WO2016082173A1

WO2016082173A1 - Toning monitor and real-time toning method

Info

Publication number: WO2016082173A1
Application number: PCT/CN2014/092432
Authority: WO
Inventors: 王尊正
Original assignee: 深圳市尊正数字视频有限公司
Priority date: 2014-11-28
Filing date: 2014-11-28
Publication date: 2016-06-02
Also published as: CN113096615A; CN113096615B; CN104813363A

Abstract

A toning monitor, used for toning an input image in real time. The toning monitor comprises an LUT mapping unit. The toning monitor further comprises: an acquisition module, used for acquiring 3D LUT data; a parsing module, used for parsing the acquired 3D LUT data to determine whether the 3D LUT data satisfies a predetermined condition, and updating the acquired 3D LUT data to the LUT mapping unit and performing new LUT mapping if the 3D LUT data satisfies the predetermined condition, or discarding the 3D LUT data if the 3D LUT data does not satisfy the predetermined condition; and a display module, used for displaying an input image subjected to the new LUT mapping.

Description

Color monitor and real-time color method

Technical field

The present invention relates to image processing, and more particularly to a color grading monitor and a real-time color grading method.

Background technique

In today's digital cinema technology, from the acquisition of the image to the final screening, the image will go through different systems, such as the image taken with a digital camera, which needs to be tuned by the color grading system, and then recorded by the film recorder. On the film, it is finally projected onto the screen through the projection system. Each system has its own unique color space, which means that the same image is not the same in different systems. The task of color management is to understand the characteristics of the color space of these systems and to unify the color space of different systems. . To put it simply, it is necessary to ensure that the images monitored during the production process are consistent with the final screen image effects.

In general, the process of color management can be seen as the process of color transitioning between different color spaces. If you do not make corrections, the performance of the same picture varies greatly in different color spaces. The picture on the monitor and the film copy will be displayed on the screen very differently; different monitors and different projection environments There will be visually obvious differences. In absolute terms, there are no two color space systems in the world that are identical. The role of the color management system currently on the market is to minimize the visual difference between images on different media and display devices. The most important part is to unify the picture of the monitor in the digital coloring process with the final film copy onto the screen, making them "look" more similar, in order to provide a relative for the colorist. "Accurate" visual reference. This type of color space conversion is often done by LUT mapping.

LUT mapping is a bridge that connects different color spaces in the process of color management. To the LUT mapping module an input value, the LUT mapping module can return an output value. For example, in a 10 bit RGB color space 1, a red is expressed as R = 640, G = 102, B = 94, and this red is also present in another 10 bit RGB color space 2, but is expressed as R =600, G=90, B=145, then the LUT mapping module that converts the color space 1 into the color space 2 after reading the data R=640, G=102, B=94, the returned value must be R=600 , G = 90, B = 145. One of the characteristics of LUT mapping is that it can be The color correction of different display devices when the original file is changed, the advantage of this is that the original image is not processed, so that it does not cause any loss; and without changing the original image, it means saving a lot of rendering. time.

The LUT is further divided into a 1D LUT and a 3D LUT. The 3D LUT is ideal for accurate color calibration because it handles all display calibration problems, from simple gamma values, color ranges and tracking errors, to advanced high-level nonlinearity, color crosstalk (decoupling), Hue, saturation, brightness, etc., basically contain the problem of handling all possible display calibrations.

However, the existing process of coloring using a 3D LUT is very complicated, and it is usually necessary to additionally set a color box to perform color correction on the 3D LUT data. In this way, the monitor includes a 3D LUT mapping module, and the color palette also includes a 3D LUT mapping module, wherein the 3D LUT mapping module in the monitor is used to implement color space mapping, 3D LUT mapping in the color box. The module is used for toning processing. As a result, system integration is not high and real-time color grading is not possible.

Summary of the invention

In order to solve the above problems, embodiments of the present invention provide a color grading monitor and a real-time color grading method which can simplify the color grading system and realize real-time color grading.

In one embodiment, a color adjustment monitor is provided for real-time color grading of an input image. The color adjustment monitor includes an LUT mapping unit. The color adjustment monitor further includes: an acquisition module, configured to acquire 3D LUT data; and a parsing module, configured to parse whether the acquired 3D LUT data meets a predetermined condition, and if yes, update the acquired 3D LUT data to the In the LUT mapping unit, and performing a new LUT mapping; discarding the 3D LUT data if the predetermined condition is not met; and a display module for displaying the input image after the new LUT mapping.

In another embodiment, a real-time color grading method is provided for real-time color grading of an input image. The real-time color grading method includes: acquiring 3D LUT data; parsing whether the received 3D LUT data meets a predetermined condition, and if so, updating the received 3D LUT data and performing a new LUT mapping if the predetermined condition is not met And discarding the 3D LUT data; and displaying the input image after the new LUT mapping.

When the above color grading monitor is used, the user transmits the 3D LUT data to the color grading monitor after generating the 3D LUT data through the user operation terminal. Through the parsing module and the update module, the 3D LUT data can be updated in real time to the LUT mapping unit inside the color adjustment monitor, through a simple architecture. Realistic color adjustment function.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a functional block diagram of a color grading monitor according to a first embodiment of the present invention;

2 is a functional block diagram of a color grading monitor according to a second embodiment of the present invention;

FIG. 3 is a flowchart of a real-time color grading method according to an embodiment of the present invention.

detailed description

The technical solutions of the present invention are further described in detail below with reference to the accompanying drawings and specific embodiments. It is apparent that the described embodiments are only a part of the embodiments of the invention, and not all of them. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the scope of the present invention.

First embodiment

Please refer to FIG. 1, which is a functional block diagram of a color grading monitor 100 according to a first embodiment of the present invention. The color adjustment monitor 100 is coupled to a user operating terminal 200. The color adjustment monitor 100 has a real-time color grading function for real-time color grading of an input image. In this embodiment, the user operation terminal 200 includes color grading software, and the color grading software may be PC color grading software, Mac color grading software, mobile phone (such as iphone) color grading software, Android system color grading software or WP tone. Color software. In other embodiments, the user terminal 200 can also be a color palette (described in detail in the second embodiment). Of course, the user operation terminal 200 is not limited thereto, and any device capable of outputting 3D LUT data can be used as the user operation terminal 200.

The user operation terminal 200 includes a 3D LUT data generation module 201 and a transmission module 202. The 3D LUT data generating module 201 is configured to generate 3D LUT data according to a user operation. In this embodiment, the user adjusts parameters in the user operation end according to his own color adjustment requirement, so that the user operation end can execute certain algorithms (such as ACDL algorithm) to calculate the 3D LUT data. The correspondence between the input RGB value and the output RGB value is described in the 3D LUT data. The sending module 202 is used to The 3D LUT data is transmitted to the color grading monitor 100. In this embodiment, the sending module 202 sends the 3D LUT data to the color grading monitor 100 through a communication network. It can be understood that the sending module 202 can send the 3D through at least one of an Ethernet interface network, a Wifi interface network, a Bluetooth interface network, a USB interface network, a serial interface network, a lightning interface network, and a 1394 interface network. LUT data.

The color adjustment monitor 100 includes a LUT mapping unit 10, a receiving module 20, a parsing module 30, a response module 40, an update module 50, and a display module 60.

The receiving module 20 is configured to receive 3D LUT data sent by the user operation terminal 200. Correspondingly, the receiving module 20 receives the 3D LUT data through at least one of an Ethernet interface network, a Wifi interface network, a Bluetooth interface network, a USB interface network, a serial interface network, a lightning interface network, and a 1394 interface network.

The parsing module 30 is configured to parse whether the 3D LUT data meets a predetermined condition, and if yes, update the received 3D LUT data to the LUT mapping unit 10, and perform a new LUT mapping; if the reservation is not met Conditions, the 3D LUT data is discarded. It can be seen that one of the important functions of the parsing module 30 is to avoid data errors caused by network transmission errors. Specifically, the parsing module 30 may compare the data format, the data length, and/or the data check information of the received 3D LUT data with a preset corresponding condition, and if the matching, the parsing result is that the predetermined condition is met. If it does not match, the result of the parsing is that the predetermined condition is not met. The LUT mapping unit 10 can be implemented by using an FPGA or an ASIC, and can be connected to an external storage device or an external storage device. In the present embodiment, the LUT mapping unit 10 is implemented using an FPGA.

The response module 40 is configured to feed back the analysis result of the parsing module 30 to the user operation end. In this embodiment, the response information fed back by the response module 40 is “received data is correct” or “received data error”. Specifically, when the parsing result is that the predetermined condition is met, the response module 40 feeds back the information that “receives the data correctly”, and when the parsing result is that the predetermined condition is not met, the response module 40 feeds back the “receive data error” information.

The update module 50 is connected between the parsing module 30 and the LUT mapping unit 10. When the parsing result is that the predetermined condition is met, the parsing module 30 transmits the latest 3D LUT data to the update module 50, and the update module 50 updates the 3D LUT data to the LUT mapping unit 10 to perform New 3D LUT mapping. After the update is completed, the user can observe the change in the video chromaticity on the screen of the color adjustment monitor 100 in real time.

The display module 60 is configured to display an input image after the new 3DLUT mapping according to the parsing result of the parsing module 30. Specifically, the display module 60 is connected to the LUT mapping unit 10, so that the display module 60 obtains an input image after the new 3D LUT mapping from the LUT mapping unit 10 in real time and performs display.

In other embodiments, the display module 60 may also be connected to the update module 50 and/or the LUT mapping unit 10, and when the parsing result is that the predetermined condition is met, the update module 50 outputs a control signal to the The display module 60 is configured to cause the display module 60 to acquire an input image after the new 3D LUT mapping from the LUT mapping unit 10 and display it.

When the color grading monitor 100 is used, the user transmits the 3D LUT data to the color grading monitor 100 after the user operates the terminal 200 to generate 3D LUT data. Through the parsing and updating functions, the correct 3D LUT data can be updated in real time to the LUT mapping unit 10 inside the color adjustment monitor 100, and the real-time color grading function can be realized by a simple architecture.

Second embodiment

Referring to FIG. 2, the color grading system 200a according to the second embodiment of the present invention is substantially the same as the color grading monitor 200 provided by the first embodiment, except that the user operating terminal 200a includes a color grading station 203, The 3D LUT data generating module 201a is integrated in the color grading monitor 100a. The color palette 203 is connected to the color adjustment monitor 100a via a USB data line.

Specifically, the color adjustment monitor 100a includes a 3D LUT data generation module 201a, an update module 50a, and a display module 60a.

The 3D LUT data generating module 201a is used for the signal transmitted from the color palette 203 to generate 3DLUT data. The color palette can be a keyboard and/or a mouse. In this embodiment, the user operates the scroll wheel or the slider or the button of the color palette 203 according to the coloring requirement of the user, and the 3D LUT data generating module 201a reads the scroll wheel or the slider or the button of the color palette 203 in real time. Information, and the 3D LUT data is generated according to a specific algorithm.

The update module 50a is connected between the 3D LUT data generating module 201a and the LUT mapping unit 10a for updating the received 3D LUT data into the LUT mapping unit 10a and performing a new 3D LUT mapping. The display module 60a is configured to display an input image after a new 3D LUT mapping. The working principles of the update module 50a and the display module 60a are the same as those of the update module and the display module in the first embodiment, and therefore will not be described again. It should be noted that, similar to the first embodiment, in other embodiments, the display module 60a may also be associated with the update module 50a and/or LUT. The mapping unit 10a is connected, and when the parsing result is that the predetermined condition is met, the update module 50a outputs a control signal to the display module 60a, so that the display module 60a acquires a new 3D from the LUT mapping unit 10a. The input image after the LUT is mapped and displayed.

The color grading monitor 100a in the second embodiment directly generates and updates the 3D LUT data, which is more convenient and quick.

It can be understood that the color correction monitor 100a in the second embodiment may also be provided with a parsing module (not shown) for parsing whether the 3D LUT data generated by the 3D LUT data generating module 201a meets a predetermined schedule. The condition, if yes, updates the received 3D LUT data into the LUT mapping unit 10a and performs a new LUT mapping; if the predetermined condition is not met, the 3D LUT data is discarded. At this time, the role of the parsing module will be to ensure that the 3D LUT data generating module 201a is capable of generating correct 3D LUT data.

Please refer to FIG. 3 , which is a flowchart of a real-time color grading method provided by the present invention. The real-time color grading method includes the following steps:

Step S301: Connect the user operation terminal. In this embodiment, the user operation terminal is connected through at least one of an Ethernet interface network, a Wifi interface network, a Bluetooth interface network, a USB interface network, a serial interface network, a lightning interface network, and a 1394 interface network. The user operating terminal 200 includes color grading software, and the color grading software may be PC color grading software, Mac color grading software, mobile phone (such as iphone) color grading software, Android system color grading software, or WP color grading software. In other embodiments, the user terminal 200 can also be a color palette. In this embodiment, the user terminal is connected via a USB cable. Of course, the user operation terminal 200 is not limited thereto, and any device capable of providing accurate and convenient control of human-computer interaction function can be used as the user operation terminal 200.

Step S303: Acquire 3D LUT data according to a user operation. In this embodiment, after the user operates the color grading software, the 3D LUT data sent by the user operation terminal 200 is received. Correspondingly, the 3D LUT data can be obtained through at least one of an Ethernet interface network, a Wifi interface network, a Bluetooth interface network, a USB interface network, a serial interface network, a lightning interface network, and a 1394 interface network. In another embodiment, the 3D LUT data is generated within the color grading monitor when the user operates the color palette.

Step S305: Parsing whether the 3D LUT data meets a predetermined condition. If yes, performing step S307: updating the acquired 3D LUT data and performing a new 3D LUT mapping; if the predetermined condition is not met, performing step S309: discarding The 3D LUT data. Specifically, when parsing, Comparing the data format, data length, and/or data check information of the received 3D LUT data with a preset corresponding condition. If they match, the analysis result is that the predetermined condition is met. If not, the analysis result is Not meeting the predetermined conditions.

Step S311: The analysis result is fed back to the user operation terminal for the user to confirm whether to re-adjust the 3D LUT data. In this embodiment, the feedback information that is fed back is “received data correctly” or “received data error”. When the parsing result is that the predetermined condition is met, the “received data is correct” information is fed back, and when the parsing result is that the predetermined condition is not met, , feedback "receive data error" information. At this point, the user needs to re-adjust the 3D LUT data.

Step S313: Display the input image after the new 3D LUT mapping.

It should be noted that the present invention does not limit the order of execution of the various steps.

With the color grading system and the real-time color grading method of the above-mentioned color grading monitor, after the user generates 3D LUT data through the user operation terminal or directly generates 3D LUT data in the color grading monitor, the 3D LUT data is updated in real time to the LUT mapping unit. And display in real time. Therefore, real-time color grading can be achieved through a simple architecture.

It should be noted that, through the description of the above embodiments, those skilled in the art can clearly understand that the present invention can be implemented by means of software plus a necessary hardware platform, and of course, all can be implemented by hardware. Based on such understanding, all or part of the technical solution of the present invention contributing to the background art may be embodied in the form of a software product, which may be stored in a storage medium such as a ROM/RAM, a magnetic disk, an optical disk, or the like. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present invention or portions of the embodiments.

The above are only the preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, and the equivalent changes made by the claims of the present invention are still within the scope of the present invention.

Claims

A color gamut monitor for real-time grading an input image, the grading monitor includes a LUT mapping unit, wherein the color grading monitor further comprises:

An acquisition module for acquiring 3D LUT data;

a parsing module, configured to parse whether the acquired 3D LUT data meets a predetermined condition, and if yes, update the acquired 3D LUT data to the LUT mapping unit, and perform a new LUT mapping; if the predetermined condition is not met, Discarding the 3D LUT data;

A display module for displaying an input image after a new LUT mapping.
The color grading monitor of claim 1, the color grading monitor further comprising:

The response module is configured to feed back the parsing result of the parsing module to a user operation end for the user to confirm whether to re-adjust the 3D LUT data.
The color grading monitor according to claim 2, wherein the parsing module is configured to perform data format, data length, and/or data check information of the received 3D LUT data with preset corresponding conditions. If the matching is matched, the result of the parsing is that the predetermined condition is met, and the response module returns the response information that “receives the data correctly”. If not, the parsing result is that the predetermined condition is not met, and the response module returns “received”. "Data error" response message.
A color grading monitor according to claim 1, further comprising an update module coupled between said parsing module and said LUT mapping unit, said update module for The 3D LUT data is updated into the LUT mapping unit.
The color grading monitor according to claim 1, wherein said color grading monitor comprises an Ethernet network, a Wifi interface network, a Bluetooth interface network, a USB interface network, a serial interface network, a lightning interface network, and a 1394 interface. At least one of the networks receives the 3D LUT data from a user operator.
The color grading monitor according to claim 2 or 5, wherein said user operation terminal comprises color grading software, said color grading software is PC color grading software, Mac color grading software, mobile phone color grading software, Android System coloring software or WP coloring software.
A color grading monitor according to claim 1, further comprising a 3D LUT data generating module, said color grading monitor receiving user operating parameters from a user operating terminal, said 3D LUT data generating module being responsive to said user operating parameters The 3D LUT data is generated.
A real-time color grading method for real-time color grading an input image, the real-time color grading method include:

Obtain 3D LUT data;

Parsing whether the received 3D LUT data meets a predetermined condition, if yes, updating the received 3D LUT data, and performing a new LUT mapping, and discarding the 3D LUT data if the predetermined condition is not met;

Displays the input image after the new LUT mapping.
A real-time color grading method according to claim 8, further comprising the steps of:

The analysis result is fed back to a user operation terminal for the user to confirm whether to re-adjust the 3D LUT data.
The real-time color grading method according to claim 8, wherein the step of analyzing whether the received 3D LUT data meets a predetermined condition comprises:

Comparing the data format, data length, and/or data check information of the received 3D LUT data with preset corresponding conditions;

If they match, the result of the parsing is that the predetermined condition is met, and the response message of “received data correctly” is returned;

If it does not match, the parsing result is a response message that does not meet the predetermined condition and returns "receive data error".