kangfenmao
80f49aecd7
- Added conditional registration of the system OCR service for non-Linux platforms. - Updated SystemOcrService to handle Linux by returning an empty text response. - Modified image preprocessing to dynamically require the 'sharp' library, improving compatibility and performance. - Included additional files in the electron-builder configuration for packaging.
29 lines
823 B
TypeScript
29 lines
823 B
TypeScript
import { ImageFileMetadata } from '@types'
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import { readFile } from 'fs/promises'
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const preprocessImage = async (buffer: Buffer): Promise<Buffer> => {
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const sharp = require('sharp')
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return sharp(buffer)
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.grayscale() // 转为灰度
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.normalize()
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.sharpen()
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.png({ quality: 100 })
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.toBuffer()
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}
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/**
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* 加载并预处理OCR图像
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* @param file - 图像文件元数据
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* @returns 预处理后的图像Buffer
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* @throws {Error} 当文件不存在或无法读取时抛出错误；当图像预处理失败时抛出错误
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*
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* 预处理步骤:
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* 1. 读取图像文件
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* 2. 转换为灰度图
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* 3. 后续可扩展其他预处理步骤
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*/
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export const loadOcrImage = async (file: ImageFileMetadata): Promise<Buffer> => {
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const buffer = await readFile(file.path)
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return preprocessImage(buffer)
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}
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