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Disk image file type used on Apple computers
A sparse image is a type of disk image file used on macOS that grows in size as the user adds data to the image, taking up only as much disk space as
Sparse_image
2025 operating system version
view previous passwords. The disc image format, formerly RAW, has been replaced by the new format Apple Sparse Image Format (ASIF), which Apple claims
MacOS_Tahoe
Technology developed by Microsoft
specify a single large image (dzi) or a collection of images (dzc). It also allows for "Sparse Images"; where some parts of the image have greater resolution
Deep_Zoom
Concept in mathematics
Sparse approximation (also known as sparse representation) theory deals with sparse solutions for systems of linear equations. Techniques for finding
Sparse_approximation
Representation learning method
Sparse dictionary learning (also known as sparse coding or SDL) is a representation learning method which aims to find a sparse representation of the
Sparse_dictionary_learning
File format developed by Apple and used by macOS
mounting on Linux. It supports UDIF and HFS/HFS+. cloop DiskImageMounter Installer (macOS) Sparse image "hdiutil(1) Mac OS X Manual Page". Archived from the
Apple_Disk_Image
Signal processing technique
property, which is sufficient for sparse signals. Compressed sensing has applications in, for example, magnetic resonance imaging (MRI) where the incoherence
Compressed_sensing
Type of computer file
supports them. Sparse files are commonly used for disk images, database snapshots, log files and in scientific applications. The advantage of sparse files is
Sparse_file
Neural network that learns efficient data encoding in an unsupervised manner
2016). "Stacked Sparse Autoencoder (SSAE) for Nuclei Detection on Breast Cancer Histopathology Images". IEEE Transactions on Medical Imaging. 35 (1): 119–130
Autoencoder
Computerized information extraction from images
field of photogrammetry. This led to methods for sparse 3-D reconstructions of scenes from multiple images. Progress was made on the dense stereo correspondence
Computer_vision
Noise in the form of sparse, random black and white pixels on digital images
digital images. For black-and-white or grayscale images, it presents as sparsely occurring white and black pixels, giving the appearance of an image sprinkled
Salt-and-pepper_noise
Medical imaging technique
enabling image reconstruction at higher acceleration factors than classical parallel imaging alone. Rather than relying on hand-crafted sparsity priors
Magnetic_resonance_imaging
File format for virtual hard disk drive containers
single file. A flat image allocates space ahead of time while a sparse image grows as the virtual machine writes to it. Flat images can use the underlying
VMDK
the imaging system is performing sparse sampling. Sparse sampling typically occurs as a way of keeping production costs low and improving image acquisition
Deep learning in photoacoustic imaging
Deep_learning_in_photoacoustic_imaging
Document search algorithm
Learned sparse retrieval (LSR) or sparse neural search is an approach to Information Retrieval which uses a sparse vector representation of queries and
Learned_sparse_retrieval
Technique in photogrammetry and computer vision
Simple Sparse Bundle Adjustment package based on the Levenberg–Marquardt Algorithm (C++). LGPL. OpenCV: Computer Vision library in the Images stitching
Bundle_adjustment
Machine learning technique
inferring over the full model is too costly. They are typically sparsely-gated, with sparsity 1 or 2. In Transformer models, the MoE layers are often used
Mixture_of_experts
measurement noise, data sparsity, image artifacts, and computational inefficiency. This approach has been applied across various imaging modalities, including
Deep tomographic reconstruction
Deep_tomographic_reconstruction
Apple disk encryption software
directory, not the startup volume. The operating system uses an encrypted sparse disk image (a large single file) to present a volume for the home directory.
FileVault
Abstract ruler in which some of the distance marks may be missing
A sparse ruler is a ruler in which some of the distance marks may be missing. More abstractly, a sparse ruler of length L {\displaystyle L} with m {\displaystyle
Sparse_ruler
macOS backup software application
folder on the designated Time Machine volume (local or inside a remote sparse image) into which it copies the directory tree of all locally attached storage
Time_Machine_(macOS)
3D computer graphics rendering technique
Checkerboard rendering or sparse rendering, also known as checkerboarding for short, is a 3D computer graphics rendering technique, intended primarily
Checkerboard_rendering
Image classification model
applied to image classification or retrieval, by treating image features as words. In document classification, a bag of words is a sparse vector of occurrence
Bag-of-words model in computer vision
Bag-of-words_model_in_computer_vision
Method by which information is represented in the brain
computers, information is massively distributed across neurons. Sparse coding of natural images produces wavelet-like oriented filters that resemble the receptive
Neural_coding
3D reconstruction technique
such data, images (rendered through traditional non-learned methods) and respective camera poses are reproducible and error-free. For each sparse viewpoint
Neural_radiance_field
Romanian scientist and emeritus professor
Donoho, D.L.; Elad, M. (2009), "From Sparse Solutions of Systems of Equations to Sparse Modeling of Signals and Images", SIAM Review, 51 (1): 34–81, Bibcode:2009SIAMR
Alfred_Marcel_Bruckstein
Image reconstruction algorithms
Reconstruction Technique iterative Sparse Asymptotic Minimum Variance Herman, G. T., Fundamentals of computerized tomography: Image reconstruction from projection
Iterative_reconstruction
Parameter-free superresolution algorithm
SAMV (iterative sparse asymptotic minimum variance) is a parameter-free superresolution algorithm for the linear inverse problem in spectral estimation
SAMV_(algorithm)
even virtual k-space data is the Fourier transform of the underlying sparse image. It is based on the principle that Ghost Nyquists are produced due to
Ghosting_(medical_imaging)
Interdisciplinary field
parameters will be imaged in silico based on the integration of observable but sometimes sparse and inconsistent multimodal images and physiological measurements
Medical_image_computing
Type of convolutional neural network
Segmentation from Sparse Annotation; TernausNet: U-Net with VGG11 Encoder Pre-Trained on ImageNet for Image Segmentation. Image-to-image translation to estimate
U-Net
Volume rendering technique
for representing and rendering photorealistic 3d scenes from a sparse set of 2D images. It enables the creation of high-quality real-time novel-view scenes
Gaussian_splatting
Shock website (1996–2012)
countries had begun to restrict internet access. Rotten.com had a sparse layout; no thumbnail images were present next to links, and the links had one-line descriptions
Rotten.com
Any technique to improve resolution of an imaging system beyond conventional limits
Super-resolution imaging (SRI) is a class of techniques to improve the resolution of an imaging system, thus achieving "super resolution" (SR). In optical
Super-resolution_imaging
Virtual hard drive format
allocate the whole image space to a file, even if parts of it are empty. This is particularly useful for file systems that do not support sparse files, such
Qcow
Tool for digital signal processing
many signal and image processing usage. (e.g., Laplacian pyramid, constructed the contourlets, sparse image representation, medical imaging, etc.). Directional
Filter_bank
Aspect of facial recognition software
enhance the detailed facial structure by using a local patch method based on sparse representation. This method was proposed by Wang and Tang and it uses an
Face_hallucination
Method of representing images in 3D
Use of a sparse depth map can help overcome auto-generation limitations. For example, if a depth finding algorithm takes cues from image brightness
Anaglyph_3D
Technique for wavelet analysis
Application to Lossless Image Compression. Rolon, J. C.; Salembier, P. (Nov 7–9, 2007). "Generalized Lifting for Sparse Image Representation and Coding"
Lifting_scheme
Computational imaging technique
Single-pixel imaging is a computational imaging technique for producing spatially-resolved images using a single detector instead of an array of detectors
Single-pixel_imaging
Mathematical model of memory
Sparse distributed memory (SDM) is a mathematical model of human long-term memory introduced by Pentti Kanerva in 1988 while he was at NASA Ames Research
Sparse_distributed_memory
Set of learning techniques in machine learning
maximization problem tends to result in non-sparse representations. Sparse RBM was proposed to enable sparse representations. The idea is to add a regularization
Feature_learning
Israeli computer scientist
is an Israeli computer scientist known for her research on sparse dictionary learning, image denoising, and the K-SVD algorithm in machine learning. She
Michal_Aharon
Late-90s graphic novel about crime
cinematic fashion, with the occasional use of silent and repeated panels and sparse dialogue to create tension. The use of photography and clippings in the
Torso_(Image_Comics)
Country in North America
densities, with the majority residing in its urban areas and large areas being sparsely populated. Its capital is Ottawa and its three largest metropolitan areas
Canada
Israeli computer scientist, a professor of Computer Science (born 1963)
fields of sparse representations and generative AI, and deployment of these ideas to algorithms and applications in signal processing, image processing
Michael_Elad
Medical imaging procedure
axial tomography scan (CAT scan), is a medical imaging technique used to obtain detailed internal images of the body. The personnel that perform CT scans
CT_scan
Linear filter used for texture analysis
between objects in an image. Furthermore, important activations can be extracted from the Gabor space in order to create a sparse object representation
Gabor_filter
acyclic graphs. Examples of uses of structured sparsity methods include face recognition, magnetic resonance image (MRI) processing, socio-linguistic analysis
Structured sparsity regularization
Structured_sparsity_regularization
Multidimensional data algorithm
Matching pursuit (MP) is a sparse approximation algorithm which finds the "best matching" projections of multidimensional data onto the span of an over-complete
Matching_pursuit
Type of feedforward neural network
applications of CNNs include: image and video recognition, recommender systems, image classification, image segmentation, medical image analysis, natural language
Convolutional_neural_network
Country in Eastern Europe and North Asia
square kilometre (22 inhabitants/mi2), Russia is one of the world's most sparsely populated countries, with the vast majority of its people concentrated
Russia
Type of spatial anti-aliasing
is poor for screen-aligned edges, but image quality is good when the number of multisamples is large. A sparse regular grid sample pattern is a subset
Multisample_anti-aliasing
Approach to texture analysis
texture of the image. Because co-occurrence matrices are typically large and sparse, various metrics of the matrix are often taken to get a more useful set
Co-occurrence_matrix
Proprietary file system developed by Microsoft
access control lists (ACLs); filesystem encryption; transparent compression; sparse files; file system journaling and volume shadow copy, a feature that allows
NTFS
Large language model developed by Google
it could process multiple types of data simultaneously, including text, images, audio, video, and computer code. It had been developed as a collaboration
Gemini_(language_model)
Combining information from two detectors
vulnerable target with sparse photons can be combined with a camera counting visible photons through the use of ghost imaging with correlated photons
Ghost_imaging
Star Wars character also known as Baby Yoda
Nevarro. In "Chapter 4: Sanctuary", the Mandalorian seeks refuge in the sparsely populated planet Sorgan. He plans to leave Grogu in a village there under
Grogu
Country in West Asia
date palms, acacia, and eucalyptus trees. In the desert, the flora is very sparse and consists of grasses and thorn bushes. The indigenous fauna had come
United_Arab_Emirates
in the field of digital signal processing, particularly in sparse representation, sparse recovery, sampling, multi-rate systems, filter banks, transforms
Trac_Tran
2013 film by Jonathan Glazer
and Campbell pared it back from an elaborate, effects-heavy concept to a sparse story focusing on an alien perspective of the human condition. Most of the
Under_the_Skin_(2013_film)
Remote sensing processing
photographic and satellite image interpretation, or just image interpretation when in context, is the act of examining photographic images, particularly airborne
Aerial photographic and satellite image interpretation
Aerial_photographic_and_satellite_image_interpretation
Producing images of 3D scenes
Rendering is the process of generating an image from input data such as 3D models. The word "rendering" (in one of its senses) originally meant the task
Rendering_(computer_graphics)
Branch of machine learning
similarly performing shallow network. For instance, it was proved that sparse multivariate polynomials are exponentially easier to approximate with DNNs
Deep_learning
U.S. territory in the Pacific Ocean
resides on Saipan, Tinian, and Rota. The other Northern Mariana islands are sparsely inhabited; the most notable among these is Pagan, which has been largely
Northern_Mariana_Islands
Process of removing noise from a signal
Egiazarian, Karen (16 July 2007). "Image denoising by sparse 3D transform-domain collaborative filtering". IEEE Transactions on Image Processing. 16 (8): 2080–2095
Noise_reduction
1908 air burst explosion in Siberia, Russia
on the morning of 30 June [O.S. 17 June] 1908. The explosion over the sparsely populated East Siberian taiga felled a large number of trees, over an area
Tunguska_event
Subset of artificial intelligence
class that is best sparsely represented by the corresponding dictionary. Sparse dictionary learning has also been applied in image denoising. The key
Machine_learning
Canadian experimental rock duo
huge-ass piñata", according to Klek. The band's music includes vocals only sparsely, and the ones that are there are distorted and difficult to understand
Angine_de_Poitrine
Compact astronomical body
the diameter size of the Earth. The EHT team used imaging algorithms to compute the most probable image from the data in its observations of Sagittarius
Black_hole
Reverse-engineering neural networks
such as AI misalignment. A sparse autoencoder (SAE) is a model trained to disentangle neural network activations into sparse representations. The learned
Mechanistic_interpretability
Israeli physicist
Eldar, Mordechai Segev & Oren Cohen (2015). "Sparsity-based super-resolved coherent diffraction imaging of one-dimensional objects". Nature Communications
Yoav_Shechtman
client LibreSSL — fork of OpenSSL for TLS Librsb — parallel library for sparse matrix computations Librsvg — SVG rendering library libsndfile — reading
List_of_C_software_and_tools
Largest city in Switzerland
station are the largest and busiest in the country. Evidence of early, sparse settlements in the area dates back more than 6,400 years, indicating human
Zurich
Theoretical model of sensory neuroscience
components in a natural image. Additionally, a "hierarchical covariance model" developed by Karklin and Lewicki expands on sparse coding methods and can
Efficient_coding_hypothesis
Neural network coding model
The convolutional sparse coding paradigm is an extension of the global sparse coding model, in which a redundant dictionary is modeled as a concatenation
Convolutional_sparse_coding
Indirectly forming images from measurements using algorithms
improve image quality and reduce radiation dose in CT. In MRI, compressed sensing has been used to accelerate image acquisition by exploiting sparsity in the
Computational_imaging
Type of data model
model (EAV) is a data model optimized for the space-efficient storage of sparse—or ad-hoc—property or data values, intended for situations where runtime
Entity–attribute–value_model
States Mutation Moderate Rex All Lykoi United States Mutation Moderate Sparse haired Black roan Maine Coon United States Natural, crossbreed Large Semi-long/long
List_of_cat_breeds
1987 studio album by Frank Morgan and George Cables
the Things You Are" and "After You've Gone") sound fresh and new in this sparse yet very complete setting". "All the Things You Are" (Jerome Kern, Oscar
Double_Image_(album)
Geographic and cultural region of the US
higher population, with 23.76 million residents as of the 2020 census. The sparsely populated desert region of California occupies a significant portion of
Southern_California
Dictionary learning algorithm
k-SVD is a dictionary learning algorithm for creating a dictionary for sparse representations, via a singular value decomposition approach. k-SVD is a
K-SVD
Most populous city in Canada
extensive bus network that serves parts of the city many not served by the sparse subway network. The TTC bus system had an annual ridership of over 389 million
Toronto
Method of data analysis
Aybat, and E. Zahzah. Handbook on Robust Low-Rank and Sparse Matrix Decomposition: Applications in Image and Video Processing, CRC Press, Taylor and Francis
Robust principal component analysis
Robust_principal_component_analysis
Province of Canada
economy depends highly on manufacturing. In contrast, Northern Ontario is sparsely populated with cold winters and heavy forestation, with mining and forestry
Ontario
History of the Korean alphabet
submitted to have Hangul be an exam subject for civil servants, but Paek argued sparse records on the topic suggest that this policy did not last long. King Seongjong
History_of_Hangul
Medical imaging technique
"SPIRAL out of Convexity: Sparsity-regularized Algorithms for Photon-limited Imaging". SPIE Electronic Imaging. Computational Imaging VIII. 7533: 75330R. Bibcode:2010SPIE
Positron_emission_tomography
Borough and county in New York, US
industrialization spread to Sunset Park (then coterminous with the city's sprawling, sparsely populated Eighth Ward) and adjacent Bay Ridge (hitherto a resort-like subsection
Brooklyn
Camera autofocus system
and then combine the full signal for image output. Unlike earlier systems that used separate AF sensors or sparse on-sensor AF pixels, Dual Pixel allows
Canon_Dual_Pixel_CMOS_AF
Country primarily in North America
government-sponsored national passenger rail company, has a relatively sparse network compared to that of Western European countries. Service is concentrated
United_States
French artificial intelligence company
capabilities. On 2 December 2025, Mistral AI released Mistral Large 3, a sparse, mixture-of-experts model with 41 billion active parameters and 675 billion
Mistral_AI
Measure of similarity and diversity between sets
The Jaccard index is particularly useful for analyzing large-scale and sparse datasets in modern data mining applications. Given two objects, A and B
Jaccard_index
Crusaders. This had a long-term effect on those areas, which remained sparsely populated for centuries. The activity in that time concentrated more inland
History_of_Israel
Country in Southern and Western Europe
Basilicata, and the island of Sardinia, as well as much of Sicily, are sparsely populated. Italy's population almost doubled during the 20th century, but
Italy
Large-screen film format
most conventional film projectors, the film runs horizontally so that the image width can be greater than the width of the film stock. It is called the
IMAX
directed graph Johnson's algorithm: all pairs shortest path algorithm in sparse weighted directed graph Transitive closure problem: find the transitive
List_of_algorithms
Country in Southeast Asia and Oceania
relies heavily on coal-fired generation. Extending the grid is difficult in sparsely populated and island areas, while reliability problems are reported even
Indonesia
Method for capturing hyperspectral images
be considered a basic snapshot hyperspectral imaging technique. Spaced point-like sources, such as a sparse field of stars, is a requirement to avoid spectrum
Snapshot hyperspectral imaging
Snapshot_hyperspectral_imaging
Supranational political and economic union
the "blue banana", while Sweden and Finland in the north are much more sparsely populated. The total population of the EU has been slightly decreasing
European_Union
German electronic music band
electronic music with pop melodies, sparse arrangements, and repetitive rhythms, while adopting a stylised image including matching suits. Following the
Kraftwerk
SPARSE IMAGE
SPARSE IMAGE
Male
English
Short form of English unisex Paisley, PAISE means "church."Â
Surname or Lastname
English
English : from the Norman personal name Serlo, Germanic Sarilo, Serilo. This was probably originally a byname cognate with Old Norse Sorli, and akin to Old English searu ‘armor’, meaning perhaps ‘defender’, ‘protector’.
Surname or Lastname
English
English : patronymic from Spark 1.
Boy/Male
Gujarati, Hindu, Indian, Kannada, Malayalam, Marathi, Telugu
Feel; Healthy; Touch
Boy/Male
Anglo Saxon Welsh
Spares.
Surname or Lastname
English
English : patronymic from Spire 1.
Surname or Lastname
Portuguese
Portuguese : occupational name from soeiro ‘swineherd’, Latin suerius.English : patronymic from a nickname for someone with reddish hair, from Anglo-Norman French sor ‘chestnut (color)’.
Boy/Male
American, British, English
Gallant
Surname or Lastname
English
English : variant spelling of Pass.French : possibly a nickname from passe ‘sparrow’.
Surname or Lastname
English
English : metonymic occupational name for someone who made bags or purses or for an official in charge of expenditure, from Middle English purse (via Old English from Latin bursa).Scottish : variant of Purser.
Female
English
English variant form of French Cerise, SHARISE means "cherry."Â
Surname or Lastname
English (Suffolk)
English (Suffolk) : unexplained.
Surname or Lastname
English
English : patronymic from Spear.
Surname or Lastname
English
English : variant of Sparks.
Surname or Lastname
English
English : nickname for a frugal person, from Middle English spare ‘sparing’, ‘frugal’.
Girl/Female
Hindu, Indian
Touch
Surname or Lastname
Irish (Kerry)
Irish (Kerry) : Anglicized form of Gaelic Mac Saoghair, which in turn may be a patronymic from a Gaelicized form of the Old English personal name Saeger (see 2 below).English : patronymic from a Middle English personal name Saher or Seir (see Sayer 1).Americanized form of French Cyr.Richard Sears came to Plymouth, MA, from England about 1630.
Surname or Lastname
English
English : variant of Spear.
Surname or Lastname
English
English : variant of Speake.
Boy/Male
Afghan, Arabic, Iranian, Muslim, Parsi
Pious; Pure; Chaste; Holy
SPARSE IMAGE
SPARSE IMAGE
Girl/Female
Arabic, Australian
Bless
Female
Norwegian
Danish and Norwegian form of English Abigail, ABIGAEL means "father rejoices."
Girl/Female
Muslim
Female minister
Girl/Female
Norse
Battle maiden.
Boy/Male
Tamil
Descended from heaven
Girl/Female
Muslim/Islamic
Love
Boy/Male
Arabic, Muslim, Parsi
Thrice Strong
Girl/Female
Hindu
Girl/Female
American, Anglo, Australian, British, Czechoslovakian, Danish, Dutch, English, Finnish, French, German, Greek, Hungarian, Indian, Italian, Latin, Polish, Portuguese, Russian, Slavic, Swedish, Ukrainian
Truth; Victory; One who Brings Victory; True Image; Trustworthy; Faithful; Summer; Faith
Female
Egyptian
, the sister of the officer Tutu.
SPARSE IMAGE
SPARSE IMAGE
SPARSE IMAGE
SPARSE IMAGE
SPARSE IMAGE
v. t.
Scanty; not abundant or plentiful; as, a spare diet.
v. t.
Being over and above what is necessary, or what must be used or reserved; not wanted, or not used; superfluous; as, I have no spare time.
n.
A fine sieve; a searce.
adv.
In a scattered or sparse manner.
imp. & p. p.
of Spare
n.
One who spares.
v. t.
To inclose in a hearse; to entomb.
superl.
Thinly scattered; set or planted here and there; not being dense or close together; as, a sparse population.
n.
The right of bowling again at a full set of pins, after having knocked all the pins down in less than three bowls. If all the pins are knocked down in one bowl it is a double spare; in two bowls, a single spare.
v. t.
Held in reserve, to be used in an emergency; as, a spare anchor; a spare bed or room.
n.
One who parses.
v. t.
To sift through a sarse.
v. t.
To emit in the form or likeness of sparks.
v. t.
To sprinkle; to moisten by sprinkling; as, to sparge paper.
n.
To emit sparks; to throw off ignited or incandescent particles; to shine as if throwing off sparks; to emit flashes of light; to scintillate; to twinkle; as, the blazing wood sparkles; the stars sparkle.
superl.
Not refined; rough; rude; unpolished; gross; indelicate; as, coarse manners; coarse language.
imp. & p. p.
of Parse
superl.
Large in bulk, or composed of large parts or particles; of inferior quality or appearance; not fine in material or close in texture; gross; thick; rough; -- opposed to fine; as, coarse sand; coarse thread; coarse cloth; coarse bread.
adv.
Sparsely; scatteredly; here and there.
n.
Brilliancy; luster; as, the sparkle of a diamond.