Free image editing software for mac

NIH Image is a public domain image processing and analysis program for the Macintosh.

Image can acquire, display, edit, enhance, analyze and animate images. It reads and writes TIFF, PICT, PICS and MacPaint files, providing compatibility with many other applications, including programs for scanning, processing, editing, publishing and analyzing images. It supports many standard image processing functions, including contrast enhancement, density profiling, smoothing, sharpening, edge detection, median filtering, and spatial convolution with user defined kernels.

Image can be used to measure area, mean, centroid, perimeter, etc. of user defined regions of interest. It also performs automated particle analysis and provides tools for measuring path lengths and angles. Spatial calibration is supported to provide real world area and length measurements. Density calibration can be done against radiation or optical density standards using user specified units. Results can be printed, exported to text files, or copied to the Clipboard.

A tool palette supports editing of color and gray scale images, including the ability to draw lines, rectangles and text. It can flip, rotate, invert and scale selections. It supports multiple windows and 8 levels of magnification. All editing, filtering, and measurement functions operate at any level of magnification and are undoable.

Image directly supports Data Translation and Scion frame grabber cards for capturing images or movie sequences using a TV camera. Acquired images can be shading corrected and frame averaged. Other frame grabbers are supported via plug-in modules.

Image can be customized in three ways: via a built-in Pascal-like macro language, via externally compiled plug-in modules and on the Pascal source code level.

Image Tricks 2.4.2 is a freeware application for editing your photos and images using Mac OS X Core Image filters that transform your photos and apply advanced visual effects. This program also contains a powerful image generator for. It uses Mac OS X Core Image filters that transform pictures to unimaginable extent. Various mathematical algorithms let you generate unique images. Created artwork can be used as a background, web-design illustration, for print materials and more.

Try the Freeware version and if you like it you can purchase a license code to activate Pro version filters and generators for just $14.95.

Major Features:

1. Easy to use and friendly Interface.
   
2. 63 Core Image Effects and Filters (72 in Pro version).
   
3. 12 image generators (19 in Pro version).
   
4. About 30 unique masks can be applied to an image.
   
5. Import over 20 image formats (TIFF, JPEG, GIF, PDF, EPS among them).
   
6. Export to TIFF, JPEG, PDF, PNG and GIF formats.
   
7. Resize and rotate images.
   
8. OpenGL acceleration supported.
   
9. iPhoto integration.
   
10. Universal Binary version allows to use it natively on both PowerPC and Intel-based
    
11. Macintosh computers.
    

Gimpshop is a Gimp modification that features menu layouts, dialogs and naming conventions similar to those found in Adobe Photoshop. Photoshop users should feel right at home using Gimpshop. The Gimp, on which Gimpshop is based, is a powerful, open source image editing application. For more info on the Gimp see this page. Gimpshop is essentially the same program with some cosmetic changes.
Enhancements:
- Universal Binary.

Requirements: Mac OS X 10.5 or later.

ToyViewer is a useful program that can read and display image files in following formats: tiff, gif, bmp, png, jpg, bie (jbig), pcx, pcd, pict, pnm (ppm, pbm, or pgm), xbm, mag, SUN Rasterfile, JPEG2000 (jp2, jpc, j2k), and other formats supported by Mac OS X.
Displayed images can be saved in following formats: tiff, pdf, gif, bmp, png, jpg, JPEG2000, bie (jbig), pnm, or xbm.
Features:ToyViewer can attach a custom icon to any file as well as newly saved image file.ToyViewer can read and write gif or png files with transparent color, and also can read and write interlaced(progressive) gif, png, or jpg files.
ToyViewer can scan (auto-display) image files in a folder.You can also display images in full-screen size.Displayed images can be scaled (enlarge/shrink).You can rotate, flip, or clip images.
Main features:
- ToyViewer can attach a custom icon to any file as well as newly saved image file.
- ToyViewer can read and write gif or png files with transparent color, and also can read and write interlaced(progressive) gif, png, or jpg files.
- ToyViewer can scan (auto-display) image files in a folder.
- You can also display images in full-screen size.
- Displayed images can be scaled (enlarge/shrink).
- You can rotate, flip, or clip images.
- ToyViewer has ability to adjust brightness, contrast, color tone of images, and has some typical operations to images, such as enhancement, embossing, and so on.
- You can replace specified color with other color or transparent color.
- Full color images can be reduced into 256, 64, or 8 colors. Also, each color value of images can be cut down to 4, 2, or 1 bit.
- ToyViewer can make images monochrome (8bit gray, 2bit gray, or bilevel). Images can be printed.
- You can set ToyViewer to display any image format if there is a filter program to ppm format.
- ToyViewer provides image conversion filter services for other applications.
- You can add comments to images (comments are written into only gif, png, jpg, or pnm formats).
- You can make Aqua-button-like images.

MicroFrontier wwwART 2.0 is an innovative and versatile image editing and paint program which is designed specifically for creating and modifying graphics for the Web. Low memory requirements and an easy-to-use interface make wwwART the ideal solution for aspiring Web artists and professionals alike.

Live Picture 2.6.2 is regarded as a simple to use, yet sophisticated image editing and compositing application, combines photographic quality with real-time performance for unparalleled productivity and creativity.

Live Picture offers a complete set of design and production tools for blazingly fast compositing, masking, retouching, and color correcting. Fully integrated with other desktop applications like Adobe Photoshop, Illustrator, and QuarkXPress, Live Picture offers a flexible editing environment that delivers the best quality images in the shortest time possible.