TWI537840B - Video recording apparatus and method thereof - Google Patents

Description

Image recording device and method thereof

The invention relates to an image recording device and a method thereof, which can adjust the brightness of a license plate image to a degree that can simultaneously view clear license plate image information and driving conditions when the vehicle is driving at night.

Conventional image recording devices, such as driving recorders, have a comprehensive adjustment based on the brightness value of the entire scene, but because of the high dynamic scene, the most important license plate information in the driving recorder will be too low. Unrecognizable, which makes this recorded image useless in the identification of traffic accidents, this problem is especially noticeable at night.

However, if the image of the license plate is clearly recorded by the image capture device at night, the brightness of the license plate image can be enhanced to a recognizable degree. However, this method can make the entire scene image overexposed due to excessive brightness and cannot be clearly viewed. The passing of a car accident.

In view of the above problems, the present proposal provides an image recording apparatus and method for dealing with the aforementioned problems.

An image recording apparatus of the present invention comprises: an image capturing unit, a license plate searching unit, a brightness adjusting unit, a super-resolution image processing unit, a license plate bonding unit and a storage unit.

The camera unit is configured to capture a first video, where the first video includes a plurality of consecutive pictures. The license plate search unit is configured to search for at least one license plate image from the first video, and output one license plate position and one license plate size of each screen. The brightness adjusting unit is configured to capture at least one license plate image information of the first video and a neighboring pixel information of the license plate image to adjust the information value, and perform the license plate information on the license plate image information and the license plate information adjacent to the pixel information. Brightness value adjustment. The super-resolution image processing unit reconstructs an ultra-resolution license plate image by using an ultra-resolution image processing technology according to the license plate image information of the plurality of pictures and the neighboring pixel information of the license plate image. The license plate fitting unit is configured to superimpose the super-resolution license plate image on the corresponding single screen in the first video according to the license plate position and the license plate size, and become a second video. a storage unit for storing the second video.

In the image recording apparatus of the present invention, the brightness adjustment unit is realized by digital gain or tone correspondence.

In the image recording apparatus of the present invention, the license plate attaching unit may perform a license plate recognition on the super-resolution license plate image, and attach a license plate identification result to the vicinity of the license plate position of the second video.

In the image recording apparatus of the present invention, the license plate search unit can search for the license plate image in the vicinity of the designated area after a user inputs a designated area.

According to the purpose of the present invention, an image recording method is further provided, comprising the steps of: capturing a first video by using a camera unit, wherein the first video comprises a plurality of consecutive pictures. Using a license plate search unit, searching for at least one license plate image based on the first video, and outputting one license plate position and one license plate size for each screen. Using a brightness adjustment unit to capture at least one license plate image information of the first video and a license plate image adjacent pixel information to adjust the information value, the license plate The image information and the license plate image are adjacent to the pixel information for adjusting the brightness value. An ultra-resolution image processing unit is used to reconstruct an super-resolution license plate image by using super-resolution image processing technology according to the license plate image information of the plurality of pictures and the neighboring pixel information of the license plate image. Using a license plate fitting unit, the super-resolution license plate image is overwritten on the corresponding single screen in the first video according to the license plate position and the license plate size, and becomes a second video. The second video is stored by using a storage unit.

In the image recording method of the present invention, the brightness value adjustment is implemented by using a digital gain or a tone correspondence.

In the image recording method of the present invention, the license plate attaching unit may perform a license plate recognition on the super-resolution license plate image, and attach a license plate identification result to the vicinity of the license plate position of the second video.

In the image recording method of the present invention, the license plate search unit can search for the license plate image in the vicinity of the designated area after a user inputs a designated area.

The advantages and spirit of the present invention will be further understood from the following detailed description of the invention.

101‧‧‧ camera unit

1011‧‧‧First video

103‧‧‧ License Plate Search Unit

1031‧‧‧ License plate location

1032‧‧‧ License plate size

105‧‧‧Brightness adjustment unit

107‧‧‧Super-resolution image processing unit

1071‧‧‧Super-resolution license plate image

109‧‧‧ License plate fitting unit

1091‧‧‧Second video

111‧‧‧ storage unit

31, 33‧‧ ‧ car

35, 37‧‧‧ License Plate Image

21, 23‧‧ ‧ car

25, 27‧‧‧ super-resolution license plate image

41, 43‧‧ ‧ car

45, 47‧ ‧ license plates

49, 51‧‧‧ License plate identification results

S10~S20‧‧‧Step process

The first figure is a block diagram of an image recording apparatus of the present invention;

2 is a schematic diagram of an embodiment of an image recording apparatus of the present invention;

3 is a schematic diagram of an embodiment of an image recording apparatus of the present invention;

4 is a schematic diagram of an embodiment of an image recording apparatus of the present invention;

The fifth figure is a flow chart of the image recording method of the present invention.

The detailed features and advantages of the present invention are set forth in the Detailed Description of the Detailed Description of the <RTIgt; </ RTI> <RTIgt; </ RTI> </ RTI> </ RTI> <RTIgt; The objects and advantages associated with the present invention can be readily understood by those skilled in the art.

The image recording apparatus of the present invention will be described in detail below with reference to the drawings, and the same elements will be denoted by the same reference numerals.

Please refer to the first figure, which is a block diagram of an image recording apparatus of the present invention. In the figure, the image recording apparatus of the present invention comprises: an image capturing unit 101, a license plate searching unit 103, a brightness adjusting unit 105, a super-resolution image processing unit 107, a license plate bonding unit 109, and a storage unit 111.

The camera unit 101 is configured to capture a first video, where the first video includes a plurality of consecutive pictures. The license plate searching unit 103 is configured to search for at least one license plate image from the first video, and output one license plate position and one license plate size of each screen. The brightness adjusting unit 105 is configured to capture at least one license plate image information of the first video and a license plate image neighboring pixel information, and use the digital gain or tone correspondence to compare the license plate image information and the license plate image adjacent pixel. The information is adjusted for a brightness value. The super-resolution image processing unit 107 reconstructs an ultra-resolution license plate image based on the license plate image information of the plurality of pictures and the neighboring pixel information of the license plate image, so that the most important license plate information of the driving recorder can be super-resolution image. User identification. The license plate bonding unit 109 is configured to overwrite the super-resolution license plate image with the license plate position and the license plate size onto a corresponding single screen in the first video to become a second video. The storage unit 111 is configured to store the license plate second video with suitable brightness and high resolution image.

The specific working principle of the image recording apparatus of the present invention will be described below by way of an example. Please refer to the first picture, the second picture and the third picture together, and use the camera unit 101 installed in the vehicle to capture the image of the vehicle. The camera unit 101 receives an exposure parameter control and captures the first picture including a plurality of consecutive pictures. Vision Then, as shown in the second figure, the license plate search unit 103 searches for the license plate images 35 and 37 of the vehicles 31 and 33 in the first video screen, and outputs the license plate position and the license plate size of each screen. Then, the brightness adjustment unit 105 captures all the license plate image information and the license plate image adjacent pixel information in the first video, and adjusts the information value of the license plate image and the license plate image adjacent pixel, and uses digital gain or tone correspondence to enhance The license plate image and the license plate image are adjacent to the brightness value of the pixel. The super-resolution image processing unit 107 reconstructs an ultra-resolution license plate image based on the license plate image information of the plurality of pictures and the neighboring pixel information of the license plate image, so that the most important license plate information of the driving recorder can be used for super-resolution images. Identification.

Then, as shown in the third figure, the information 25, 27 of the super-resolution license plate image is overwritten on the single screen corresponding to the position in the first video by the license plate bonding unit 109, and the license plate is available. The second video is identified. Finally, the second video is stored by the storage unit 111 to achieve the function of the driving recorder.

In another embodiment of the present invention, please refer to the first diagram, the second diagram, and the fourth diagram. The camera unit 101 of the image recording apparatus of the present invention is installed in the vehicle to capture the front image of the vehicle, and is exposed. Parameter control to capture a first video comprising a plurality of consecutive pictures, and then, as shown in the second figure, the license plate search unit 103 searches for all license plate images 35, 37 in the image according to the first video, and outputs a license plate for each picture. Location and size information. Then, the brightness adjustment unit 105 captures at least one license plate image information of the first video and its neighboring pixel information, and adjusts the information values of the two to enhance the brightness value of the license plate image and its neighboring pixels. The super-resolution image processing unit 107 reconstructs an ultra-resolution license plate image by using super-resolution image processing technology to provide license plate image information that can be clearly recognized by the driving record image. As shown in the fourth figure, the license plate attaching unit 109 can also perform a license plate recognition for the super-resolution license plate image, and attach the license plate identification result 49, 51 to the license plate of the first video in the first video. Near the positions 45, 47, becomes a second video, so that each mark is located in each vehicle and license plate In the nearby location, this method can preserve the authenticity of the original image, increase the reliability of the driving record image as evidence of the accident after the event, and finally store the second video by the storage unit 111.

Another embodiment of the image recording apparatus is further proposed in accordance with the purpose of the present invention. Please refer to the second, third, fourth and fifth figures together. According to the fifth embodiment, an image recording method of the present invention includes the following steps: In step S10, first, a first video is captured through an imaging unit, wherein the first video includes a plurality of consecutive pictures. Next, in step S12, as shown in the second figure, according to all the license plate images 35, 37 in the first video search screen, and outputting the license plate position and the license plate size of each screen, wherein the manner of searching for the license plate image is After the user inputs a designated area, a license plate image search is performed in the vicinity of the designated area. In step S14, a brightness adjustment unit is used to capture at least one license plate image information of the first video and a license plate image adjacent pixel information, and use a digital gain or tone correspondence to perform a brightness on the license plate and its neighboring pixels. Value adjustment. Then, in step S16, an ultra-resolution image processing unit is used to reconstruct an super-resolution license plate image by using super-resolution image processing technology according to the license plate image information of the plurality of pictures and the neighboring pixel information of the license plate image. In step S18, using a license plate attaching unit, the super-resolution license plate images 25 and 27 are overwritten on the corresponding single screen in the first video according to the license plate position and the license plate size, as shown in the third figure. The display is a second video with suitable brightness and high resolution license plate image, wherein the information of the super-resolution license plate image is overwritten in the first video according to the position and size of the license plate, and can also be performed on the super-resolution license plate image. A license plate identification, the license plate identification results 49, 51 are attached to the vicinity of the license plates 45, 47 of the second video car 41, 43 in the form of a label. Finally, in step S20, the second video after the adjustment is stored by using a storage unit.

It can be seen that the driving recorder of the present invention not only can clearly record the scene scene in the driving condition, but also preserves the original authenticity of the image, reduces the post-image processing, and reduces the image information storage vehicle, and can also overcome the license plate factor. The problem of insufficient brightness is difficult to identify, especially in the situation of driving at night.

So far, the spirit of the present invention has been described, and the method of the present invention will be described in detail with reference to specific embodiments to enable those skilled in the art to obtain sufficient knowledge to implement.

The above description of the present invention is intended to be illustrative of the present invention, and it is intended that the skilled in the art can understand the invention and practice the invention without limiting the scope of the invention. Modifications or modifications made by the spirit of the disclosure should still be included in the scope of the patents described below.

101‧‧‧ camera unit

1011‧‧‧First video

103‧‧‧ License Plate Search Unit

1031‧‧‧ License plate location

1032‧‧‧ License plate size

105‧‧‧Brightness adjustment unit

107‧‧‧Super-resolution image processing unit

1071‧‧‧Super-resolution license plate image

109‧‧‧ License plate fitting unit

1091‧‧‧Second video

111‧‧‧ storage unit

Claims (8)

An image recording device includes: a camera unit for capturing a first video, wherein the first video includes a plurality of consecutive pictures; and a license plate searching unit is configured to search for at least one license plate image from the first video, And outputting a license plate position and a license plate size for each screen; a brightness adjustment unit for capturing at least one license plate image information of the first video and a license plate image adjacent pixel information, the license plate image information and the The license plate image is adjusted to a brightness value adjacent to the pixel information; an ultra-resolution image processing unit reconstructs an image of the super-resolution license plate based on the license plate image information of the plurality of pictures and the neighboring pixel information of the license plate image; a unit for overwriting the super-resolution license plate image to a corresponding single screen in the first video according to the license plate position and the license plate size to become a second video; a storage unit for storing the first Second video. The image recording apparatus according to claim 1, wherein the brightness adjustment unit is implemented by digital gain or tone correspondence. The image recording device of claim 1, wherein the license plate attaching unit can perform a license plate recognition on the super-resolution license plate image, and attach a license plate recognition result to the second video in a labeled form. The image recording device of claim 1, wherein the license plate search unit can search for a license plate image in the vicinity of the designated area after a user inputs a designated area. An image recording method, comprising the steps of: capturing a first video by using a camera unit, wherein the first video comprises a plurality of consecutive pictures; and using a license plate search unit, searching for at least one license plate image according to the first video, And outputting a license plate position and a license plate size of each screen; using a brightness adjustment unit to capture at least one license plate image information of the first video and a license plate image adjacent pixel information, the license plate image information and the license plate Adjusting the brightness value of the image adjacent to the pixel information; using an ultra-resolution image processing unit to receive the license plate image information of the plurality of pictures and the neighboring pixel information of the license plate image, and reconstructing a super-resolution by using the super-resolution image processing technology a license plate image; using a license plate fitting unit, the super-resolution license plate image is overwritten on the corresponding single screen in the first video according to the license plate position and the license plate size, and becomes a second video; a storage unit that stores the second video. The image recording method of claim 5, wherein the brightness value adjustment is implemented by digital gain or tone correspondence. The image recording method of claim 5, wherein the license plate attaching unit can perform a license plate recognition on the super-resolution license plate image, and attach a license plate identification result to the second video in a labeled form. The image recording method of claim 5, wherein the license plate search unit can search for the license plate image in the vicinity of the designated area after a user inputs a designated area.