Lists all JPEG tag identifiers.
Values:
| IGMDTAG_ID_JPG_FORMAT | JPEG metadata format identifier. |
| IGMDTAG_ID_JPG_JFIF_HEADER | JFIF header. |
| IGMDTAG_ID_JPG_JFIF_VERSION | JFIF version. |
| IGMDTAG_ID_JPG_JFIF_UNITS | JFIF resolution unit. |
| IGMDTAG_ID_JPG_JFIF_X_RES | JFIF X resolution. |
| IGMDTAG_ID_JPG_JFIF_Y_RES | JFIF Y resolution. |
| IGMDTAG_ID_JPG_THUMB_WIDTH | JFIF thumbnail width. |
| IGMDTAG_ID_JPG_THUMB_HEIGHT | JFIF thumbnail height. |
| IGMDTAG_ID_JPG_THUMB_DATA | JFIF thumbnail data. Used internally. |
| IGMDTAG_ID_JPG_JFIF_EX_HEADER | JFIF extension header. |
| IGMDTAG_ID_JPG_JFIF_EX_CODE | JFIF extension code. |
| IGMDTAG_ID_JPG_FRAME_PRECISION | SOF Precision. |
| IGMDTAG_ID_JPG_FRAME_LINES | SOF Lines. |
| IGMDTAG_ID_JPG_FRAME_SAMPPL | SOF Samples Per Line. |
| IGMDTAG_ID_JPG_FRAME_COMPS | SOF Number of components. |
| IGMDTAG_ID_JPG_SCAN_COMPS | Number of components in the scan. |
| IGMDTAG_ID_JPG_SCAN_SP_START | Scan spectral start. |
| IGMDTAG_ID_JPG_SCAN_SP_END | Scan spectral end. |
| IGMDTAG_ID_JPG_SCAN_AH_AL | Scan AH, AL. |
| IGMDTAG_ID_JPG_PHOT_HEADER | Photoshop resources identifier. |
| IGMDTAG_ID_JPG_SOF0_SIZE | SOF0 segment size. |
| IGMDTAG_ID_JPG_SOF1_SIZE | SOF1 segment size. |
| IGMDTAG_ID_JPG_SOF2_SIZE | SOF2 segment size. |
| IGMDTAG_ID_JPG_SOF3_SIZE | SOF3 segment size. |
| IGMDTAG_ID_JPG_DHT_SIZE | DHT segment size. |
| IGMDTAG_ID_JPG_SOS_SIZE | SOS segment size. |
| IGMDTAG_ID_JPG_DQT_SIZE | DQT segment size. |
| IGMDTAG_ID_JPG_APP0_SIZE | APP0 segment size. |
| IGMDTAG_ID_JPG_APP1_SIZE | APP1 segment size. |
| IGMDTAG_ID_JPG_APP2_SIZE | APP2 segment size. |
| IGMDTAG_ID_JPG_APP3_SIZE | APP3 segment size. |
| IGMDTAG_ID_JPG_APP4_SIZE | APP4 segment size. |
| IGMDTAG_ID_JPG_APP5_SIZE | APP5 segment size. |
| IGMDTAG_ID_JPG_APP6_SIZE | APP6 segment size. |
| IGMDTAG_ID_JPG_APP7_SIZE | APP7 segment size. |
| IGMDTAG_ID_JPG_APP8_SIZE | APP8 segment size. |
| IGMDTAG_ID_JPG_APP9_SIZE | APP9 segment size. |
| IGMDTAG_ID_JPG_APP10_SIZE | APP10 segment size. |
| IGMDTAG_ID_JPG_APP11_SIZE | APP11 segment size. |
| IGMDTAG_ID_JPG_APP12_SIZE | APP12 segment size. |
| IGMDTAG_ID_JPG_APP13_SIZE | APP13 segment size. |
| IGMDTAG_ID_JPG_APP14_SIZE | APP14 segment size. |
| IGMDTAG_ID_JPG_APP15_SIZE | APP15 segment size. |
| IGMDTAG_ID_JPG_COM_SIZE | COM segment size. |
| IGMDTAG_ID_JPG_SOF0 | Baseline DCT. |
| IGMDTAG_ID_JPG_SOF1 | Extended sequential DCT. |
| IGMDTAG_ID_JPG_SOF2 | Progressive DCT. |
| IGMDTAG_ID_JPG_SOF3 | Lossless (sequential). |
| IGMDTAG_ID_JPG_DHT | Huffman tables. |
| IGMDTAG_ID_JPG_SOS | Start of Segment. |
| IGMDTAG_ID_JPG_DQT | Quantization tables. |
| IGMDTAG_ID_JPG_DRI | Restart Interval. |
| IGMDTAG_ID_JPG_APP0 | Application marker - JFIF header (APP0). |
| IGMDTAG_ID_JPG_APP1 | Application marker - first. |
| IGMDTAG_ID_JPG_APP2 | Application marker - 2. |
| IGMDTAG_ID_JPG_APP3 | Application marker - 3. |
| IGMDTAG_ID_JPG_APP4 | Application marker - 4. |
| IGMDTAG_ID_JPG_APP5 | Application marker - 5. |
| IGMDTAG_ID_JPG_APP6 | Application marker - 6. |
| IGMDTAG_ID_JPG_APP7 | Application marker - 7. |
| IGMDTAG_ID_JPG_APP8 | Application marker - 8. |
| IGMDTAG_ID_JPG_APP9 | Application marker - 9. |
| IGMDTAG_ID_JPG_APP10 | Application marker - 10. |
| IGMDTAG_ID_JPG_APP11 | Application marker - 11. |
| IGMDTAG_ID_JPG_APP12 | Application marker - 12. |
| IGMDTAG_ID_JPG_APP13 | Application marker - 13. |
| IGMDTAG_ID_JPG_APP14 | Application marker - 14. |
| IGMDTAG_ID_JPG_APP15 | Application marker - last. |
| IGMDTAG_ID_JPG_COM | Comment value. |