CN108469302B - Color correction and test device - Google Patents
Color correction and test device Download PDFInfo
- Publication number
- CN108469302B CN108469302B CN201810610277.4A CN201810610277A CN108469302B CN 108469302 B CN108469302 B CN 108469302B CN 201810610277 A CN201810610277 A CN 201810610277A CN 108469302 B CN108469302 B CN 108469302B
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- color
- color card
- card fixing
- light source
- fixing plate
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- 238000012360 testing method Methods 0.000 title claims abstract description 46
- 230000003287 optical effect Effects 0.000 claims abstract description 29
- 238000010191 image analysis Methods 0.000 claims description 7
- 238000005286 illumination Methods 0.000 abstract description 14
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- 238000003384 imaging method Methods 0.000 description 5
- 230000004456 color vision Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000004438 eyesight Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/46—Measurement of colour; Colour measuring devices, e.g. colorimeters
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T5/00—Image enhancement or restoration
- G06T5/40—Image enhancement or restoration by the use of histogram techniques
-
- G06T5/90—
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T7/00—Image analysis
- G06T7/90—Determination of colour characteristics
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06T—IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
- G06T2207/00—Indexing scheme for image analysis or image enhancement
- G06T2207/10—Image acquisition modality
- G06T2207/10024—Color image
Abstract
The invention provides a color correction and test device which comprises a first fixing plate, a second fixing plate, a light source and a color card fixing disc, wherein the first fixing plate is arranged above the second fixing plate, the light source is fixed on the first fixing plate, the color card fixing disc is formed on the second fixing plate, the light source and the color card fixing disc are oppositely arranged, the optical axis of the light source is perpendicular to the color card fixing disc, the color card fixing disc comprises a plurality of first color card fixing grooves, and the distance between the corresponding position of each color card fixing groove and the optical axis of the light source is equal. The device can better test and correct white balance and color of the illumination light source.
Description
Technical Field
The invention relates to the field of color correction, in particular to a color correction and testing device.
Background
The color perception process of the machine is similar to that of the human eye, and the illumination, object reflection characteristics and spectral characteristics of the machine imaging system are three main factors in image color formation. Unlike the color vision characteristics of the human eye, the lack of automatic adaptability of machine vision, the change in illumination, the change in image acquisition system, etc. will all cause a change in image color data. Thus, machine imaging color data is entirely dependent on the performance of the illumination and imaging system during imaging, and does not have color constancy and intelligence, which lack would affect the application of machine imaging and vision systems in various fields.
In a plurality of fields such as medicine, television, camera shooting, and the like, color correction is carried out, the influence of the difference between an instrument illumination light source and image input and output equipment on the color of an image is removed, and the method has important significance in obtaining the image data truly reflecting the color of an observation object. Currently, color correction techniques for performing color correction on output devices, such as displays, computer screens, etc., are well established. But few devices are capable of correcting the effect of the illumination source on color.
Disclosure of Invention
The invention aims to provide a color correction and test device which can better test and correct white balance and color of an illumination light source.
The invention provides a color correction and test device which comprises a first fixing plate, a second fixing plate, a light source and a color card fixing disc, wherein the first fixing plate is arranged above the second fixing plate, the light source is fixed on the first fixing plate, the color card fixing disc is formed on the second fixing plate, the light source and the color card fixing disc are oppositely arranged, the optical axis of the light source is perpendicular to the color card fixing disc, the color card fixing disc comprises a plurality of first color card fixing grooves, and the distance between the corresponding position of each color card fixing groove and the optical axis of the light source is equal.
Further, the color card fixing plate is circular, and a plurality of first color card fixing grooves are distributed along the circumference of the color card fixing plate.
Further, each first color card fixing groove has the same shape, and a plurality of first color card fixing grooves are uniformly distributed along the circumferential direction of the color card fixing disc.
Further, the first color card fixing groove is round, fan-shaped, triangular or rectangular.
Further, the color card fixing disc further comprises a plurality of second color card fixing grooves, and the distances between the second color card fixing grooves and the optical axis of the light source are equal.
Further, the first color card fixing grooves are surrounded to form a circular ring shape, and the second color card fixing grooves are arranged in the circular ring-shaped inner circle surrounded by the first color card fixing grooves.
Further, the number of the second color card fixing grooves is four, the four second color card fixing grooves are distributed in a 2×2 array, and the optical axis of the light source passes through the center of the array.
Further, the second color card fixing grooves form a circular ring, and the circle centers of the circular rings formed by the second color card fixing grooves are positioned on the optical axis of the light source.
Further, a color card is placed in each first color card fixing groove, and a gray color card is placed in each second color card fixing groove.
Further, the color correction and test device further comprises a black box, the black box is sleeved outside the first fixing plate and the second fixing plate, and small holes for circuit connection are formed in the black box.
Further, the color correction testing device further comprises an image acquisition device and an image analysis module, wherein the image acquisition device and the light source are arranged on the first fixing plate together, and the image acquisition device is electrically connected with the image analysis module.
In summary, the first color card fixing grooves are formed in the color card fixing disc, so that the distances between the corresponding positions on each first color card fixing groove and the optical axis of the light source are equal, the positions of the color cards are recombined, and finally the distances between the corresponding positions on the color cards and the optical axis are equal; when the color correction test of the light source is carried out, as the distances between the optical axes of the light source and the positions corresponding to the color cards are equal, the light source can uniformly irradiate the color cards, so that errors of test results caused by uneven illumination of the light source can be well prevented, and the color test and correction of the illumination light source can be well carried out.
The foregoing description is only an overview of the present invention, and is intended to be implemented in accordance with the teachings of the present invention, as well as the preferred embodiments thereof, together with the following detailed description of the invention, given by way of illustration only, together with the accompanying drawings.
Drawings
Fig. 1 is a schematic diagram of an internal structure of a color calibration and testing device according to a first embodiment of the present invention.
Fig. 2 is a schematic structural view of the second fixing plate in fig. 1.
FIG. 3 is a schematic diagram showing an external structure of the color calibration and testing apparatus in FIG. 1.
Fig. 4 is a schematic structural diagram of a second fixing plate in the color correction and testing device according to the second embodiment of the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the present invention to achieve the preset purpose, the following detailed description of the present invention is given with reference to the accompanying drawings and preferred embodiments.
The invention aims to provide a color correction and test device which can better test and correct white balance and color of an illumination light source.
Fig. 1 is a schematic diagram illustrating an internal structure of a color calibration and testing device according to a first embodiment of the present invention, fig. 2 is a schematic diagram illustrating a structure of a second fixing plate in fig. 1, and fig. 3 is a schematic diagram illustrating an external structure of the color calibration and testing device in fig. 1. As shown in fig. 1 to 3, the color correction and testing apparatus provided in the first embodiment of the present invention includes a first fixing plate 10, a second fixing plate 20, and a supporting column 30 supported between the first fixing plate 10 and the second fixing plate 20, wherein the first fixing plate 10 is located above the second fixing plate 20.
A light source (not shown) is provided on the first fixing plate 10 toward the second fixing plate 20, with an optical axis of the light source being perpendicular to the second fixing plate 20. In this embodiment, the first fixing plate 10 is provided with a light source clamping portion 11, the light source is fixed on the first fixing plate 10 by the light source clamping portion 11, and the light source clamping portion 11 is provided with a control handle 12 for adjusting the diameter of the light source clamping portion 11 to meet the requirement of fixing light sources of various sizes.
The second fixing plate 20 is provided with a color card fixing disc 40 towards the direction of the first fixing plate 10, the color card fixing disc 40 is circular, the color card fixing disc 40 comprises a plurality of first color card fixing grooves 41, the first color card fixing grooves 41 are arranged along the circumferential direction of the fixing disc, a color card is arranged in each first color card fixing groove 41, the optical axis of the light source is perpendicular to the color card fixing disc 40, and the distance from the corresponding position on each first color card fixing groove 41 to the optical axis of the light source is equal through the center of the color card fixing disc 40.
In this embodiment, by arranging the plurality of first color card fixing slots 41 on the color card fixing disc 40, the distances between the corresponding positions on each first color card fixing slot 41 and the optical axis of the light source are equal, so as to recombine the positions of the color cards, and finally, the distances between the corresponding positions on the color cards and the optical axis are equal. When the white balance and the color of the light source are tested and corrected, the light source can uniformly irradiate the color cards because the distances between the optical axes of the light source and the positions corresponding to the color cards are equal, so that errors of test results caused by uneven illumination of the light source can be well prevented. The white balance and color test and correction can be well carried out on the illumination light source.
Further, in the present embodiment, in order to make the distance from the optical axis of the light source to the corresponding position on each first color card fixing groove 41 identical, the shapes of the plurality of first color card fixing grooves 41 may be identical. Preferably, each of the first color card fixing grooves 41 may have a fan shape or a fan ring shape, and the plurality of first color card fixing grooves 41 are uniformly arranged along the circumferential direction of the color card fixing plate 40. The number of the first color card fixing grooves 41 and the types of the color cards placed in the first color card fixing grooves 41 in one color card fixing plate 40 can be determined by the white balance and the color test and correction requirements.
It should be understood that the shape of the first color card fixing groove 41 is not limited to the fan shape or the fan shape, and may be a circle, a triangle, a rectangle, or the like, as long as the corresponding positions of the plurality of first color card fixing grooves 41 are equal to the distance between the optical axes of the light sources.
Further, in order to enable the color correction and testing device provided by the invention to better perform white balance and color test and correction on the light source, the color card fixing plate 40 further comprises second color card fixing grooves 42 besides the first color card fixing grooves 41, and the distance between the corresponding position of each second color card fixing groove 42 and the optical axis of the light source is identical. In this embodiment, each first color card fixing slot 41 is a ring, the plurality of first color card fixing slots 41 together form a ring, the second color card fixing slots 42 are disposed in the ring, the number of the second color card fixing slots 42 is four, the four second color card fixing slots 42 are identical in shape and are all rectangular and are distributed in a 2×2 array, and the optical axis of the light source passes through the center of the array.
In use, a color chip, such as red, yellow, green, etc., may be placed in each first color chip-holding groove 41, and a gray chip, such as white, light gray, dark gray, and black, may be placed in each second color chip-holding groove 42. By such arrangement, the color saturation can be measured and corrected by the color chart in the first color chart fixing groove 41, and the white balance can be measured and corrected by the color chart in the second color chart fixing groove 42.
In order to ensure that the positions and the placement order of the color patches are the same during each detection, an indication arrow 21 is also provided on the second fixing plate 20.
In order to prevent the interference of the external light to the white balance and the color test and correction of the light source, in the embodiment, the color correction and test device further includes a black box 50, and the black box 50 is sleeved outside the first fixing plate 10, the supporting column 30 and the second fixing plate 20. Small holes 51 are also left in the side walls of the black box 50 to facilitate the connection of various types of lines. An aperture adjusting device 52 is further provided on the small hole 51 to adjust the aperture of the small hole 51.
Further, in the present embodiment, the color correction and testing device further includes an image capturing device and an image analysis module, where the image capturing device and the light source are disposed on the first fixing plate 10 together. Preferably, the image acquisition device and the light source together form an endoscope, the image acquisition device is electrically connected with the image analysis module through a circuit, the image analysis module can process image white balance and color images by adopting software such as Matlab, photoShop, white balance analysis can be performed by methods such as a gray world method and a dynamic threshold automatic white balance method, and color correction can also be performed by methods such as polynomial fitting, a least square method, orthometric equalization and gamma correction.
Fig. 4 is a schematic structural diagram of a second fixing plate in the color correction and testing device according to the second embodiment of the present invention. As shown in fig. 4, the color correction and testing device according to the second embodiment of the present invention has substantially the same structure as the color correction and testing device according to the first embodiment, and includes a first color card fixing slot 41 and a second color card fixing slot 42, wherein the plurality of first color card fixing slots 41 form a circular shape, and the second color card fixing slot 42 is disposed in an inner circle of the circular shape. Unlike the first embodiment, in this embodiment, the plurality of second color chart fixing grooves 42 are arranged along the circumferential direction of the circular inner circle, which also constitutes a circular shape, the center of which is located on the optical axis of the light source.
It is to be understood that in other embodiments, the shape of the second color chart fixing groove 42 is not limited to the above shape, and may be fan-shaped, triangular, etc.
In this embodiment, the number of the second color chip fixing slots 42 is six, and one black, one white, and four different gray color chips may be provided. It is understood that the number of the second color card fixing slots can be determined according to the calibration and testing requirements.
In summary, according to the present invention, the first color card fixing slots 41 are formed in the color card fixing plate 40, so that the distance between the corresponding position on each first color card fixing slot 41 and the optical axis of the light source is equal, and the positions of the color cards are recombined, so that the distance between the corresponding position on each color card and the optical axis is equal; when the color correction test of the light source is carried out, as the distances between the optical axes of the light source and the positions corresponding to the color cards are equal, the light source can uniformly irradiate the color cards, so that errors of test results caused by uneven illumination of the light source can be well prevented, and the color test and correction of the illumination light source can be well carried out.
The present invention is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalent changes and variations in the above-mentioned embodiments can be made by those skilled in the art without departing from the scope of the present invention.
Claims (8)
1. A color correction and test device, characterized by: the color card fixing device comprises a first fixing plate, a second fixing plate, a light source and a color card fixing disc, wherein the first fixing plate is arranged above the second fixing plate, the light source is fixed on the first fixing plate, the color card fixing disc is formed on the second fixing plate, the light source and the color card fixing disc are oppositely arranged, the optical axis of the light source is mutually perpendicular to the color card fixing disc, the color card fixing disc comprises a plurality of first color card fixing grooves, the distance between the corresponding positions of the color card fixing grooves and the optical axis of the light source is equal, the color card fixing disc also comprises a second color card fixing groove, the distance between the plurality of second color card fixing grooves and the optical axis of the light source is equal, the first color card fixing grooves are surrounded into a circular shape, the second color card fixing grooves are arranged in circular shapes surrounded by the plurality of first color card fixing grooves, a color card is placed in each first color card fixing groove, and the color card is placed in each first color card fixing groove.
2. The color correction and testing device of claim 1, wherein: the color card fixing disc is circular, and a plurality of first color card fixing grooves are distributed along the circumference of the color card fixing disc.
3. The color correction and testing device of claim 2, wherein: the shape of each first color card fixing groove is the same, and a plurality of first color card fixing grooves are uniformly distributed along the circumference of the color card fixing disc.
4. A color correction and testing device according to claim 3, wherein: the first color card fixing groove is round, fan-shaped, triangular or rectangular.
5. The color correction and testing device of claim 1, wherein: the number of the second color card fixing grooves is four, the four second color card fixing grooves are distributed in a 2 multiplied by 2 array, and the optical axis of the light source passes through the center of the array.
6. The color correction and testing device of claim 1, wherein: the second color card fixing grooves form a circular ring, and the circle centers of the circular rings formed by the second color card fixing grooves are positioned on the optical axis of the light source.
7. The color correction and testing device of claim 1, wherein: the color correction and test device further comprises a black box, wherein the black box is sleeved outside the first fixing plate and the second fixing plate, and small holes for circuit connection are formed in the black box.
8. The color correction and testing device of claim 1, wherein: the color correction and test device further comprises an image acquisition device and an image analysis module, wherein the image acquisition device and the light source are arranged on the first fixing plate together, and the image acquisition device is electrically connected with the image analysis module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810610277.4A CN108469302B (en) | 2018-06-13 | 2018-06-13 | Color correction and test device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810610277.4A CN108469302B (en) | 2018-06-13 | 2018-06-13 | Color correction and test device |
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| CN108469302A CN108469302A (en) | 2018-08-31 |
| CN108469302B true CN108469302B (en) | 2024-01-16 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110493510B (en) * | 2019-07-09 | 2021-01-26 | 维沃移动通信有限公司 | Image processing method and terminal equipment |
| CN111292263B (en) * | 2020-01-21 | 2022-11-04 | 东华大学 | Image enhancement method based on color correction and deblurring |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101939997A (en) * | 2007-12-10 | 2011-01-05 | 豪威科技有限公司 | Image sensor apparatus and method for color correction with an illuminant-dependent color correction matrix |
| CN104902153A (en) * | 2015-05-25 | 2015-09-09 | 北京空间机电研究所 | Color correction method for multi-spectrum cameras |
| WO2017121866A1 (en) * | 2016-01-15 | 2017-07-20 | Barco Nv | System and method for endoscope calibration |
| CN208350210U (en) * | 2018-06-13 | 2019-01-08 | 上海安翰医疗技术有限公司 | Color correction and test device |
-
2018
- 2018-06-13 CN CN201810610277.4A patent/CN108469302B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101939997A (en) * | 2007-12-10 | 2011-01-05 | 豪威科技有限公司 | Image sensor apparatus and method for color correction with an illuminant-dependent color correction matrix |
| CN104902153A (en) * | 2015-05-25 | 2015-09-09 | 北京空间机电研究所 | Color correction method for multi-spectrum cameras |
| WO2017121866A1 (en) * | 2016-01-15 | 2017-07-20 | Barco Nv | System and method for endoscope calibration |
| CN208350210U (en) * | 2018-06-13 | 2019-01-08 | 上海安翰医疗技术有限公司 | Color correction and test device |
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