Use Image Operation, you can assemble a set of image process to an image operation. Parameters of image process can be also saved. And then apply the image operation to many image files selected from windows explorer, including image in sub-directory.

Currently, Image Operation supports following types of image reading: Alias|Wavefront Files (*.pix), Cut Files (*.cut), Dcx Files (*.dcx), Graphics Interchange Format (*.gif), Half-Life Model Files (*.mdl), Homeworld Image Files (*.lif), Jpeg Files (*.jpe, *.jpg, *.jpeg), Kodak Photo CD Files (*.pcd), Microsoft Bitmap Files (*.bmp), Microsoft DirectDraw Surface (*.dds), Microsoft Icon Files (*.ico, *.cur), Multiple Network Graphics Files (*.mng), Paint Shop Pro Files (*.psp), PhotoShop Files (*.psd), Pic Files (*.pic), Pixar Files (*.pix), Portable AnyMap Files (*.pbm, *.pgm, *.pnm, *.ppm), Portable Network Graphics Files (*.png), Sgi Files (*.sgi), Targa Files (*.tga, *.vda, *.icb, *.vst), Tiff Files (*.tif), Quake Wal Files (*.wal), X PixelMap (*.xpm), ZSoft Pcx Files (*.pcx)

Supports following types of image writing: Jpeg Files (*.jpe, *.jpg, *.jpeg), Microsoft Bitmap Files (*.bmp), Microsoft DirectDraw Surface (*.dds), PhotoShop Files (*.psd), Portable AnyMap Files (*.pbm, *.pgm, *.ppm), Portable Network Graphics Files (*.png), Sgi Files (*.sgi), Targa Files (*.tga), Tiff Files (*.tif), ZSoft Pcx Files (*.pcx)

Supports following image process:
Alienify, Blur, Contrast, Crop, EdgeDetect, Emboss, Equalize, FlipImage, GammaCorrect, InvertAlpha, Mirror, Negative, Noisify, PixPixelize, ReplaceColours, Rotate, Saturate, Scale, ScaleColour, Sharpen, SwapColours, Wave, Convert, Luminance, Monochrome, Sheer, Diffuse, Margin, Turn, Zoom.