transforms

Chain transforms into one callable (works on tensors or samples).

Crop a centred height x width window (Albumentations CenterCrop).

Flip left-right with probability p (Albumentations HorizontalFlip).

Scale so the longer side equals max_size (Albumentations LongestMaxSize).

Crop a random height x width window (Albumentations RandomCrop).

Crop a random area/aspect region then resize to height x width.

Resize to an exact height x width (Albumentations Resize).

Scale so the shorter side equals max_size (Albumentations SmallestMaxSize).

Flip top-bottom with probability p (Albumentations VerticalFlip).

Box (mean) blur with a random odd kernel size (Albumentations Blur).

Disk-kernel (out-of-focus) blur (Albumentations Defocus).

Downscale then upscale to lose high-frequency detail (Albumentations Downscale).

Gaussian blur with random kernel size and sigma (Albumentations GaussianBlur).

Additive Gaussian noise (Albumentations GaussNoise).

Camera-sensor-like noise (Albumentations ISONoise, approximate).

Median filter with a random odd kernel (Albumentations MedianBlur).

Directional (linear streak) motion blur (Albumentations MotionBlur).

Multiply pixel values by random noise (Albumentations MultiplicativeNoise).

Radial zoom blur via averaged centre-zoomed copies (Albumentations ZoomBlur).

Apply exactly one child, sampled by child-p weight (Albumentations OneOf).

Apply first with probability p else second (Albumentations OneOrOther).

Compose that records applied params for deterministic replay.

Apply all children in order, gated by p (Albumentations Sequential).

Apply n randomly-chosen children (Albumentations SomeOf).

Random crop guaranteed to contain every bounding box (Albumentations BBoxSafeRandomCrop).

Apply user callables per target type (Albumentations Lambda).

Drop random mask label regions from image + mask (Albumentations MaskDropout).

Crop a window around the first bounding box (Albumentations RandomCropNearBBox).

Box-safe crop then resize to a fixed output size (Albumentations RandomSizedBBoxSafeCrop).

Contrast-limited adaptive histogram equalization (Albumentations CLAHE).

Replace random channels with a constant fill value (Albumentations ChannelDropout).

Randomly permute the RGB channel order (Albumentations ChannelShuffle).

Emboss an image via a 3x3 directional gradient kernel (Albumentations Emboss).

Per-channel histogram equalization (Albumentations Equalize).

AlexNet-style PCA colour augmentation (Krizhevsky 2012, Albumentations FancyPCA).

Random hue / saturation / value shift (Albumentations HueSaturationValue).

Invert pixel intensities via 1 - img (Albumentations InvertImg).

Randomly set individual pixels to a fill value (Albumentations PixelDropout).

Reduce bits per channel (Albumentations Posterize).

Randomly perturb brightness only (Albumentations RandomBrightness).

Randomly perturb brightness and contrast jointly (Albumentations RandomBrightnessContrast).

Randomly perturb contrast only (Albumentations RandomContrast).

Random gamma correction (Albumentations RandomGamma).

Apply a random S-shaped tone curve around midtones (Albumentations RandomToneCurve).

Add per-channel additive shifts to an RGB image (Albumentations RGBShift).

Simulate ringing / overshoot artefacts via a high-pass kernel (Albumentations RingingOvershoot).

Sharpen an image via a 3x3 unsharp kernel blend (Albumentations Sharpen).

Invert pixel intensities above a threshold (Albumentations Solarize).

Convert an RGB image to grayscale while keeping 3 channels (Albumentations ToGray).

Apply the canonical sepia-tone colour matrix (Albumentations ToSepia).

Unsharp-mask sharpen via img + alpha*(img - blur) (Albumentations UnsharpMask).

Mask random horizontal and vertical bands of the image (Albumentations XYMasking).

Crop a fixed region [x_min, y_min, x_max, y_max) (Albumentations Crop).

Crop (negative) or pad (positive) every side by px pixels.

Pad to at least min_height x min_width (Albumentations PadIfNeeded).

Random-size crop then resize (Albumentations RandomSizedCrop).

Elastic deformation (Simard 2003; Albumentations ElasticTransform).

Grid distortion (Albumentations GridDistortion).

Grid-based elastic deformation (Albumentations GridElasticDeform).

Radial (barrel / pincushion) distortion (Albumentations OpticalDistortion).

Drop several random rectangles (Albumentations CoarseDropout).

Drop a regular grid of squares (Albumentations GridDropout).

Erase a random rectangular region of the image (Zhong et al., 2017).

Resampling mode for resize-style transforms.

Randomly jitter brightness/contrast/saturation/hue.

Scale a [0, 1] image back up by max_value (Albumentations FromFloat).

Normalize an image (Albumentations Normalize).

Scale an integer-range image to [0, 1] (Albumentations ToFloat).

Resolver mirroring Hugging Face's AutoImageProcessor.

Object-detection preset — coordinates ride with the image.

Standard ImageNet classification inference preset.

Standard ImageNet classification training preset (augmentation).

Keypoint / pose-estimation preset.

Semantic-segmentation preset — image + mask share geometry.

General affine: scale / translate / rotate / shear (Albumentations Affine).

Random element of the dihedral group D4 (Albumentations D4).

Flip around a random axis (Albumentations Flip).

Random four-point perspective warp (Albumentations Perspective).

Split into a grid and shuffle the cells (Albumentations RandomGridShuffle).

Rotate by a random multiple of 90° (Albumentations RandomRotate90).

Resize by a random factor, aspect preserved (Albumentations RandomScale).

Rotate by a random angle in [-limit, limit] (Albumentations Rotate).

Rotate by a random angle, expanding the canvas to keep all content (Albumentations SafeRotate).

Random shift + scale + rotation (Albumentations ShiftScaleRotate).

Swap the H and W axes with probability p (Albumentations Transpose).