J2K Background Remover

Remove backgrounds from any image in your browser. For free, forever.

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Image background removal refers to the process of eliminating or altering the backdrop of an image while retaining the principal or intended subject. This technique can significantly enhance the subject's prominence and users often apply it in photography, graphic design, e-commerce, and marketing.

Background removal is a potent technique used to highlight the subject of a photo more effectively. E-commerce websites frequently use this to remove unwanted or messy backgrounds from product images, making the product the sole focus of the viewer. Similarly, graphic designers use this method to isolate subjects for use in composite designs, collages, or with various other backgrounds.

There are several methods for background removal, depending on the complexity of the image and the skills and tools available to the user. Most common methods include the use of software tools like Photoshop, GIMP, or specialized background removing software. The most common techniques include use of Magic Wand tool, Quick Selection tool, or Pen tool for manual outlining. For complex images, tools such as channel masks or background eraser can be used.

Given the advancements in AI and machine learning technologies, automatic background removal has become increasingly efficient and precise. Advanced algorithms can accurately differentiate subjects from the background, even in complex images, and remove the backdrop without human intervention. This capability is not only a significant time-saver but also opens up possibilities for users without advanced skills in graphic editing software.

Image background removal is no longer a complex and time-consuming task exclusive to professionals. It is a powerful tool to direct viewer attention, create clean and professional images, and facilitate a multitude of creative possibilities. With the continuously expanding possibilities of AI, this space offers exciting potential for innovations.

What is the J2K format?

JPEG-2000 codestream

JPEG 2000, commonly referred to as J2K, is an image compression standard and coding system created by the Joint Photographic Experts Group committee in 2000 with the intention of superseding the original JPEG standard. It was developed to address some of the limitations of the original JPEG standard and to provide a new set of features that were increasingly demanded for various applications. JPEG 2000 is not just a single standard but a suite of standards, covered under the JPEG 2000 family (ISO/IEC 15444).

One of the primary advantages of JPEG 2000 over the original JPEG format is its use of wavelet transformation instead of the discrete cosine transform (DCT). Wavelet transformation allows for higher compression ratios without the same degree of visible artifacts that can be present in JPEG images. This is particularly beneficial for high-resolution and high-quality image applications, such as satellite imagery, medical imaging, digital cinema, and archival storage, where image quality is of utmost importance.

JPEG 2000 supports both lossless and lossy compression within a single compression architecture. Lossless compression is achieved by using a reversible wavelet transform, which ensures that the original image data can be perfectly reconstructed from the compressed image. Lossy compression, on the other hand, uses an irreversible wavelet transform to achieve higher compression ratios by discarding some of the less important information within the image.

Another significant feature of JPEG 2000 is its support for progressive image transmission, also known as progressive decoding. This means that the image can be decoded and displayed at lower resolutions and gradually increased to full resolution as more data becomes available. This is particularly useful for bandwidth-limited applications, such as web browsing or mobile applications, where it is beneficial to display a lower-quality version of the image quickly and improve the quality as more data is received.

JPEG 2000 also introduces the concept of regions of interest (ROI). This allows for different parts of the image to be compressed at different quality levels. For example, in a medical imaging scenario, the region containing a diagnostic feature could be compressed losslessly or at a higher quality than the surrounding areas. This selective quality control can be very important in fields where certain parts of an image are more important than others.

The file format for JPEG 2000 images is JP2, which is a standardized and extensible format that includes both the image data and metadata. The JP2 format uses the .jp2 file extension and can contain a wide range of information, including color space information, resolution levels, and intellectual property information. Additionally, JPEG 2000 supports the JPM format (for compound images, such as documents containing both text and pictures) and the MJ2 format for motion sequences, similar to a video file.

JPEG 2000 employs a sophisticated coding scheme known as the EBCOT (Embedded Block Coding with Optimal Truncation). EBCOT provides several advantages, including improved error resilience and the ability to fine-tune the compression to achieve the desired balance between image quality and file size. The EBCOT algorithm divides the image into small blocks, called code-blocks, and encodes each one independently. This allows for localized error containment in the event of data corruption and facilitates the progressive transmission of images.

The color space handling in JPEG 2000 is more flexible than in the original JPEG standard. JPEG 2000 supports a wide range of color spaces, including grayscale, RGB, YCbCr, and others, as well as various bit depths, from binary images up to 16 bits per component or higher. This flexibility makes JPEG 2000 suitable for a variety of applications and ensures that it can handle the demands of different imaging technologies.

JPEG 2000 also includes robust security features, such as the ability to include encryption and digital watermarking within the file. This is particularly important for applications where copyright protection or content authentication is a concern. The JPSEC (JPEG 2000 Security) part of the standard outlines these security features, providing a framework for secure image distribution.

One of the challenges with JPEG 2000 is that it is computationally more intensive than the original JPEG standard. The complexity of the wavelet transform and the EBCOT coding scheme means that encoding and decoding JPEG 2000 images require more processing power. This has historically limited its adoption in consumer electronics and web applications, where the computational overhead could be a significant factor. However, as processing power has increased and specialized hardware support has become more common, this limitation has become less of an issue.

Despite its advantages, JPEG 2000 has not seen widespread adoption compared to the original JPEG format. This is partly due to the ubiquity of the JPEG format and the vast ecosystem of software and hardware that supports it. Additionally, the licensing and patent issues surrounding JPEG 2000 have also hindered its adoption. Some of the technologies used in JPEG 2000 were patented, and the need to manage licenses for these patents made it less attractive for some developers and businesses.

In terms of file size, JPEG 2000 files are typically smaller than equivalent-quality JPEG files. This is due to the more efficient compression algorithms used in JPEG 2000, which can more effectively reduce redundancy and irrelevance in the image data. However, the difference in file size can vary depending on the content of the image and the settings used for compression. For images with a lot of fine detail or high noise levels, JPEG 2000's superior compression may result in significantly smaller files.

JPEG 2000 also supports tiling, which divides the image into smaller, independently encoded tiles. This can be useful for very large images, such as those used in satellite imaging or mapping applications, as it allows for more efficient encoding, decoding, and handling of the image. Users can access and decode individual tiles without needing to process the entire image, which can save on memory and processing requirements.

The standardization of JPEG 2000 also includes provisions for metadata handling, which is an important aspect for archival and retrieval systems. The JPX format, an extension of JP2, allows for the inclusion of extensive metadata, including XML and UUID boxes, which can store any type of metadata information. This makes JPEG 2000 a good choice for applications where the preservation of metadata is important, such as digital libraries and museums.

In conclusion, JPEG 2000 is a sophisticated image compression standard that offers numerous advantages over the original JPEG format, including higher compression ratios, progressive decoding, regions of interest, and robust security features. Its flexibility in terms of color spaces and bit depths, as well as its support for metadata, make it suitable for a wide range of professional applications. However, its computational complexity and the initial patent issues have limited its widespread adoption. Despite this, JPEG 2000 continues to be the format of choice in industries where image quality and feature set are more critical than computational efficiency or broad compatibility.

Supported formats

AAI.aai

AAI Dune image

AI.ai

Adobe Illustrator CS2

AVIF.avif

AV1 Image File Format

AVS.avs

AVS X image

BAYER.bayer

Raw Bayer Image

BMP.bmp

Microsoft Windows bitmap image

CIN.cin

Cineon Image File

CLIP.clip

Image Clip Mask

CMYK.cmyk

Raw cyan, magenta, yellow, and black samples

CMYKA.cmyka

Raw cyan, magenta, yellow, black, and alpha samples

CUR.cur

Microsoft icon

DCX.dcx

ZSoft IBM PC multi-page Paintbrush

DDS.dds

Microsoft DirectDraw Surface

DPX.dpx

SMTPE 268M-2003 (DPX 2.0) image

DXT1.dxt1

Microsoft DirectDraw Surface

EPDF.epdf

Encapsulated Portable Document Format

EPI.epi

Adobe Encapsulated PostScript Interchange format

EPS.eps

Adobe Encapsulated PostScript

EPSF.epsf

Adobe Encapsulated PostScript

EPSI.epsi

Adobe Encapsulated PostScript Interchange format

EPT.ept

Encapsulated PostScript with TIFF preview

EPT2.ept2

Encapsulated PostScript Level II with TIFF preview

EXR.exr

High dynamic-range (HDR) image

FARBFELD.ff

Farbfeld

FF.ff

Farbfeld

FITS.fits

Flexible Image Transport System

GIF.gif

CompuServe graphics interchange format

GIF87.gif87

CompuServe graphics interchange format (version 87a)

GROUP4.group4

Raw CCITT Group4

HDR.hdr

High Dynamic Range image

HRZ.hrz

Slow Scan TeleVision

ICO.ico

Microsoft icon

ICON.icon

Microsoft icon

IPL.ipl

IP2 Location Image

J2C.j2c

JPEG-2000 codestream

J2K.j2k

JPEG-2000 codestream

JNG.jng

JPEG Network Graphics

JP2.jp2

JPEG-2000 File Format Syntax

JPC.jpc

JPEG-2000 codestream

JPE.jpe

Joint Photographic Experts Group JFIF format

JPEG.jpeg

Joint Photographic Experts Group JFIF format

JPG.jpg

Joint Photographic Experts Group JFIF format

JPM.jpm

JPEG-2000 File Format Syntax

JPS.jps

Joint Photographic Experts Group JPS format

JPT.jpt

JPEG-2000 File Format Syntax

JXL.jxl

JPEG XL image

MAP.map

Multi-resolution Seamless Image Database (MrSID)

MAT.mat

MATLAB level 5 image format

PAL.pal

Palm pixmap

PALM.palm

Palm pixmap

PAM.pam

Common 2-dimensional bitmap format

PBM.pbm

Portable bitmap format (black and white)

PCD.pcd

Photo CD

PCDS.pcds

Photo CD

PCT.pct

Apple Macintosh QuickDraw/PICT

PCX.pcx

ZSoft IBM PC Paintbrush

PDB.pdb

Palm Database ImageViewer Format

PDF.pdf

Portable Document Format

PDFA.pdfa

Portable Document Archive Format

PFM.pfm

Portable float format

PGM.pgm

Portable graymap format (gray scale)

PGX.pgx

JPEG 2000 uncompressed format

PICON.picon

Personal Icon

PICT.pict

Apple Macintosh QuickDraw/PICT

PJPEG.pjpeg

Joint Photographic Experts Group JFIF format

PNG.png

Portable Network Graphics

PNG00.png00

PNG inheriting bit-depth, color-type from original image

PNG24.png24

Opaque or binary transparent 24-bit RGB (zlib 1.2.11)

PNG32.png32

Opaque or binary transparent 32-bit RGBA

PNG48.png48

Opaque or binary transparent 48-bit RGB

PNG64.png64

Opaque or binary transparent 64-bit RGBA

PNG8.png8

Opaque or binary transparent 8-bit indexed

PNM.pnm

Portable anymap

PPM.ppm

Portable pixmap format (color)

PS.ps

Adobe PostScript file

PSB.psb

Adobe Large Document Format

PSD.psd

Adobe Photoshop bitmap

RGB.rgb

Raw red, green, and blue samples

RGBA.rgba

Raw red, green, blue, and alpha samples

RGBO.rgbo

Raw red, green, blue, and opacity samples

SIX.six

DEC SIXEL Graphics Format

SUN.sun

Sun Rasterfile

SVG.svg

Scalable Vector Graphics

SVGZ.svgz

Compressed Scalable Vector Graphics

TIFF.tiff

Tagged Image File Format

VDA.vda

Truevision Targa image

VIPS.vips

VIPS image

WBMP.wbmp

Wireless Bitmap (level 0) image

WEBP.webp

WebP Image Format

YUV.yuv

CCIR 601 4:1:1 or 4:2:2

Frequently asked questions

How does this work?

This converter runs entirely in your browser. When you select a file, it is read into memory and converted to the selected format. You can then download the converted file.

How long does it take to convert a file?

Conversions start instantly, and most files are converted in under a second. Larger files may take longer.

What happens to my files?

Your files are never uploaded to our servers. They are converted in your browser, and the converted file is then downloaded. We never see your files.

What file types can I convert?

We support converting between all image formats, including JPEG, PNG, GIF, WebP, SVG, BMP, TIFF, and more.

How much does this cost?

This converter is completely free, and will always be free. Because it runs in your browser, we don't have to pay for servers, so we don't need to charge you.

Can I convert multiple files at once?

Yes! You can convert as many files as you want at once. Just select multiple files when you add them.