Research And Circuit Design Of Video Image Scaling And Color Enhancement Algorithm

Under the rapid development of modern high-tech information industry such as 5G,multi-screen interaction has become an important application scenario,and the new scenario also brings new challenges.Especially in the multi-screen interaction of smart home,each screen such as projection screen,mobile phone,tablet,refrigerator screen,etc.often needs to display the image of the same video source,but the resolution of each screen may not be exactly the same,which will lead to inter-screen Not suitable.Moreover,the device screens of smart homes still lack uniform standards today.The screen characteristics and display effects of devices of different manufacturers are not the same,resulting in the display quality not being guaranteed.In order to solve the two practical problems of being flexible and compatible with different resolution screens and displaying high-quality images on different quality screens,on the basis of investigation and consulting information,this paper did an in-depth study from the perspective of hardware to solve the above problems.This paper designs and researches the circuit of video image scaling and color enhancement.According to the resolution of the display screen,the video image data is increased or decreased on the basis of ensuring the original appearance of the image,and the color,saturation and brightness of the image,Contrast,sharpness and other important indicators to adjust to achieve high-quality display.The thesis first determines the frame and module design of the video image zooming technology,and then processes the color effect of the image on the basis of zooming,and introduces the circuit design ideas and simulation results in detail.The image scaling part of this thesis uses the quadratic interpolation scaling algorithm,which is improved on this basis to make the system more stable.The color enhancement part uses the algorithm of conversion between RGB and HSV,linear grayscale stretching algorithm,one-dimensional horizontal boundary enhancement(sharpness)and other algorithms to adjust the color of the picture.After completing the video image scaling and color enhancement circuit design,the combination of Testbench and Qt platform verification was used to verify the two functions of this circuit.And through the comparison between the actual original image and the processed image,the analysis found that the expected design expectations were met.