Apply 78e6f601 + keep DPIAdjusting

dan/manager/dataset.py

dan/manager/ocr.py

dan/ocr/document/train.py

dan/transforms.py

docs/assets/augmentations/document_color_jitter.png

docs/assets/augmentations/document_downscale.png

docs/assets/augmentations/document_dropout.png

docs/assets/augmentations/document_elastic.png

docs/assets/augmentations/document_erosion_dilation.png

docs/assets/augmentations/document_full_pipeline.png

docs/assets/augmentations/document_full_pipeline_2.png

docs/assets/augmentations/document_gaussian_blur.png

docs/assets/augmentations/document_gaussian_noise.png

docs/assets/augmentations/document_grayscale.png

docs/assets/augmentations/document_perspective.png

docs/assets/augmentations/document_piecewise.png

docs/assets/augmentations/document_sharpen.png

docs/assets/augmentations/document_shearx.png

docs/assets/augmentations/line_color_jitter.png

docs/assets/augmentations/line_downscale.png