image-color-utils

DESC

Provide pickup color, color similarity comparison, color boundary value calculation and other capabilities。

demo

codesandbox

Install

npm install image-color-utils --save

Usage

es

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

commonjs

const { ImageColorUtils } = require('image-color-utils')

API

• ImageColorUtils
• pickColor
• pickColors
• adjust
• compare
• hex2rgb
• rgb2hex

# 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

Name	Desc	Type	Default	required
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）	number	30	false
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）	number	10	false
onload	加载完成	()=>void	-	false

Returns

Desc	Type
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

Name	Desc	Type	Default	required
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

Desc	Type
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

Desc	Type
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

Name	Desc	Type	Default	required
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

Desc	Type
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

Name	Desc	Type	Default	required
color1	rgb 色值1	number[]	-	true
color2	rgb 色值2	number[]	-	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）	number	10	false
type	颜色模型	'rgb' or 'lab'	'rgb'	true

Returns

Desc	Type
是否相似	boolean

# hex2rgb - HEX色值转RGB色值

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

const rgb = hex2rgb(hex)

Arguments

Name	Desc	Type	Default	required
hex	HEX色值	String	-	true

Returns

Desc	Type
RGB色值	number[]

# rgb2hex - RGB色值转HEX色值

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

const hex = rgb2hex(rgb)

Arguments

Name	Desc	Type	Default	required
rgb	RGB色值	number[]	-	true

Returns

Desc	Type
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)

Name	Type
canvas	OffscreenCanvas
ctx	OffscreenCanvasRenderingContext2D
imageData	ImageData