(Image credit: Rod Lawton/Digital Camera World)ĭxO Nik Collection 4 consists of eight plug-ins, some of which are for creative image effects and some for more everyday image corrections and enhancements.Īnalog Efex Pro, Color Efex Pro, HDR Efex Pro and Silver Efex Pro are the chief 'creative' plug-ins, offering analog film and darkroom effects, a myriad of different photo treatments, filters and adjustments, HDR merging and tonemapping tools and powerful black and white image editing and conversions respectively. DxO Nik Collection 4 brings major improvements to Silver Efex Pro (shown here) and Viveza, but there are workflow improvements across the board for Adobe users too.