80 lines
2.3 KiB
Rust
80 lines
2.3 KiB
Rust
//! OCR 构建器。
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use crate::ocr::executor::Ocr;
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// use ddddocr_tract::session::OcrSession;
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use crate::traits::OcrEngine;
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use crate::ocr::color_filter::ColorFilter;
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use crate::ocr::token_filter::TokenFilter;
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/// OCR 构建器：配置识别选项后绑定引擎会话构建 [`crate::Ocr`]。
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#[derive(Default)]
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pub struct OcrBuilder {
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/// 是否修复PNG格式问题
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png_fix: bool,
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/// 是否返回概率信息
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probability: bool,
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/// 颜色过滤：保留的颜色列表
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color_filter: Option<Box<dyn ColorFilter + Send + Sync>>,
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/// 字符集范围
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charset_restrict: Option<Box<dyn TokenFilter + Send + Sync>>,
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}
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impl OcrBuilder {
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// 初始化任务，设置默认参数
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pub fn new() -> Self {
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Self {
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png_fix: false, // 默认值
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probability: false,
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color_filter: None,
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charset_restrict: None,
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}
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}
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pub fn png_fix(mut self, value: bool) -> Self {
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self.png_fix = value;
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self
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}
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pub fn probability(mut self, value: bool) -> Self {
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self.probability = value;
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self
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}
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pub fn color_filter<T>(mut self, filter: T) -> Self
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where
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T: ColorFilter + Send + Sync + 'static,
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{
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self.color_filter = Some(Box::new(filter));
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self
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}
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pub fn charset_restrict<T>(mut self, restrict: T) -> Self
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where
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T: TokenFilter + Send + Sync + 'static,
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{
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self.charset_restrict = Some(Box::new(restrict));
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self
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}
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/// 绑定引擎会话并构建 OCR 识别器。
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pub fn build_with<E: OcrEngine>(self, runtime: &E) -> Ocr<'_> {
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// 1. 原地解析颜色过滤器
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let final_color_ranges = match &self.color_filter {
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Some(filter) => filter.collect_to_vec(),
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None => Ok(None),
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};
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// 2. 原地解析字符集过滤
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let tokens = &runtime.metadata().charset.tokens;
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let final_charset_indices = match &self.charset_restrict {
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Some(restrict) => restrict.apply_to_charset(tokens),
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None => None,
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};
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// Ocr::new(session, self)
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Ocr {
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runtime,
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png_fix: self.png_fix, // 原地解构出来
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probability: self.probability,
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final_color_ranges,
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final_charset_indices,
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}
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}
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}
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