THotPDF.ApplyLoadedOCRTextLayer Method

Renders selected pages, invokes a caller-supplied OCR engine, validates the recognised words, and atomically commits an invisible searchable text layer

声明

function ApplyLoadedOCRTextLayer(
    const PageIndices: array of Integer;
    const Engine: IHPDFOCREngine;
    const Options: THPDFOCRTextLayerOptions;
    out Info: THPDFOCRTextLayerInfo): boolean;

参数

• PageIndices supplies zero-based page indices, with an empty array selecting all loaded pages and duplicates removed
• Engine is the synchronous recogniser and must not be nil
• Options controls rendering, confidence, existing-text handling, optional-content grouping, budgets, and cancellation
• Info receives status, diagnostics, counters, and resource totals for every outcome

结果

返回 True for a committed layer or a successful run with no accepted words

返回 False for invalid options, engine failure, exhausted budgets, cancellation, or commit failure without publishing a partial object graph

The engine runs on the calling thread and receives each page bitmap only for the duration of its Recognize call

Searchable OCR Text Layers