sharp-cli

# sharp-cli > CLI for [sharp](https://www.npmjs.com/package/sharp), a high performance Node.js image processing module. ## Install `$ npm install sharp-cli` ## Usage ``` sharp <options> [command..] Commands: sharp affine <matrix..> Perform an affine transform on an image sharp bandbool <operator> Perform a bitwise boolean operation on all input image channels (bands) to produce a single channel output image sharp blur [sigma] Blur the image sharp boolean <operand> <operator> Perform a bitwise boolean operation with operand image sharp clahe <width> <height> Perform contrast limiting adaptive histogram equalization CLAHE sharp composite [images..] Composite image(s) over the processed (resized, extracted etc.) image sharp convolve <width> <height> <kernel..> Convolve the image with the specified kernel sharp ensureAlpha [alpha] Ensure the output image has an alpha transparency channel sharp extend <top> <bottom> <left> <right> Extends/pads the edges of the image with the provided background colour sharp extract <top> <left> <width> <height> Extract a region of the image sharp extractChannel <channel> Extract a single channel from a multi-channel image sharp flatten [background] Merge alpha transparency channel, if any, with a background sharp flip Flip the image about the vertical Y axis sharp flop Flop the image about the horizontal X axis sharp gamma [gamma] [gammaOut] Apply a gamma correction by reducing the encoding (darken) pre-resize then increasing the encoding (brighten) post-resize sharp greyscale Convert to 8-bit greyscale; 256 shades of grey [aliases: grayscale] sharp joinChannel <images..> Join one or more channels to the image sharp linear [multiplier..] Apply the linear formula a × input + b to the image to adjust image levels sharp median [size] Apply median filter sharp modulate Transforms the image using brightness, saturation, hue rotation, and lightness sharp negate Produce the "negative" of the image sharp normalise Enhance output image contrast by stretching its luminance to cover the full dynamic range [aliases: normalize] sharp pipelineColourspace <colourspace> Set the pipeline colourspace [aliases: pipelineColorspace] sharp recomb <matrix..> Recomb the image with the specified matrix sharp removeAlpha Remove alpha channel, if any sharp resize [width] [height] Resize image to width, height, or width × height sharp rotate [angle] Rotate the output image sharp sharpen [sigma] Sharpen the image sharp threshold [value] Any pixel value greather than or equal to the threshold value will be set to 255, otherwise it will be set to 0 sharp tint <rgb> Tint the image using the provided chroma while preserving the image luminance sharp tile [size] Use tile-based deep zoom (image pyramid) output sharp toColourspace <colourspace> Set the output colourspace [aliases: toColorspace] sharp trim [threshold] Trim pixels from all edges that contain values similar to the given background color, which defaults to that of the top-left pixel sharp unflatten Ensure the image has an alpha channel with all white pixel values made fully transparent Global Options -i, --input Path to (an) image file(s) [array] [required] [default: stdin] -o, --output Directory or URI template to write the image files to [string] [required] [default: stdout] --timeout Number of seconds after which processing will be stopped [number] Input Options --animated Read all frames/pages of an animated image [boolean] --failOn Level of sensitivity to invalid images [choices: "none", "truncated", "error", "warning"] [default: warning] --density DPI for vector images [number] [default: 72] --ignoreIcc Should the embedded ICC profile, if any, be ignored [boolean] [default: false] --level Level to extract from a multi-level input (OpenSlide), zero based [number] --limitInputPixels Do not process input images where the number of pixels (width x height) exceeds this limit [number] [default: 268402689] --page Page number to start extracting from for multi-page input [number] --pages Number of pages to extract for multi-page input [number] [default: 1] --sequentialRead Use sequential rather than random access where possible [boolean] [default: false] --subifd subIFD to extract for OME-TIFF [number] [default: -1] --unlimited Remove safety features that help prevent memory exhaustion [boolean] Output Options -c, --compressionLevel zlib compression level [number] [default: 6] -f, --format Force output to a given format [choices: "avif", "gif", "heif", "jpeg", "jpg", "png", "raw", "tiff", "webp"] [default: input] -m, --metadata, --withMetadata Include all metadata (EXIF, XMP, IPTC) from the input image in the output image [boolean] --metadata.density Number of pixels per inch (DPI) [number] --metadata.exif Object keyed by IFD0, IFD1 etc. of key/value string pairs to write as EXIF data [default: {}] --metadata.icc Filesystem path to output ICC profile [string] [default: sRGB] --metadata.orientation Used to update the EXIF Orientation tag [number] -p, --progressive Use progressive (interlace) scan [boolean] -q, --quality Quality [number] [default: 80] Optimization Options --adaptiveFiltering Use adaptive row filtering [boolean] --alphaQuality Quality of alpha layer [number] [default: 80] --bitdepth Reduce bitdepth to 1, 2, or 4 bit [choices: 1, 2, 4, 8] [default: 8] --chromaSubsampling Set to "4:4:4" to prevent chroma subsampling when quality <= 90 [string] [default: 4:4:4 (AVIF) / 4:2:0] --colors, --colours Maximum number of palette entries [number] [default: 256] --compression Compression options [choices: "ccittfax4", "deflate", "jpeg", "jp2k", "lzw", "none", "packbits", "webp", "zstd"] [default: "jpeg"] --delay Delay(s) between animation frames [number] --dither Level of Floyd-Steinberg error diffusion [number] [default: 1.0] --effort Level of CPU effort to reduce file size [number] [default: 7 (GIF, PNG) / 4] --hbitdepth Set bitdepth to 8, 10, or 12 bit [choices: 8, 10, 12] [default: 8] --hcompression Compression format [choices: "hevc", "av1"] [default: "av1"] --interFrameMaxError Maximum inter-frame error for transparency [number] --interPaletteMaxError Maximum inter-palette error for palette reuse [number] --loop Number of animation iterations [number] [default: 0] --lossless Use lossless compression mode [boolean] --miniswhite Write 1-bit images as miniswhite [boolean] --minSize Prevent use of animation key frames to minimize file size [boolean] --mixed Allow mixture of lossy and lossless animation frames [boolean] --mozjpeg Use mozjpeg defaults [boolean] --nearLossless Use near_lossless compression mode [boolean] --optimise, --optimize Apply optimiseScans, overshootDeringing, and trellisQuantisation [boolean] --optimiseCoding, --optimizeCoding Optimise Huffman coding tables [boolean] [default: true] --optimiseScans, --optimizeScans Optimise progressive scans [boolean] --overshootDeringing Apply overshoot deringing [boolean] --palette Quantise to a palette-based image with alpha transparency support [boolean] --predictor Compression predictor [choices: "float", "horizontal", "none"] [default: "horizontal"] --preset Named preset for preprocessing/filtering [choices: "default", "photo", "picture", "drawing", "icon", "text"] [default: "default"] --pyramid Write an image pyramid [boolean] --quantisationTable, --quantizationTable Quantization table to use [number] [default: 0] --reuse, --reoptimise, --reoptimize Always generate new palettes (slow) [boolean] --resolutionUnit Resolution unit [choices: "cm", "inch"] [default: inch] --smartSubsample High quality chroma subsampling [boolean] --tileBackground Background colour, parsed by the color module [string] [default: rgba(255, 255, 255, 1)] --tileHeight Vertical tile size [number] --tileWidth Horizontal tile size [number] --trellisQuantisation Apply trellis quantisation [boolean] --xres Horizontal resolution [number] [default: 1.0] --yres Vertical resolution [number] [default: 1.0] Misc. Options -h, --help Show help [boolean] -v, --version Show version number [boolean] Examples: sharp -i ./input.jpg -o ./out resize 300 200 out/input.jpg will be a 300 pixels wide and 200 pixels high image containing a scaled and cropped version of input.jpg sharp -i ./input.jpg -o ./out -mq90 rotate 180 -- out/input.jpg will be an upside down, 300px resize 300 -- flatten "#ff6600" -- composite wide, alpha channel flattened onto orange ./overlay.png --gravity southeast -- sharpen background, composited with overlay.png with SE gravity, sharpened, with metadata, 90% quality version of input.jpg sharp -i ./input.jpg -o ./out --metadata Include all metadata in the output image sharp -i ./input.jpg -o ./out Set "IFD0-Copyright" in output EXIF metadata --metadata.exif.IFD0.Copyright "Wernham Hogg" sharp -i ./input.jpg -o ./out --metadata.density Set output metadata to 96 DPI 96 For more information on available options, please visit https://sharp.pixelplumbing.com/ ``` ## Input and output * The CLI supports input streams. * [Glob](https://www.npmjs.com/package/glob) patterns are allowed, for example `--input './images/**/*.jpg'`. Make sure you quote the pattern when using the CLI. * Supported output macros: `{root}`, `{dir}`, `{base}`, `{name}`, and `{ext}` (from [Node.js path](https://nodejs.org/api/path.html#path_path_parse_path)), for example: `--output {dir}` will overwrite original files. ``` ┌─────────────────────┬────────────┐ │ dir │ base │ ├──────┬ ├──────┬─────┤ │ root │ │ name │ ext │ " / home/user/dir / file .txt " └──────┴──────────────┴──────┴─────┘ ``` ## Related * [sharp](http://sharp.pixelplumbing.com/) - API for this module ## Changelog See the [Changelog](./CHANGELOG.md) for a list of changes. ## License The MIT License (MIT) Copyright (c) 2019 Mark van Seventer Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.