An Automated Tool to Remove Flash Light Spots using Image Processing Techniques

Abstract

An image is captured using a flash list on reflecting surfaces or glass objects, and it causes a bright light on a particular spot in an image. It is because of the direct reflection of flash resulting from glassy objects and results in loss of data over the reflected part of an image. To overcome these problems, an application is developed to capture and process the images. This application can capture the images in a single click in both with flash and without flash condition. The captured images are divided into a small number of blocks and calculate Peak Signal to Noise Ratio (PSNR) value for each block. Based on these PSNR values the blocks of a flash image is replaced with blocks without flash image and while replacement image intensity of an image will change to the same as the flash image. The resultant image is free from a flashlight spot and lost information. This technique is tested on different images and tabulated the corresponding values for comparing the result. The proposed method provides intuitively better results than the pixel-wise method. This application will be used in the photography to remove the reflected objects' flashlight spot.