RectLabel vs. PhotoViewerPro

An offline image annotation tool is designed to support both object detection and segmentation tasks effectively. Users can create various shapes such as polygons, cubic bezier curves, line segments, and points for accurate labeling of images. It also enables the drawing of oriented bounding boxes, particularly useful for aerial imagery analysis. Additionally, the tool allows users to label key points that can be interconnected by skeletons and offers the capability to paint pixels using brushes or superpixels. It ensures compatibility with different machine learning formats by supporting both PASCAL VOC XML and YOLO text reading and writing. Furthermore, users have the option to export their annotated data to CreateML for object detection and image classification tasks, as well as to COCO, Labelme, YOLO, DOTA, and CSV formats. The tool accommodates diverse project requirements by enabling the export of indexed color mask images and grayscale mask images. Users can easily modify settings related to objects, attributes, hotkeys, and fast labeling features to enhance their workflow efficiency. A customizable label dialog allows for smooth integration with attributes, and one-click buttons streamline the selection of object names. With an impressive auto-suggest feature that considers over 5000 object names, users can search for objects, attributes, and image names conveniently in a gallery view. Automatic labeling is facilitated through Core ML models, and the tool includes OCR technology for automatic text recognition. It also offers features to convert videos into image frames and execute image augmentation tasks. Language support covers English, Chinese, Korean, and 11 additional languages, thus catering to a wide-ranging user base and boosting productivity across various regions.

Discover a comprehensive full-screen viewer that boasts impressive photo zoom capabilities and a customizable image magnifier. This tool is equipped with a variety of powerful image editing features that enable users to resize, resample, rotate, flip, crop, sharpen, blur, and modify lighting, color, curves, and levels settings. You can choose from eleven unique resampling algorithms for adjusting image sizes. Moreover, it includes numerous color effects, allowing users to alter images with grayscale, sepia, and negative filters, as well as fine-tune the red, green, and blue balances. Creative options are expanded with special effects such as annotations, drop shadows, framing, bump mapping, sketching, oil painting, and lens effects. Users also have the flexibility to draw texts, lines, highlights, rectangles, ovals, and callout shapes directly onto their images. An array of advanced tools like the clone stamp and healing brush facilitate smooth editing, while the efficient red-eye removal feature ensures a natural look. The inclusion of multi-level undo and redo capabilities makes it straightforward to reverse edits. Additionally, the software provides one-touch display options for best fit and actual size views, along with extensive image management features that include tagging and drag-and-drop folder operations. A histogram display paired with a color counter supports precise color analysis, and users can compare multiple images side-by-side—up to four simultaneously—to effectively sift through less appealing options. Furthermore, image EXIF metadata is supported, giving users valuable insights into captured details. Altogether, these features culminate in a highly engaging and versatile photo editing experience, making it suitable for both amateurs and professionals alike.