Search for a tool
Image Pixel Reader

Tool to read the color of a pixel in an image and extract the red, green, blue values or to extract all the pixels of the same color in an image.

Results

Image Pixel Reader -

Tag(s) : Image Processing

Share
Share
dCode and more

dCode is free and its tools are a valuable help in games, maths, geocaching, puzzles and problems to solve every day!
A suggestion ? a feedback ? a bug ? an idea ? Write to dCode!


Please, check our dCode Discord community for help requests!
NB: for encrypted messages, test our automatic cipher identifier!


Thanks to your feedback and relevant comments, dCode has developed the best 'Image Pixel Reader' tool, so feel free to write! Thank you!

Image Pixel Reader

Pixel Reader

  [X]



See also: Image Histogram

Pixel Extractor

  [X]

See also: Image Histogram

Answers to Questions (FAQ)

How to read a pixel in an image file?

The image must be in a readable format (JPG, PNG, GIF are the most common) and have a non-vector format in order to extract information on their width (number of columns) and height (number of lines).

The pixel reading is usually a number, it can be associated with a table of contents (if the colors are indexed) or with an N-bit value (usually 24 bits).

This number can then be translated into 3 components: Red, Green and Blue.

Example: The number 16711680 (which is written ff0000 in hexadecimal) corresponds to the color red, it has two components: 255 (FF) Red, 0 (00) Green and 0 00 Blue.

How to extract pixels from an image?

Read each pixel, one by one, by row or by column and note the position of the pixels corresponding to a criterion.

To extract all the pixels having a given color, read all the values of each pixel and note their coordinates (rows, columns).

How to read a transparent color?

Colors can integrate an alpha channel (called transparency channel), and although the color is totally invisible (transparent) it can contain a color.

Source code

dCode retains ownership of the online 'Image Pixel Reader' tool source code. Except explicit open source licence (indicated CC / Creative Commons / free), any 'Image Pixel Reader' algorithm, applet or snippet (converter, solver, encryption / decryption, encoding / decoding, ciphering / deciphering, translator), or any 'Image Pixel Reader' function (calculate, convert, solve, decrypt / encrypt, decipher / cipher, decode / encode, translate) written in any informatic language (Python, Java, PHP, C#, Javascript, Matlab, etc.) and no data download, script, copy-paste, or API access for 'Image Pixel Reader' will be for free, same for offline use on PC, tablet, iPhone or Android ! dCode is free and online.

Need Help ?

Please, check our dCode Discord community for help requests!
NB: for encrypted messages, test our automatic cipher identifier!

Questions / Comments

Thanks to your feedback and relevant comments, dCode has developed the best 'Image Pixel Reader' tool, so feel free to write! Thank you!


Source : https://www.dcode.fr/image-pixel-reader
© 2021 dCode — The ultimate 'toolkit' to solve every games / riddles / geocaching / CTF.
Feedback