CN114945076A - Image sensor, image generation method and virtual reality display device - Google Patents
Image sensor, image generation method and virtual reality display device Download PDFInfo
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/40—Extracting pixel data from image sensors by controlling scanning circuits, e.g. by modifying the number of pixels sampled or to be sampled
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/40—Extracting pixel data from image sensors by controlling scanning circuits, e.g. by modifying the number of pixels sampled or to be sampled
- H04N25/44—Extracting pixel data from image sensors by controlling scanning circuits, e.g. by modifying the number of pixels sampled or to be sampled by partially reading an SSIS array
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention discloses an image sensor which comprises a photosensitive pixel array and a reading module, wherein the photosensitive pixel array comprises a first area and a second area, the photosensitive pixel array of the first area comprises three primary color photosensitive pixels which are arranged, the photosensitive pixel array of the second area comprises three primary color photosensitive pixel groups which are arranged, and any primary color photosensitive pixel group comprises at least two primary color photosensitive pixels. The reading module reads the response signal of each primary color photosensitive pixel in the first area and reads the response signal of each primary color photosensitive pixel group in the second area so as to generate an image according to the response signals. The first area of the sensing pixel array in the image sensor is higher in resolution, and can correspond to an area which is more concerned by eyes of a user, and the second area is lower in resolution, so that the image data volume is relatively reduced. Making it easier to display via the display device. The invention also discloses an image generation method and virtual reality display equipment.
Description
Technical Field
The present invention relates to the field of image devices, and more particularly, to an image sensor. The invention also relates to an image generation method and a virtual reality display device.
Background
With the rapid development of Virtual Reality (VR) technology, VR devices have come to the front of consumers, and Virtual Reality technology gradually develops to Mixed Reality (MR) technology. In order to realize mixed reality display, the realization of the perspective function, namely, the human eyes can see the surrounding real world through the display device, is a key step.
Currently, the perspective function is implemented as follows: an image of the real world is captured by a camera and then rendered by a display device in combination with a virtual image. In order to present a clear real-world image, the image resolution of the camera used is high, the amount of data transmitted by the camera is large, but the refresh rate of the screen of the display device is low, and the two are not matched. In the prior art, in order to normally display, optimization of image data processing is required, but a good display effect cannot be achieved, a user can still feel the pause phenomenon of a picture, and the power consumption of the whole machine is increased by increasing data processing.
Disclosure of Invention
The invention aims to provide an image sensor which is applied to a camera, can meet the image resolution requirement of the camera and relatively reduces the image data volume so as to be easier to display through a display device. The invention also provides an image generation method and virtual reality display equipment.
In order to achieve the purpose, the invention provides the following technical scheme:
an image sensor comprises a photosensitive pixel array and a reading module, wherein the photosensitive pixel array comprises a first area and a second area, the photosensitive pixel array of the first area comprises three primary color photosensitive pixels which are arranged, the photosensitive pixel array of the second area comprises three primary color photosensitive pixel groups which are arranged, and any primary color photosensitive pixel group comprises at least two primary color photosensitive pixels;
the reading module is used for reading a response signal of each primary color photosensitive pixel of the first area and a response signal of each primary color photosensitive pixel group of the second area, and the response signal of the primary color photosensitive pixel group is a response signal of any primary color photosensitive pixel of the primary color photosensitive pixel group so as to generate an image according to the read response signals.
Preferably, the three primary color photosensitive pixels in the first region are arranged in a preset form, and the three primary color photosensitive pixel groups in the second region are arranged in the preset form.
Preferably, the three primary color photosensitive pixels of the first region are arranged in a bayer array.
Preferably, each of the primary color photosensitive pixel groups includes the same number of primary color photosensitive pixels.
Preferably, the second area is arranged in a 2 × 2 square matrix with the primary color photosensitive pixel groups, and is arranged in a 2 × 2 square matrix to form an array, and each 2 × 2 square matrix includes the primary color photosensitive pixel groups.
Preferably, any one of the primary color photosensitive pixel groups is a square matrix formed by arranging the primary color photosensitive pixels.
Preferably, the first region corresponds to a user eye gaze region of the image.
An image generation method applied to the image sensor described above, the image generation method comprising:
and generating data of each pixel of an image according to the response signals of each primary color photosensitive pixel of the first area and the response signals of each primary color photosensitive pixel group of the second area to generate the image.
Preferably, the generating of the data of each pixel of the image based on the response signals of each primary-color photosensitive pixel of the first region and the response signals of each primary-color photosensitive pixel group of the second region includes:
for any primary color photosensitive pixel of the first area, generating data of a corresponding pixel in the image according to a response signal of the primary color photosensitive pixel;
and for any primary color photosensitive pixel group in the second area, generating data of corresponding pixels of each primary color photosensitive pixel of the primary color photosensitive pixel group in the image according to the response signal of the primary color photosensitive pixel group.
A virtual reality display device, includes camera and display screen, the camera is used for acquireing external environment's image, the display screen is used for showing virtual image and external environment's image, the camera includes above image sensor.
As can be seen from the foregoing technical solutions, an image sensor provided by the present invention includes a photosensitive pixel array and a reading module, where the photosensitive pixel array includes a first area and a second area, the photosensitive pixel array in the first area includes arranged three primary color photosensitive pixels, the photosensitive pixel array in the second area includes arranged three primary color photosensitive pixel groups, and any one primary color photosensitive pixel group includes at least two primary color photosensitive pixels. The reading module is used for reading a response signal of each primary color photosensitive pixel in the first area and reading a response signal of each primary color photosensitive pixel group in the second area, and the response signal of the primary color photosensitive pixel group is a response signal of any primary color photosensitive pixel of the primary color photosensitive pixel group so as to generate an image according to the read response signals.
According to the image sensor, the response signals of each primary color photosensitive pixel are read for the first area and the response signals of each primary color photosensitive pixel group are read for the second area to generate the image, the resolution of the first area is high, the first area can correspond to an area which is more concerned by eyes of a user, and the resolution of the second area is low, so that the image data volume is relatively reduced. Therefore, the image sensor of the invention is applied to a camera, can meet the image resolution requirement of the camera, and relatively reduces the image data volume, so that the image is easier to display through a display device.
The image generation method provided by the invention can achieve the beneficial effects.
The virtual reality display equipment provided by the invention can achieve the beneficial effects.
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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating an arrangement of three primary color photosensitive pixels in a first region according to an embodiment of the invention;
FIG. 2 is a diagram illustrating a second area having primary color photosensitive pixel groups arranged in a matrix according to an embodiment of the present invention;
fig. 3 is a diagram illustrating a photosensitive pixel array of an image sensor relative to a user's eye-gaze region according to an embodiment of the invention.
Detailed Description
In order to make those skilled in the art better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, shall fall within the protection scope of the present invention.
The embodiment provides an image sensor, which comprises a photosensitive pixel array and a reading module, wherein the photosensitive pixel array comprises a first area and a second area, the photosensitive pixel array of the first area comprises three primary color photosensitive pixels which are arranged, the photosensitive pixel array of the second area comprises three primary color photosensitive pixel groups which are arranged, and any one primary color photosensitive pixel group comprises at least two primary color photosensitive pixels;
the reading module is used for reading a response signal of each primary color photosensitive pixel of the first area and a response signal of each primary color photosensitive pixel group of the second area, and the response signal of the primary color photosensitive pixel group is a response signal of any primary color photosensitive pixel of the primary color photosensitive pixel group so as to generate an image according to the read response signals.
The photosensitive pixel array is formed by an arrangement of photosensitive pixels. A photosensitive pixel refers to a device that can perform photoelectric conversion when irradiated with light. Any one of the primary color photosensitive pixels is a photosensitive pixel that performs photoelectric conversion upon receiving the primary color light.
The second area comprises three primary color photosensitive pixel groups which are arranged, and the primary color photosensitive pixel groups are formed by arranging at least two same primary color photosensitive pixels.
In the image sensor of this embodiment, since the response signal of each primary color photosensitive pixel is read for the first area and the response signal of each primary color photosensitive pixel group is read for the second area to generate an image, the resolution of the first area is higher, and the first area may correspond to an area of more interest to the eyes of the user, so that the requirement for the resolution of the image of the camera is satisfied. And the resolution of the second area is smaller, relatively reducing the amount of image data. Therefore, the image sensor of the embodiment is applied to a camera, can meet the image resolution requirement of the camera, and relatively reduces the image data amount, so that the image is easier to display through the display device.
In this embodiment, the arrangement form of the three primary color photosensitive pixels in the first region is not limited, and the three primary color photosensitive pixels in the first region may be arranged in a bayer array, but is not limited thereto, and may also be arranged in other forms, and all of them are within the protection scope of the present invention.
In this embodiment, the arrangement form of the three primary color photosensitive pixel groups in the second region is not limited, and may be designed accordingly in practical application. The number of the primary color photosensitive pixels included in any one of the primary color photosensitive pixel groups is not limited, and may be set in practical applications according to the resolution requirement of the image generated by the image sensor and the requirement of the image data amount. Preferably, the number of primary color photosensitive pixels included in each primary color photosensitive pixel group is the same, for example, the number of red photosensitive pixels included in the red color photosensitive pixel group, the number of green photosensitive pixels included in the green color photosensitive pixel group, and the number of blue photosensitive pixels included in the blue color photosensitive pixel group are the same, so that the color effect of the generated image can be equalized, and the arrangement of the primary color photosensitive pixel groups in the photosensitive pixel array is facilitated.
Optionally, the three-primary-color photosensitive pixels in the first region are arranged in a preset manner, the three-primary-color photosensitive pixel groups in the second region are arranged in a preset manner, and the three-primary-color photosensitive pixel groups in the second region correspond to the three-primary-color photosensitive pixels in the first region, that is, the arrangement manner of the three-primary-color photosensitive pixels in the first region is the same as that of the three-primary-color photosensitive pixel groups in the second region. This helps to equalize the color effect of the first region and the color effect of the second region of the generated image.
Alternatively, the second area of the photosensitive pixel array may be formed by arranging the primary color photosensitive pixel groups in a 2 × 2 square matrix, and forming the array by arranging the 2 × 2 square matrix, where each 2 × 2 square matrix includes the three primary color photosensitive pixel groups. Each 2 x 2 matrix includes four primary color photosensitive pixel groups including at least a red photosensitive pixel group, a green photosensitive pixel group, and a blue photosensitive pixel group.
Optionally, any primary color photosensitive pixel group may be a square matrix formed by arranging primary color photosensitive pixels. But not limited thereto, the primary color photosensitive pixels of any one of the primary color photosensitive pixel groups may be arranged in other forms.
Referring to fig. 1 and 2, fig. 1 is a schematic diagram illustrating an arrangement of three primary color photosensitive pixels in a first area according to an embodiment, and fig. 2 is a schematic diagram illustrating a second area formed by a group of primary color photosensitive pixels arranged in a matrix according to an embodiment. As shown in fig. 1, the photosensitive pixel array of the first region is formed by arranging red photosensitive pixels R, green photosensitive pixels G, and blue photosensitive pixels B, and the three primary color photosensitive pixels are arranged in a bayer array.
As shown in fig. 2, the red-sensitive pixel group 101, the green-sensitive pixel group 102, and the blue-sensitive pixel group 103 in the second area are arranged in a 2 × 2 square matrix, specifically, one red-sensitive pixel group 101, two green-sensitive pixel groups 102, and one blue-sensitive pixel group 103, and the photosensitive pixel array in the second area is formed by arranging a plurality of 2 × 2 square matrices shown in fig. 2. In the square matrix shown in fig. 2, any one of the primary color photosensitive pixel groups is formed by arranging four primary color photosensitive pixels, for example, the red photosensitive pixel group 101 is a square matrix formed by arranging four red photosensitive pixels R1, R2, R3, R4.
Preferably, the first region corresponds to a user eye-gaze region of the image, and the second region may correspond to a region on one side of the user eye-gaze region in the image. Referring to fig. 3, fig. 3 is a schematic diagram of a photosensitive pixel array of an image sensor relative to a user eye-gaze area in an embodiment, as shown in the figure, a first area corresponds to a user eye-gaze area 11 in an image 10, and a second area corresponds to a side of the user eye-gaze area 11 in the image 10. Then, for the image generated by the image sensor, the user looks at the first area of the image by the eyes of the user when the user looks through the display device, and the resolution of the first area of the image is higher, so that the requirement of the user on the resolution of the image can be met.
Correspondingly, the present embodiment further provides an image generation method, which is applied to the image sensor described above, where the image generation method includes: and generating data of each pixel of an image according to the response signals of each primary color photosensitive pixel of the first area and the response signals of each primary color photosensitive pixel group of the second area to generate the image.
From response signals read from light-sensitive pixels of the image sensor, data for pixels of the image may be generated, thereby generating the image.
In the image sensor to which the image generating method of this embodiment is applied, the first region of the photosensitive pixel array includes arranged three-primary-color photosensitive pixels, the second region includes arranged three-primary-color photosensitive pixel groups, and any one of the primary-color photosensitive pixel groups includes at least two primary-color photosensitive pixels. Therefore, the image generated by the image generation method of the embodiment can meet the image resolution requirement, and the image data amount is relatively reduced, so that the image can be displayed more easily through the display device.
Optionally, the image generation method specifically includes: and for any primary color photosensitive pixel in the first area, generating data of a corresponding pixel in the image according to the response signal of the primary color photosensitive pixel. For example, in the arrangement of the photosensitive pixels in the first area shown in fig. 1, the response signals of each photosensitive pixel of the 16 photosensitive pixels are read to generate data of 16 pixels, so that the first area in the obtained image has higher resolution.
Optionally, the image generation method further specifically includes: and for any primary color photosensitive pixel group in the second area, generating data of corresponding pixels of each primary color photosensitive pixel of the primary color photosensitive pixel group in the image according to the response signal of the primary color photosensitive pixel group.
The response signal of the primary color photosensitive pixel group is the response signal of any primary color photosensitive pixel of the primary color photosensitive pixel group, and then the response signal can not be read for each primary color photosensitive pixel for the second area, so that the amount of image data transmitted by the image sensor is relatively reduced.
In the image generating method, for any primary color photosensitive pixel group in the second area, the data of the corresponding pixel of each primary color photosensitive pixel of the primary color photosensitive pixel group in the image is generated according to the read response signal of the primary color photosensitive pixel group. For example, as shown in the photosensitive pixel array of the second region in fig. 2, response signals of the red photosensitive pixel R1, the green photosensitive pixel G1, the green photosensitive pixel GG1, and the blue photosensitive pixel B1 may be read, and data of 16 pixels may be generated according to the response signals of the 4 photosensitive pixels, thereby reducing data transmission of 12 pixels.
For the photosensitive pixel array of the whole image sensor, if the first area and the second area respectively account for half, the photosensitive pixel array of the first area is arranged as shown in fig. 1, and the photosensitive pixel array of the second area is arranged as shown in fig. 2, compared with the bayer array adopted by the whole photosensitive pixel array, the new arrangement mode has the advantage that the transmitted image data amount is reduced 3/8.
Specifically, if the data amount of the bayer array is 1, the data amount of the new arrangement form in this embodiment is 1/2+1/4 × 1/2 — 5/8 — 62.5%, the data amount of the new arrangement form is 62.5% of the data amount of the conventional arrangement form, and the overall refresh rate can be increased by 1/0.625 — 1.6 times, that is, the maximum refresh rate of the RGB image sensor with the same resolution can only be 30Hz by using the conventional bayer array, but the refresh rate can be increased to 48Hz by using the new arrangement form, which can provide better video information for the virtual reality display device. Assuming that the refresh rate of the screen is 90Hz, two frames of images need to be synthesized by an algorithm when the perspective function of the virtual reality display is realized by using the RGB image sensor of 30Hz, and only one frame of image needs to be synthesized when the new arrangement refresh rate can reach 48Hz, thereby reducing the power consumption.
Correspondingly, this embodiment still provides a virtual reality display device, including camera and display screen, the camera is used for acquireing external environment's image, display screen is used for showing virtual image and external environment's image, the camera includes above image sensor.
The virtual reality display device of the embodiment uses a camera which can meet the image resolution requirement, and relatively reduces the image data volume, so that the image can be more easily displayed through the display device.
The image sensor, the image generation method and the virtual reality display device provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. The image sensor is characterized by comprising a photosensitive pixel array and a reading module, wherein the photosensitive pixel array comprises a first area and a second area, the photosensitive pixel array of the first area comprises three primary color photosensitive pixels which are arranged, the photosensitive pixel array of the second area comprises three primary color photosensitive pixel groups which are arranged, and any one primary color photosensitive pixel group comprises at least two primary color photosensitive pixels;
the reading module is used for reading a response signal of each primary color photosensitive pixel of the first area and a response signal of each primary color photosensitive pixel group of the second area, and the response signal of the primary color photosensitive pixel group is a response signal of any primary color photosensitive pixel of the primary color photosensitive pixel group so as to generate an image according to the read response signals.
2. The image sensor according to claim 1, wherein the three primary color photosensitive pixels of the first region are arranged in a predetermined pattern, and the three primary color photosensitive pixel groups of the second region are arranged in the predetermined pattern.
3. The image sensor according to claim 2, wherein the three primary color photosensitive pixels of the first region are arranged in a bayer array.
4. The image sensor of claim 1, wherein each of the primary color photosensitive pixel groups includes a same number of primary color photosensitive pixels.
5. The image sensor as claimed in claim 1, wherein the second area is arranged in a 2 x 2 square matrix with the primary color photosensitive pixel groups, the array is formed by a 2 x 2 square matrix arrangement, and each 2 x 2 square matrix includes the three primary color photosensitive pixel groups.
6. The image sensor of claim 5, wherein any one of the primary color photosensitive pixel groups is a square matrix of the primary color photosensitive pixels.
7. The image sensor of claim 1, wherein the first region corresponds to a user eye gaze region of the image.
8. An image generation method applied to the image sensor according to any one of claims 1 to 7, the image generation method comprising:
and generating data of each pixel of an image according to the response signals of each primary color photosensitive pixel of the first area and the response signals of each primary color photosensitive pixel group of the second area to generate the image.
9. The image generation method according to claim 8, wherein generating data of each pixel of an image from the response signal of each primary-color photosensitive pixel of the first region and the response signal of each primary-color photosensitive pixel group of the second region includes:
for any primary color photosensitive pixel of the first area, generating data of a corresponding pixel in the image according to a response signal of the primary color photosensitive pixel;
and for any primary color photosensitive pixel group in the second area, generating data of corresponding pixels of each primary color photosensitive pixel of the primary color photosensitive pixel group in the image according to the response signal of the primary color photosensitive pixel group.
10. A virtual reality display device comprising a camera for capturing images of an external environment and a display screen for displaying virtual images and images of the external environment, the camera comprising an image sensor according to any one of claims 1 to 7.
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