Why Go
- Case Studies
  
  Common problems companies solve with Go
- Use Cases
  
  Stories about how and why companies use Go
- Security Policy
  
  How Go can help keep you secure by default
Learn
Docs
- Effective Go
  
  Tips for writing clear, performant, and idiomatic Go code
- Go User Manual
  
  A complete introduction to building software with Go
- Standard library
  
  Reference documentation for Go's standard library
- Release Notes
  
  Learn what's new in each Go release
Packages
Community
- Recorded Talks
  
  Videos from prior events
- Meetups
  
  Meet other local Go developers
- Conferences
  
  Learn and network with Go developers from around the world
- Go blog
  
  The Go project's official blog.
- Go project
  
  Get help and stay informed from Go
- Get connected

imaging

package

Go to main page

Versions in this module

v0

v0.10.3

Mar 12, 2025

v0.10.2

Mar 10, 2025

v0.10.2-b1

Mar 10, 2025

v0.10.1

Mar 10, 2025

v0.10.0

Feb 26, 2025

v0.9.11

Feb 25, 2025

v0.9.10

Feb 18, 2025

v0.9.9

Feb 12, 2025

v0.9.8

Dec 27, 2024

v0.9.7

Nov 29, 2024

v0.9.6

Oct 30, 2024

v0.9.5

Oct 22, 2024

Changes in this version

+ var ErrUnsupportedFormat = errors.New("imaging: unsupported image format")

+ func AdjustBrightness(img image.Image, percentage float64) *image.NRGBA

+ func AdjustContrast(img image.Image, percentage float64) *image.NRGBA

+ func AdjustFunc(img image.Image, fn func(c color.NRGBA) color.NRGBA) *image.NRGBA

+ func AdjustGamma(img image.Image, gamma float64) *image.NRGBA

+ func AdjustHue(img image.Image, shift float64) *image.NRGBA

+ func AdjustSaturation(img image.Image, percentage float64) *image.NRGBA

+ func AdjustSigmoid(img image.Image, midpoint, factor float64) *image.NRGBA

+ func Blur(img image.Image, sigma float64) *image.NRGBA

+ func Clone(img image.Image) *image.NRGBA

+ func Convolve3x3(img image.Image, kernel [9]float64, options *ConvolveOptions) *image.NRGBA

+ func Convolve5x5(img image.Image, kernel [25]float64, options *ConvolveOptions) *image.NRGBA

+ func Crop(img image.Image, rect image.Rectangle) *image.NRGBA

+ func CropAnchor(img image.Image, width, height int, anchor Anchor) *image.NRGBA

+ func CropCenter(img image.Image, width, height int) *image.NRGBA

+ func Decode(r io.Reader, opts ...DecodeOption) (image.Image, error)

+ func Encode(w io.Writer, img image.Image, format Format, opts ...EncodeOption) error

+ func Fill(img image.Image, width, height int, anchor Anchor, filter ResampleFilter) *image.NRGBA

+ func Fit(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA

+ func FlipH(img image.Image) *image.NRGBA

+ func FlipV(img image.Image) *image.NRGBA

+ func Grayscale(img image.Image) *image.NRGBA

+ func Histogram(img image.Image) [256]float64

+ func Invert(img image.Image) *image.NRGBA

+ func New(width, height int, fillColor color.Color) *image.NRGBA

+ func Open(filename string, opts ...DecodeOption) (image.Image, error)

+ func Overlay(background, img image.Image, pos image.Point, opacity float64) *image.NRGBA

+ func OverlayCenter(background, img image.Image, opacity float64) *image.NRGBA

+ func Paste(background, img image.Image, pos image.Point) *image.NRGBA

+ func PasteCenter(background, img image.Image) *image.NRGBA

+ func Resize(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA

+ func Rotate(img image.Image, angle float64, bgColor color.Color) *image.NRGBA

+ func Rotate180(img image.Image) *image.NRGBA

+ func Rotate270(img image.Image) *image.NRGBA

+ func Rotate90(img image.Image) *image.NRGBA

+ func Save(img image.Image, filename string, opts ...EncodeOption) (err error)

+ func SetMaxProcs(value int)

+ func Sharpen(img image.Image, sigma float64) *image.NRGBA

+ func Thumbnail(img image.Image, width, height int, filter ResampleFilter) *image.NRGBA

+ func Transpose(img image.Image) *image.NRGBA

+ func Transverse(img image.Image) *image.NRGBA

+ type Anchor int

+ const Bottom

+ const BottomLeft

+ const BottomRight

+ const Center

+ const Left

+ const Right

+ const Top

+ const TopLeft

+ const TopRight

+ type ConvolveOptions struct

+ Abs bool

+ Bias int

+ Normalize bool

+ type DecodeOption func(*decodeConfig)

+ func AutoOrientation(enabled bool) DecodeOption

+ type EncodeOption func(*encodeConfig)

+ func GIFDrawer(drawer draw.Drawer) EncodeOption

+ func GIFNumColors(numColors int) EncodeOption

+ func GIFQuantizer(quantizer draw.Quantizer) EncodeOption

+ func JPEGQuality(quality int) EncodeOption

+ func PNGCompressionLevel(level png.CompressionLevel) EncodeOption

+ type Format int

+ const BMP

+ const GIF

+ const JPEG

+ const PNG

+ const TIFF

+ func FormatFromExtension(ext string) (Format, error)

+ func FormatFromFilename(filename string) (Format, error)

+ func (f Format) String() string

+ type ResampleFilter struct

+ Kernel func(float64) float64

+ Support float64

+ var BSpline ResampleFilter

+ var Bartlett ResampleFilter

+ var Blackman ResampleFilter

+ var Box ResampleFilter

+ var CatmullRom ResampleFilter

+ var Cosine ResampleFilter

+ var Gaussian ResampleFilter

+ var Hamming ResampleFilter

+ var Hann ResampleFilter

+ var Hermite ResampleFilter

+ var Lanczos ResampleFilter

+ var Linear ResampleFilter

+ var MitchellNetravali ResampleFilter

+ var NearestNeighbor ResampleFilter

+ var Welch ResampleFilter