This is for what concerns the quantitative performances. Helicon Focus turns out to be monstrously fast in providing the final output: there is no possibility of comparison between the two platforms. It is impressive to observe the difference in calculation times between the two programs. TIF (16bit) Butterfly scales (330 images) The time required to calculate the final stacked image can be seen below (these values can vary in function of the processor and the graphic card installed on your computer): Since 16-bit TIFF format files retain the image metadata and have more bits per pixel than those captured by the majority of today’s cameras, this process preserves all the image quality inherent in the RAW format. ZS does not provide RAW converters, then third-party software must be downloaded separately from the net, or acquire specific software for image processing and conversion like, for example, Adobe Lightroom or CaptureOne, or use the software provided by the camera manufacturer. To compare the performances and the results of both software, the RAW files are converted to. The calculation to obtain the final image, using all 330 frames took 15′ 21.07″. It is important, therefore, to consider having the necessary space to save the temporary files created on your hard disk. DNG format while keeping intact the colorimetric profile present in the initial RAW. This program allows you to read the native RAW formats of the main photographic cameras, convert them temporarily to. The stacked image is not modified, not filtered to improve the contrast, the sharpening, and no noise removal filter was applied.įor each calculation, the time required to obtain the stacked image was determined.įor the butterfly scales dataset, a first image test was calculated using HF by importing the ARW format directly into the software. ARW format in SONY camera) at 16bit, converted to. The photos are captured in RAW mode (standard. Gives good results in complex cases (intersecting objects, deep stacks), though increases contrast and glare. Method C uses pyramid approach to image processing dividing image signals into high and low frequencies. As a parameter selected in the Preferences menu, I leave the “Grit suppression” option selected by default, it makes a small sacrifice in saving fine detail, in exchange for the benefit of getting significantly less noise in the final image. But PMax tends to increase noise and contrast, it can alter colors somewhat, and it’s liable to produce fuzzy “inversion halos” around strongly contrasting objects. It’s also very good at handling overlapping structures like mats of hair and crisscrossing bristles, nicely avoiding the loss-of-detail halos typical of other stacking programs. It is very good at finding and preserving detail even in low contrast or slightly blurred areas. The algorithm used to compile the final images is based on PMax (in Zerene) and Method C (in Helicon), algorithms that are quite similar: The series of images have been processed in the programs Zerene Stacker (ZS), ( Personal Edition, version 1.04) and Helicon Focus (HF), Pro, version 8.0.1 in BETA release). Helicon Focus platform Zerene Stacker platform The computer used to perform the calculations is a Laptop ThinkPad Intel® Core ™ i7-8850H CPU 2.60Ghz with 32Gb of RAM and Windows 10 Pro 64bit. I used the SONY A7 RII camera, 200mm tube-lens with Raynox150, and Ultra RAIL mini v2. Pseudobrookite mineral: the stack consists of 286 images, with an acquisition step between one frame and the next set to 10µm the lighting used is based on continuous LED light, using the illuminator OGGLAB DB120EB and exposure time set to 1/60 “.īee: the stack consists of 259 images, with an acquisition step between one frame and the next set to 20µm, the lighting used is also based on the use of OGGLAB DB120EB illuminator and exposure time set to 1/60 “. Some frames show a kind of shaking, this is due to the unfortunate situation when someone walks around or a car/camion cross the neighbor road □ Final result after the stacking process and image output. The software select the most in-focus images and merge the selected area with the one that are present in the next image… This animation was created using every single photo (330 images).
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |