Image denoising becomes a big concern when we talk about image processing and eradication of the noises from any processed image. Images should be denoised in such a manner that the noises present in images are removed while preserving information without altering them. As image noises corrupts image hence it becomes essential to remove it and for this there are numerous algorithms available. Each one is having its own assumption, pros and cons and limitations. This review paper presents some works that has been recently done on image denoising.