这是一款OS平台的 批量处理 ，可以帮助我们在mac电脑上批量处理图像文件：
Photo Gun is the secret weapon for all your photo processing needs!
No more time consuming, repetitive work! Simply drag and drop a picture, a hundred or thousands of photos, to the drop-window and select operations you want to apply to them. With a click of the “Save Results” button all processed photo-files are stored in a separate output folder.
You can perform the following operations:
Resize photos to make them more suitable for emails, blogs, websites, social networks, your personal use or for your business
Adjust brightness, contrast and saturation to enhance the light and color balance
Add professional touches to your photos and apply “Vignetting”, a creative effect, to draw attention to the center of the frame
Add watermark to prevent unauthorized use and/or copyright text or company logo with a customizable transparency level and other parameters. You can also use this operation to merge your photos
Crop to cut away unneeded image parts
Rotate to change the image angle
Mirror to flip the image vertically and horizontally
Blur to hide some of the details of your photos (different levels of blurring available)
Add Borders for a decorative look using different frame thicknesses and colors
Swap the RGB-channels;
Apply the Histogram optimization to automatically improve photos taken under similar conditions
Binarize the images, using the threshold value and produce the monochromatic results
Grayscale to convert color images into black-and-white ones
Invert the photos
Convert the file formats into/from JPEG, PNG, TIFF, BMP, XPM, PPM, including the full range quality compression of JPEG ranging from 1% to 100%
Give new names to your photos
Change the order of operations to achieve the best result
Save the operation flows as presets, if you will need them over and over again
Preview all images at each stage of the applied operations by clicking the eye symbol on the flow thumbnails, with retina-ready graphics.
测试电脑：MacBook Pro(Osx 10.11.5)