮度对所述原始线性数据进行高动态范围HDR转换,获得非线性数据;
    对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像。
  7. 如权利要求6所述的图像显示终端,其中,所述获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据的步骤包括:
    获取SDR数据,并根据SDR图像信号位深对所述SDR数据进行归一化处理,获得归一化数据;
    根据SDR显示系统的伽马特性或电光转换EOTF特性对所述归一化数据进行线性还原处理,获得所述SDR数据对应的原始线性数据。
  8. 如权利要求6所述的图像显示终端,其中,所述对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像的步骤包括:
    根据SDR显示系统的伽马特性或电光转换EOTF特性对所述非线性数据进行伽马预置,并根据预设调整因子对所述非线性数据进行调整,获得HDR数据;
    根据所述HDR数据显示对应的图像。
  9. 如权利要求8所述的图像显示终端,其中,所述图像显示程序被所述处理器执行时,还实现以下步骤:
    在接收到用户触发的亮度手动调整指令时,根据所述亮度手动调整指令调整所述HDR数据,以调整当前显示图像的亮度,并根据调整后的HDR数据调整所述预设调整因子。
  10. 如权利要求6所述的图像显示终端,其中,所述图像显示程序被所述处理器执行时,还实现以下步骤:
    在接收到用户触发的对比显示指令时,在同一界面中以预设显示规则同时显示所述SDR数据对应的图像和所述HDR数据对应的图像。
  11. 一种计算机可读存储介质,其中,所述计算机可读存储介质上存储有图像显示程序,所述图像显示程序被处理器执行时实现以下步骤:
    获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据;
    根据所述图像显示终端的峰值亮度对所述原始线性数据进行高动态范围HDR转换,获得非线性数据;
    对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像。
  12. 如权利要求11所述的计算机可读存储介质,其中,所述获取标准动态范围SDR数据,并对所述SDR数据进行编码还原处理,获得所述SDR数据对应的原始线性数据的步骤包括:
    获取SDR数据,并根据SDR图像信号位深对所述SDR数据进行归一化处理,获得归一化数据;
    根据SDR显示系统的伽马特性或电光转换EOTF特性对所述归一化数据进行线性还原处理,获得所述SDR数据对应的原始线性数据。
  13. 如权利要求11所述的计算机可读存储介质,其中,所述对所述非线性数据进行伽马预置调整,获得HDR数据,并根据所述HDR数据显示对应的图像的步骤包括:
    根据SDR显示系统的伽马特性或电光转换EOTF特性对所述非线性数据进行伽马预置,并根据预设调整因子对所述非线性数据进行调整,获得HDR数据;
    根据所述HDR数据显示对应的图像。
  14. 如权利要求13所述的计算机可读存储介质,其中,所述图像显示程序被处理器执行时,还实现以下步骤:
    在接收到用户触发的亮度手动调整指令时,根据所述亮度手动调整指令调整所述HDR数据,以调整当前显示图像的亮度,并根据调整后的HDR数据调整所述预设调整因子。
  15. 如权利要求11所述的计算机可读存储介质,其中,所述图像显示程序被处理器执行时,还实现以下步骤:
    在接收到用户触发的对比显示指令时,在同一界面中以预设显示规则同时显示所述SDR数据对应的图像和所述HDR数据对应的图像。
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