Optimage在减少图像内容的大小的同时，不会降低图像的质量，可以让你的图像仍然保持原有的质量。Optimage是一种先进的图像优化工具，可以为网站，应用程序，存储和共享以视觉无损方式最小化图像。
Optimage使用高级指标自动调整图像质量，最多可将10倍小图像文件视为原始图像文件。通过使用新颖和传统的启发式方法彻底尝试各种压缩参数和图像数据结构来实现最大压缩比。采用新颖的感知指标和改进的编码器，可将图像尺寸缩小90％，同时保持始终如一的高品质。通过使用新颖的，最先进的启发式技术来提供最高的压缩比，以实现图像缩减和数据压缩。
Optimage is an advanced image-optimization tool to minimize images in a visually lossless way for websites, apps, storage, and sharing. It uses advanced metrics to automatically adjust image quality for up to 10x smaller image files that are visually perceived as originals. Maximum compression ratio is achieved by exhaustively trying various compression parameters and image-data structures, using novel and traditional heuristics.
Simple native GUI and universal CLI clients are built to work efficiently across many different platforms on desktops and servers.
Features:
Automatic image compression
Intelligent lossy and lossless image compression
Achieve consistent good quality with custom perceptual image quality metrics and improved encoders
Nearly optimal image compression, the highest lossless compression density among known compressors
Avoid double compression with smart no-reference image quality assessment
Intelligently convert 24-bit PNG images to much smaller 8-bit indexed color images with full alpha transparency using perceptual color quantization and adaptive dithering
Greatly reduce the size of full-color images using alternative near-lossless compression
Full color management with ICC profile support
Convert to sRGB for consistent color on the web and mobile
Automatic chroma subsampling and grayscale conversion
Securely remove personal information and hidden metadata (Exif, XMP, IPTC, GPS geotags, comments, thumbnails, etc) while preserving some useful metadata (Android 9-patches, aPNG, etc)
Automatically and losslessly rotate photographs based on Exif Orientation tag
Scale a video or animation and adjust the frame rate for optimal file size
Powerful image workflow
Set up batch processing to streamline the optimization of large numbers of images
Fast and autoscalable parallel processing on modern multicore systems
Full control over optimization process with pausing and automatic termination
Resize, convert and rename images in batch mode
High-quality image scaling in 128 bits-per-pixel linear light using Lanczos resampling
Configurable file renaming and destination folder, absolute or relative
Export optimized files to a chosen folder preserving subfolder structure
Copy or move files using drag-and-drop or clipboard
Overwrite or move originals to Trash to restore any time
Preserve file timestamps to keep your library in order
Fully native app available for Mac, Windows (coming later) and Linux (coming later)
Simple command line tool to integrate into your image workflow
Seamless integration with Finder and Sketch
Quickly share optimized images using extensions in the Share menu
Support for industry standards
Optimize all common image formats including JPEG, PNG, APNG, GIF, SVG, WebP, HEIC and PDF
Optimize most common video formats including MPEG-4, H.264, WebM, Ogg and AV1
Minify ICO Windows icons, or favicons, and ICNS Apple icons
High-quality format conversion
Convert all common image formats supported by your system including HEIC, JPEG2000, TIFF and RAW
Convert between animation and video formats including GIF, APNG, WebP, MP4, WebM, Ogg Theora, HEVC, AV1 and ProRes
Convert Apple’s new high efficiency image format HEIC to optimized JPEG, PNG or WebP for sharing
Convert a camera raw image to JPEG or WebP image optimized for sharing
Convert an animated GIF to efficient MP4, WebM or AV1 video using accurate dithering removal and color depth restoration
Create a high-quality animated GIF from MOV, MP4, WebM, Ogg or ProRes video using improved color quantization and error diffusion dithering
Avoid the color shift when converting an animated GIF, APNG or WebP to MP4 video
Easily create responsive images and thumbnails using high-quality scaling
Generate high-quality previews for PDF, PSD and AI documents
What’s New:
Version 3.4.1:
Fixed failing activation in some cases
3.4.0
Improved batch processing
Improved video error detection
Improved drag-and-drop experience
Fixed support for iTunes Video files (M4V)
Fixed erasing table of contents in PDF files
Minor bug fixes and improvements
Compatibility: OS X 10.9 or later, 64-bit processor