RECENT POSTS
- Introduction to FreeBSD Security Best Practices
- Working with Package Management in FreeBSD
- Understanding FreeBSD Security Advisories and Updates
- Troubleshooting Common System Administration Issues in FreeBSD
- Tips for Hardening FreeBSD to achieve System Protection
- Setting Up DHCP Server in FreeBSD
- Secure User and Group Management in FreeBSD Systems
- Secure Remote Access with SSH in FreeBSD
- Optimizing System Performance in FreeBSD
- Network Packet Capture with tcpdump in FreeBSD
- All posts ...
Do you have GDPR compliance issues ?
Check out Legiscope a GDPR compliance software, that will save you weeks of work, automating your documentation, the training of your teams and all processes you need to keep your organisation compliant with privacy regulations
Pngcheck
Jul 20, 2023
Checks the integrity of PNG images
pngcheck verifies the integrity of PNG, JNG and MNG files by checking the internal 32-bit CRCs [checksums] and decompressing the image data; it can optionally dump almost all of the chunk-level information in the image in human-readable form. For example, it can be used to print the basic statistics about an image dimensions, bit depth, etc.; to list the color and transparency info in its palette assuming it has one; or to extract the embedded text annotations. This is a command-line program with batch capabilities.
pngsplit - break a PNG, MNG or JNG image into constituent chunks numbered for easy reassembly
png-fix-IDAT-windowsize - fix minor zlib-header breakage caused by older libpng
Checkout these related ports:
- Zphoto - Zooming photo album generator
- Zint - Barcode generator (library and utilities)
- Zimg - Image-generator that uses ASCII input files to create PNGs/EDFs
- Zgv - Graphics viewer for SVGAlib
- Zbar - ZBar barcode reader
- Zathura - Customizable lightweight pdf viewer
- Zathura-ps - PostScript support for Zathura PDF viewer
- Zathura-pdf-poppler - Poppler render PDF plugin for Zathura PDF viewer
- Zathura-pdf-mupdf - MuPDF render PDF plugin for Zathura PDF viewer
- Zathura-djvu - DjVu support for zathura
- Zathura-cb - Comic book plugin for Zathura PDF viewer
- Yukon - Real-time capture tool for OpenGL applications
- Yed - Editor for graphs and diagrams
- Yafaray - Montecarlo raytracing engine
- Yacreader - Yet another comic reader