DPS wide dynamic technology
In the case of backlighting, the ultra-wide dynamic camera is generally used. The dynamic range of the ultra-wide dynamic camera represents the adjustment range of the camera's "darkest" and "brightest" image. The larger the dynamic range, the more layers the image represents Rich and clear, of course, the color space of the image is wider, that is, the ability of the ultra-wide dynamic camera to adapt to the backlight environment is also greater.
The traditional CCD camera only samples the entire image once during the process of acquiring an image, so there is bound to be a phenomenon of overexposure of bright areas or underexposure of dark areas in the entire image.
Although compared with the traditional CCD camera, the wide dynamic CCD camera has made technical breakthroughs one after another, and has now developed to the third generation CCD wide dynamic camera, the wide dynamic range has also reached 160 times, or 54dB. However, some data revealed that the dynamic range of the CCD wide dynamic camera can only reach 60dB at most. The CMOS-based DPS technology wide dynamic camera that has been launched now has a wide dynamic range of generally 95dB and a maximum of 120dB.
The main feature of DPS technology is that each pixel is individually sampled multiple times without loss to increase the dynamic range. To put it bluntly, wide dynamic camera is to use multiple exposure technology to balance the light and dark image screens and restore the true effect of the realistic scene.
DPS (Digital Pixel System) is a digital image sensor processing system. Its core technology is to include an ADC (analong-to-digited digital-to-analog converter) on each picked pixel. Directly convert it to digital signal and amplify, which maximizes the saving of invalid transmission operations, reduces noise, and ensures the high quality of the acquired image, so that the output image does not have any trailing and blooming phenomena. DPS system in the whole image acquisition, transmission and processing, regardless of the front-end pickup or back-end processing is completely in the form of digital, is a truly pure digital image sensing system.
American Pixim has developed a new type of DPS image pickup system based on the technological development of Stanford University in the 1990s. This system can obtain high-quality pictures through its super wide dynamic function. Pixim's DPS imaging technology from Stanford University has applied for 56 patents, 42 of which are already in effect. Pixim's DPS technology is currently the only image capture system that directly expresses optical signals as digital values. CCD and CMOS sensors represent the optical signal with analog values, and then convert the analog values ​​to digital values. DPS has no analog readout noise.
In DPS technology, each pixel has an ADC, and the information of each pixel is captured and processed independently. At the same time, a 32-bit CPU processing chip ARM7 (or ARM9) is used to control the exposure time of each pixel, so that Number conversion is more precise. The sensor can sample the light of each pixel multiple times and at high speed during the exposure period, and control the exposure time of each pixel, and store the pixel information when it reaches the optimal state, so each pixel has passed multiple times (0.8 Within ms) non-destructive individual sampling. After the pixels are collected, the system processes them again to form a high-quality image. The image formed by the DPS system is consistent in horizontal and vertical resolution, and any angle can ensure high resolution of the image.
Pixim's patented DPS technology marks a fundamental breakthrough in camera technology. Cameras with CCD as the mainstream technology will definitely be greatly impacted by DPS technology.
DPS technology has good imaging and high image quality in the concept of reduction. Using DPS technology can make the exposure time of each pixel different, so that the exposure time of different parts of the same picture is not the same. Therefore, at any point of the entire image, the best image display state can be achieved, and clear image details can be obtained, which is closer to the color reproduction of the real scene.
According to Pixim, "every pixel is a camera" in DPS technology. In an image, there are hundreds of thousands of exposed pixels, even under the most demanding lighting conditions. Capture clear, realistic images, and never darken or destroy images due to shadows, glare, reflections, and sunlight. Therefore, in DPS technology, the light corresponding to each pixel can be optimally exposed to form a high-quality image.
The DPS camera uses the same working mode as the "human eye-brain" system, which enables the image sensor and image processor to have two-way real-time interaction. The DPS camera image acquisition and processing process is similar to the relationship between the human eye and the brain. While processing and computing the image, it continuously issues instructions to the image sensor, not only adjusting the exposure time, but also changing the actual image capture algorithm Intelligent image processing function.
Therefore, under specific image characteristics and lighting, the DPS camera can finally provide more detailed, complete and real image details, so as to obtain the best image effect.
Road Traffic Signs are graphical symbols that display traffic regulations and road information. They can make traffic regulations visually, concisely and concisely expressed. At the same time, they also express the content that is difficult to describe in words. They are used to manage traffic and indicate the direction of driving to ensure the smooth flow of roads and the safety of driving. Applicable to highways, urban roads and all special highways, with the nature of the law, vehicles, pedestrians must comply with.
Road Traffic Signs
Road Traffic Signs,Traffic Light Sign,Road Safety Signs,Highway Road Traffic Signs
Yangzhou Heli Photoelectric Co., Ltd. , https://www.heli-eee.com