图像色值处理工具

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ImageColorUtils

描述

图像色值处理工具,基于图片色值量化算法提供取色色值相似度对比色彩边界检测等能力。

image-color-utils.gif

demo

codesandbox

demo4.gif

Install

npm install image-color-utils --save

Usage

es
import { ImageColorUtils } from 'image-color-utils'
commonjs
const { ImageColorUtils } = require('image-color-utils')

API

# ImageColorUtils

import { ImageColorUtils } from 'image-color-utils'

const params = {
  origin: img,
  width: canvas.width,
  height: canvas.height,
  boundaryValue,
  mockMovePx,
  onload,
}
const imageColorUtils = new ImageColorUtils(params)
Arguments
NameDescTypeDefaultrequired
origin数据源(可以是 http链接 / ImageBitmap / HTMLImageElement )string / HTMLImageElement / ImageBitmap /-true
width画板宽度number-false (不传参将根据图片宽高自适应,origin 为 ImageBitmap / HTMLImageElemen,必填)
height画板高度number-false (不传参将根据图片宽高自适应,origin 为 ImageBitmap / HTMLImageElemen,必填)
mockMovePx边界扫描距离(最大边界扫描距离, 扫描方向由内向外)number30false
boundaryValue色彩边界阈值(作用于色值相似度对比, 阈值越高,相似条件越高)number10false
onload加载完成()=>void-false
Returns
DescType
ImageColorUtils实例Object

# pickColor - 提取单个色值

import { ImageColorUtils } from 'image-color-utils'


const imageColorUtils = new ImageColorUtils({
  origin: img,
  width: canvas.width,
  height: canvas.height
})
const res = imageColorUtils.pickColor(x, y)
Arguments
NameDescTypeDefaultrequired
x目标点距离画布左上角x坐标number-true
y目标点距离画布左上角y坐标number-true
Returns
DescType
目标点 rgb 色值number[]

# pickColors - 提取图片色值

import { ImageColorUtils } from 'image-color-utils'


const imageColorUtils = new ImageColorUtils({
  origin: img,
  width: canvas.width,
  height: canvas.height
})
const res = imageColorUtils.pickColors()
Returns
Returns
DescType
图片色值{rgb: string[], hex: string[] }

# adjust - 色彩边缘计算

import { ImageColorUtils } from 'image-color-utils'

const imageColorUtils = new ImageColorUtils({ 
  origin: img,
  width: canvas.width, 
  height: canvas.height,  
  boundaryValue,
  mockMovePx
})
imageColorUtils.adjust(leftTopPosition, rightBottomPosition)
Arguments
NameDescTypeDefaultrequired
leftTopPosition图片所选区域初始左上角坐标number[][]false
rightBottomPosition图片所选区域初始右下角坐标number[][]false
Returns
DescType
边界计算后左上角坐标(x,y)及区域宽高(width,height)Object:{x: number, y: number, width: number, height: number}

# compare - 色值相似度对比

import { ImageColorUtils } from 'image-color-utils'

const res = ImageColorUtils.compare(color1, color2, boundaryValue, type)
Arguments
NameDescTypeDefaultrequired
color1rgb 色值1number[]-true
color2rgb 色值2number[]-true
boundaryValue色彩边界阈值(作用于色值相似度对比, 阈值越高,相似条件越高)number10false
type颜色模型'rgb' or 'lab''rgb'true
Returns
DescType
是否相似boolean

# hex2rgb - HEX色值转RGB色值

import { hex2rgb } from 'image-color-utils'

const rgb = hex2rgb(hex)
Arguments
NameDescTypeDefaultrequired
hexHEX色值String-true
Returns
DescType
RGB色值number[]

# rgb2hex - RGB色值转HEX色值

import { rgb2hex } from 'image-color-utils'

const hex = rgb2hex(rgb)
Arguments
NameDescTypeDefaultrequired
rgbRGB色值number[]-true
Returns
DescType
HEX色值string

Attribute

import { ImageColorUtils } from 'image-color-utils'

const imageColorUtils = new ImageColorUtils({ 
  origin: img,
  width: canvas.width,
  height: canvas.height,
  boundaryValue,
  mockMovePx
})

console.log(imageColorUtils.canvas)
console.log(imageColorUtils.ctx)
console.log(imageColorUtils.imageData)
NameType
canvasOffscreenCanvas
ctxOffscreenCanvasRenderingContext2D
imageDataImageData