Operators are a collection of basic processes that assist in data modification, cleaning, filtering, deduplication, etc. We support a wide range of data sources and file formats, and allow for flexible extension to custom datasets.
This page offers a basic description of the operators (OPs) in Data-Juicer. Users can refer to the API documentation for the specific parameters of each operator. Users can refer to and run the unit tests (tests/ops/...) for examples of operator-wise usage as well as the effects of each operator when applied to built-in test data samples.
The operators in Data-Juicer are categorized into 5 types.
| Type | Number | Description |
|---|---|---|
| Formatter | 7 | Discovers, loads, and canonicalizes source data |
| Mapper | 43 | Edits and transforms samples |
| Filter | 41 | Filters out low-quality samples |
| Deduplicator | 5 | Detects and removes duplicate samples |
| Selector | 4 | Selects top samples based on ranking |
All the specific operators are listed below, each featured with several capability tags.
- Domain Tags
- General: general purpose
- LaTeX: specific to LaTeX source files
- Code: specific to programming codes
- Financial: closely related to financial sector
- Image: specific to images or multimodal
- Audio: specific to audios or multimodal
- Video: specific to videos or multimodal
- Multimodal: specific to multimodal
- Language Tags
- en: English
- zh: Chinese
| Operator | Domain | Lang | Description |
|---|---|---|---|
| remote_formatter | General | en, zh | Prepares datasets from remote (e.g., HuggingFace) |
| csv_formatter | General | en, zh | Prepares local .csv files |
| tsv_formatter | General | en, zh | Prepares local .tsv files |
| json_formatter | General | en, zh | Prepares local .json, .jsonl, .jsonl.zst files |
| parquet_formatter | General | en, zh | Prepares local .parquet files |
| text_formatter | General | en, zh | Prepares other local text files (complete list) |
| mixture_formatter | General | en, zh | Handles a mixture of all the supported local file types |
| Operator | Domain | Lang | Description |
|---|---|---|---|
| audio_ffmpeg_wrapped_mapper | Audio | - | Simple wrapper to run a FFmpeg audio filter |
| chinese_convert_mapper | General | zh | Converts Chinese between Traditional Chinese, Simplified Chinese and Japanese Kanji (by opencc) |
| clean_copyright_mapper | Code | en, zh | Removes copyright notice at the beginning of code files (must contain the word copyright) |
| clean_email_mapper | General | en, zh | Removes email information |
| clean_html_mapper | General | en, zh | Removes HTML tags and returns plain text of all the nodes |
| clean_ip_mapper | General | en, zh | Removes IP addresses |
| clean_links_mapper | General, Code | en, zh | Removes links, such as those starting with http or ftp |
| expand_macro_mapper | LaTeX | en, zh | Expands macros usually defined at the top of TeX documents |
| fix_unicode_mapper | General | en, zh | Fixes broken Unicodes (by ftfy) |
| image_blur_mapper | Image | - | Blur images |
| image_captioning_from_gpt4v_mapper | Multimodal | - | generate samples whose texts are generated based on gpt-4-visison and the image |
| image_captioning_mapper | Multimodal | - | generate samples whose captions are generated based on another model (such as blip2) and the figure within the original sample |
| image_diffusion_mapper | Multimodal | - | Generate and augment images by stable diffusion model |
| image_face_blur_mapper | Image | - | Blur faces detected in images |
| nlpaug_en_mapper | General | en | Simply augments texts in English based on the nlpaug library |
| nlpcda_zh_mapper | General | zh | Simply augments texts in Chinese based on the nlpcda library |
| punctuation_normalization_mapper | General | en, zh | Normalizes various Unicode punctuations to their ASCII equivalents |
| remove_bibliography_mapper | LaTeX | en, zh | Removes the bibliography of TeX documents |
| remove_comments_mapper | LaTeX | en, zh | Removes the comments of TeX documents |
| remove_header_mapper | LaTeX | en, zh | Removes the running headers of TeX documents, e.g., titles, chapter or section numbers/names |
| remove_long_words_mapper | General | en, zh | Removes words with length outside the specified range |
| remove_non_chinese_character_mapper | General | en, zh | Remove non Chinese character in text samples. |
| remove_repeat_sentences_mapper | General | en, zh | Remove repeat sentences in text samples. |
| remove_specific_chars_mapper | General | en, zh | Removes any user-specified characters or substrings |
| remove_table_text_mapper | General, Financial | en | Detects and removes possible table contents (:warning: relies on regular expression matching and thus fragile) |
| remove_words_with_incorrect_ substrings_mapper |
General | en, zh | Removes words containing specified substrings |
| replace_content_mapper | General | en, zh | Replace all content in the text that matches a specific regular expression pattern with a designated replacement string |
| sentence_split_mapper | General | en | Splits and reorganizes sentences according to semantics |
| video_captioning_from_audio_mapper | Multimodal | - | Caption a video according to its audio streams based on Qwen-Audio model |
| video_captioning_from_frames_mapper | Multimodal | - | generate samples whose captions are generated based on an image-to-text model and sampled video frames. Captions from different frames will be concatenated to a single string |
| video_captioning_from_summarizer_mapper | Multimodal | - | Generate video captions by summarizing several kinds of generated texts (captions from video/audio/frames, tags from audio/frames, ...) |
| video_captioning_from_video_mapper | Multimodal | - | generate samples whose captions are generated based on another model (video-blip) and sampled video frame within the original sample |
| video_face_blur_mapper | Video | - | Blur faces detected in videos |
| video_ffmpeg_wrapped_mapper | Video | - | Simple wrapper to run a FFmpeg video filter |
| video_remove_watermark_mapper | Video | - | Remove the watermarks in videos given regions |
| video_resize_aspect_ratio_mapper | Video | - | Resize video aspect ratio to a specified range |
| video_resize_resolution_mapper | Video | - | Map videos to ones with given resolution range |
| video_split_by_duration_mapper | Multimodal | - | Mapper to split video by duration |
| video_spit_by_key_frame_mapper | Multimodal | - | Mapper to split video by key frame |
| video_split_by_scene_mapper | Multimodal | - | Split videos into scene clips |
| video_tagging_from_audio_mapper | Multimodal | - | Mapper to generate video tags from audio streams extracted from the video. |
| video_tagging_from_frames_mapper | Multimodal | - | Mapper to generate video tags from frames extracted from the video. |
| whitespace_normalization_mapper | General | en, zh | Normalizes various Unicode whitespaces to the normal ASCII space (U+0020) |
| Operator | Domain | Lang | Description |
|---|---|---|---|
| alphanumeric_filter | General | en, zh | Keeps samples with alphanumeric ratio within the specified range |
| audio_duration_filter | Audio | - | Keep data samples whose audios' durations are within a specified range |
| audio_nmf_snr_filter | Audio | - | Keep data samples whose audios' Signal-to-Noise Ratios (SNRs, computed based on Non-Negative Matrix Factorization, NMF) are within a specified range |
| audio_size_filter | Audio | - | Keep data samples whose audios' sizes are within a specified range |
| average_line_length_filter | Code | en, zh | Keeps samples with average line length within the specified range |
| character_repetition_filter | General | en, zh | Keeps samples with char-level n-gram repetition ratio within the specified range |
| flagged_words_filter | General | en, zh | Keeps samples with flagged-word ratio below the specified threshold |
| image_aesthetics_filter | Image | - | Keeps samples containing images whose aesthetics scores are within the specified range |
| image_aspect_ratio_filter | Image | - | Keeps samples containing images with aspect ratios within the specified range |
| image_face_ratio_filter | Image | - | Keeps samples containing images with face area ratios within the specified range |
| image_nsfw_filter | Image | - | Keeps samples containing images with NSFW scores below the threshold |
| image_shape_filter | Image | - | Keeps samples containing images with widths and heights within the specified range |
| image_size_filter | Image | - | Keeps samples containing images whose size in bytes are within the specified range |
| image_text_matching_filter | Multimodal | - | Keeps samples with image-text classification matching score within the specified range based on a BLIP model |
| image_text_similarity_filter | Multimodal | - | Keeps samples with image-text feature cosine similarity within the specified range based on a CLIP model |
| image_watermark_filter | Image | - | Keeps samples containing images with predicted watermark probabilities below the threshold |
| language_id_score_filter | General | en, zh | Keeps samples of the specified language, judged by a predicted confidence score |
| maximum_line_length_filter | Code | en, zh | Keeps samples with maximum line length within the specified range |
| perplexity_filter | General | en, zh | Keeps samples with perplexity score below the specified threshold |
| phrase_grounding_recall_filter | Multimodal | - | Keeps samples whose locating recalls of phrases extracted from text in the images are within a specified range |
| special_characters_filter | General | en, zh | Keeps samples with special-char ratio within the specified range |
| specified_field_filter | General | en, zh | Filters samples based on field, with value lies in the specified targets |
| specified_numeric_field_filter | General | en, zh | Filters samples based on field, with value lies in the specified range (for numeric types) |
| stopwords_filter | General | en, zh | Keeps samples with stopword ratio above the specified threshold |
| suffix_filter | General | en, zh | Keeps samples with specified suffixes |
| text_action_filter | General | en, zh | Keeps samples containing action verbs in their texts |
| text_entity_dependency_filter | General | en, zh | Keeps samples containing dependency edges for an entity in the dependency tree of the texts |
| text_length_filter | General | en, zh | Keeps samples with total text length within the specified range |
| token_num_filter | General | en, zh | Keeps samples with token count within the specified range |
| video_aesthetics_filter | Video | - | Keeps samples whose specified frames have aesthetics scores within the specified range |
| video_aspect_ratio_filter | Video | - | Keeps samples containing videos with aspect ratios within the specified range |
| video_duration_filter | Video | - | Keep data samples whose videos' durations are within a specified range |
| video_frames_text_similarity_filter | Multimodal | - | Keep data samples whose similarities between sampled video frame images and text are within a specific range |
| video_motion_score_filter | Video | - | Keep samples with video motion scores within a specific range |
| video_nsfw_filter | Video | - | Keeps samples containing videos with NSFW scores below the threshold |
| video_ocr_area_ratio_filter | Video | - | Keep data samples whose detected text area ratios for specified frames in the video are within a specified range |
| video_resolution_filter | Video | - | Keeps samples containing videos with horizontal and vertical resolutions within the specified range |
| video_watermark_filter | Video | - | Keeps samples containing videos with predicted watermark probabilities below the threshold |
| video_tagging_from_frames_filter | Video | - | Keep samples containing videos with given tags |
| words_num_filter | General | en, zh | Keeps samples with word count within the specified range |
| word_repetition_filter | General | en, zh | Keeps samples with word-level n-gram repetition ratio within the specified range |
| Operator | Domain | Lang | Description |
|---|---|---|---|
| document_deduplicator | General | en, zh | Deduplicates samples at document-level by comparing MD5 hash |
| document_minhash_deduplicator | General | en, zh | Deduplicates samples at document-level using MinHashLSH |
| document_simhash_deduplicator | General | en, zh | Deduplicates samples at document-level using SimHash |
| image_deduplicator | Image | - | Deduplicates samples at document-level using exact matching of images between documents |
| video_deduplicator | Video | - | Deduplicates samples at document-level using exact matching of videos between documents |
| ray_document_deduplicator | General | en, zh | Deduplicates samples at document-level by comparing MD5 hash on ray |
| ray_image_deduplicator | Image | - | Deduplicates samples at document-level using exact matching of images between documents on ray |
| ray_video_deduplicator | Video | - | Deduplicates samples at document-level using exact matching of videos between documents on ray |
| Operator | Domain | Lang | Description |
|---|---|---|---|
| frequency_specified_field_selector | General | en, zh | Selects top samples by comparing the frequency of the specified field |
| random_selector | General | en, zh | Selects samples randomly |
| range_specified_field_selector | General | en, zh | Selects samples within a specified range by comparing the values of the specified field |
| topk_specified_field_selector | General | en, zh | Selects top samples by comparing the values of the specified field |
We welcome contributions of adding new operators. Please refer to How-to Guide for Developers.