Image inpainting is the technique of restoring the lost or damaged regions or modifying the image contents imperceptibly. Image inpainting can be used to fill in the missing area in an image which is visible to human eyes, reinstallation of old images, correction of red-eye, object elimination in digital photographs, removal of spots of dust in image, creative effect by removing objects, privacy protection. The different techniques of image inpainting are exemplar based image inpainting, texture synthesis based image inpainting, PDE based image inpainting, Hybrid Inpainting techniques. This report contains the detailed study about image inpainting, survey of image inpainting techniques and comparative analysis of different techniques.