Three Techniques for Rendering Generalized Depth of Field Effects
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Completing a Photography Exhibit Data Tag
Completing a Photography Exhibit Data Tag Current Data Tags are available at: https://unl.box.com/s/1ttnemphrd4szykl5t9xm1ofiezi86js Camera Make & Model: Indicate the brand and model of the camera, such as Google Pixel 2, Nikon Coolpix B500, or Canon EOS Rebel T7. Focus Type: • Fixed Focus means the photographer is not able to adjust the focal point. These cameras tend to have a large depth of field. This might include basic disposable cameras. • Auto Focus means the camera automatically adjusts the optics in the lens to bring the subject into focus. The camera typically selects what to focus on. However, the photographer may also be able to select the focal point using a touch screen for example, but the camera will automatically adjust the lens. This might include digital cameras and mobile device cameras, such as phones and tablets. • Manual Focus allows the photographer to manually adjust and control the lens’ focus by hand, usually by turning the focus ring. Camera Type: Indicate whether the camera is digital or film. (The following Questions are for Unit 2 and 3 exhibitors only.) Did you manually adjust the aperture, shutter speed, or ISO? Indicate whether you adjusted these settings to capture the photo. Note: Regardless of whether or not you adjusted these settings manually, you must still identify the images specific F Stop, Shutter Sped, ISO, and Focal Length settings. “Auto” is not an acceptable answer. Digital cameras automatically record this information for each photo captured. This information, referred to as Metadata, is attached to the image file and goes with it when the image is downloaded to a computer for example. -
Depth-Aware Blending of Smoothed Images for Bokeh Effect Generation
1 Depth-aware Blending of Smoothed Images for Bokeh Effect Generation Saikat Duttaa,∗∗ aIndian Institute of Technology Madras, Chennai, PIN-600036, India ABSTRACT Bokeh effect is used in photography to capture images where the closer objects look sharp and every- thing else stays out-of-focus. Bokeh photos are generally captured using Single Lens Reflex cameras using shallow depth-of-field. Most of the modern smartphones can take bokeh images by leveraging dual rear cameras or a good auto-focus hardware. However, for smartphones with single-rear camera without a good auto-focus hardware, we have to rely on software to generate bokeh images. This kind of system is also useful to generate bokeh effect in already captured images. In this paper, an end-to-end deep learning framework is proposed to generate high-quality bokeh effect from images. The original image and different versions of smoothed images are blended to generate Bokeh effect with the help of a monocular depth estimation network. The proposed approach is compared against a saliency detection based baseline and a number of approaches proposed in AIM 2019 Challenge on Bokeh Effect Synthesis. Extensive experiments are shown in order to understand different parts of the proposed algorithm. The network is lightweight and can process an HD image in 0.03 seconds. This approach ranked second in AIM 2019 Bokeh effect challenge-Perceptual Track. 1. Introduction tant problem in Computer Vision and has gained attention re- cently. Most of the existing approaches(Shen et al., 2016; Wad- Depth-of-field effect or Bokeh effect is often used in photog- hwa et al., 2018; Xu et al., 2018) work on human portraits by raphy to generate aesthetic pictures. -
DEPTH of FIELD CHEAT SHEET What Is Depth of Field? the Depth of Field (DOF) Is the Area of a Scene That Appears Sharp in the Image
Ms. Brown Photography One DEPTH OF FIELD CHEAT SHEET What is Depth of Field? The depth of field (DOF) is the area of a scene that appears sharp in the image. DOF refers to the zone of focus in a photograph or the distance between the closest and furthest parts of the picture that are reasonably sharp. Depth of field is determined by three main attributes: 1) The APERTURE (size of the opening) 2) The SHUTTER SPEED (time of the exposure) 3) DISTANCE from the subject being photographed 4) SHALLOW and GREAT Depth of Field Explained Shallow Depth of Field: In shallow depth of field, the main subject is emphasized by making all other elements out of focus. (Foreground or background is purposely blurry) Aperture: The larger the aperture, the shallower the depth of field. Distance: The closer you are to the subject matter, the shallower the depth of field. ***You cannot achieve shallow depth of field with excessive bright light. This means no bright sunlight pictures for shallow depth of field because you can’t open the aperture wide enough in bright light.*** SHALLOW DOF STEPS: 1. Set your camera to a small f/stop number such as f/2-f/5.6. 2. GET CLOSE to your subject (between 2-5 feet away). 3. Don’t put the subject too close to its background; the farther away the subject is from its background the better. 4. Set your camera for the correct exposure by adjusting only the shutter speed (aperture is already set). 5. Find the best composition, focus the lens of your camera and take your picture. -
Dof 4.0 – a Depth of Field Calculator
DoF 4.0 – A Depth of Field Calculator Last updated: 8-Mar-2021 Introduction When you focus a camera lens at some distance and take a photograph, the further subjects are from the focus point, the blurrier they look. Depth of field is the range of subject distances that are acceptably sharp. It varies with aperture and focal length, distance at which the lens is focused, and the circle of confusion – a measure of how much blurring is acceptable in a sharp image. The tricky part is defining what acceptable means. Sharpness is not an inherent quality as it depends heavily on the magnification at which an image is viewed. When viewed from the same distance, a smaller version of the same image will look sharper than a larger one. Similarly, an image that looks sharp as a 4x6" print may look decidedly less so at 16x20". All other things being equal, the range of in-focus distances increases with shorter lens focal lengths, smaller apertures, the farther away you focus, and the larger the circle of confusion. Conversely, longer lenses, wider apertures, closer focus, and a smaller circle of confusion make for a narrower depth of field. Sometimes focus blur is undesirable, and sometimes it’s an intentional creative choice. Either way, you need to understand depth of field to achieve predictable results. What is DoF? DoF is an advanced depth of field calculator available for both Windows and Android. What DoF Does Even if your camera has a depth of field preview button, the viewfinder image is just too small to judge critical sharpness. -
Logitech PTZ Pro Camera
THE USB 1080P PTZ CAMERA THAT BRINGS EVERY COLLABORATION TO LIFE Logitech PTZ Pro Camera The Logitech PTZ Pro Camera is a premium USB-enabled HD Set-up is a snap with plug-and-play simplicity and a single USB cable- 1080p PTZ video camera for use in conference rooms, education, to-host connection. Leading business certifications—Certified for health care and other professional video workspaces. Skype for Business, Optimized for Lync, Skype® certified, Cisco Jabber® and WebEx® compatible2—ensure an integrated experience with most The PTZ camera features a wide 90° field of view, 10x lossless full HD business-grade UC applications. zoom, ZEISS optics with autofocus, smooth mechanical 260° pan and 130° tilt, H.264 UVC 1.5 with Scalable Video Coding (SVC), remote control, far-end camera control1 plus multiple presets and camera mounting options for custom installation. Logitech PTZ Pro Camera FEATURES BENEFITS Premium HD PTZ video camera for professional Ideal for conference rooms of all sizes, training environments, large events and other professional video video collaboration applications. HD 1080p video quality at 30 frames per second Delivers brilliantly sharp image resolution, outstanding color reproduction, and exceptional optical accuracy. H.264 UVC 1.5 with Scalable Video Coding (SVC) Advanced camera technology frees up bandwidth by processing video within the PTZ camera, resulting in a smoother video stream in applications like Skype for Business. 90° field of view with mechanical 260° pan and The generously wide field of view and silky-smooth pan and tilt controls enhance collaboration by making it easy 130° tilt to see everyone in the camera’s field of view. -
Portraiture, Surveillance, and the Continuity Aesthetic of Blur
Michigan Technological University Digital Commons @ Michigan Tech Michigan Tech Publications 6-22-2021 Portraiture, Surveillance, and the Continuity Aesthetic of Blur Stefka Hristova Michigan Technological University, [email protected] Follow this and additional works at: https://digitalcommons.mtu.edu/michigantech-p Part of the Arts and Humanities Commons Recommended Citation Hristova, S. (2021). Portraiture, Surveillance, and the Continuity Aesthetic of Blur. Frames Cinema Journal, 18, 59-98. http://doi.org/10.15664/fcj.v18i1.2249 Retrieved from: https://digitalcommons.mtu.edu/michigantech-p/15062 Follow this and additional works at: https://digitalcommons.mtu.edu/michigantech-p Part of the Arts and Humanities Commons Portraiture, Surveillance, and the Continuity Aesthetic of Blur Stefka Hristova DOI:10.15664/fcj.v18i1.2249 Frames Cinema Journal ISSN 2053–8812 Issue 18 (Jun 2021) http://www.framescinemajournal.com Frames Cinema Journal, Issue 18 (June 2021) Portraiture, Surveillance, and the Continuity Aesthetic of Blur Stefka Hristova Introduction With the increasing transformation of photography away from a camera-based analogue image-making process into a computerised set of procedures, the ontology of the photographic image has been challenged. Portraits in particular have become reconfigured into what Mark B. Hansen has called “digital facial images” and Mitra Azar has subsequently reworked into “algorithmic facial images.” 1 This transition has amplified the role of portraiture as a representational device, as a node in a network -
Depth of Focus (DOF)
Erect Image Depth of Focus (DOF) unit: mm Also known as ‘depth of field’, this is the distance (measured in the An image in which the orientations of left, right, top, bottom and direction of the optical axis) between the two planes which define the moving directions are the same as those of a workpiece on the limits of acceptable image sharpness when the microscope is focused workstage. PG on an object. As the numerical aperture (NA) increases, the depth of 46 focus becomes shallower, as shown by the expression below: λ DOF = λ = 0.55µm is often used as the reference wavelength 2·(NA)2 Field number (FN), real field of view, and monitor display magnification unit: mm Example: For an M Plan Apo 100X lens (NA = 0.7) The depth of focus of this objective is The observation range of the sample surface is determined by the diameter of the eyepiece’s field stop. The value of this diameter in 0.55µm = 0.6µm 2 x 0.72 millimeters is called the field number (FN). In contrast, the real field of view is the range on the workpiece surface when actually magnified and observed with the objective lens. Bright-field Illumination and Dark-field Illumination The real field of view can be calculated with the following formula: In brightfield illumination a full cone of light is focused by the objective on the specimen surface. This is the normal mode of viewing with an (1) The range of the workpiece that can be observed with the optical microscope. With darkfield illumination, the inner area of the microscope (diameter) light cone is blocked so that the surface is only illuminated by light FN of eyepiece Real field of view = from an oblique angle. -
DMC-TZ7 Digital Camera Optics
DMC-TZ7 Digital Camera LUMIX Super Zoom Digital Camera 12x Optical Zoom 25mm Ultra Wide-angle LEICA DC Lens HD Movie Recording in AVCHD Lite with Dolby Stereo Digital Creator Advanced iA (Intelligent Auto) Mode with Face Recognition and Movie iA Mode Large 3.0-inch, 460,000-dot High-resolution Intelligent LCD with Wide-viewing Angle Venus Engine HD with HDMI Compatibility and VIERA Link Super Zoom Camera TZ7 - 12x Optical Zoom 25mm Wide-angle LEICA DC Lens with HD Movie Re- cording in AVCHD Lite and iA (Intelligent Auto) Mode Optics Camera Effective Pixels 10.1 Megapixels Sensor Size / Total Pixels / Filter 1/2.33-inch / 12.7 Total Megapixels / Primary Colour Filter Aperture F3.3 - 4.9 / Iris Diaphragm (F3.3 - 6.3 (W) / F4.9 - 6.3 (T)) Optical Zoom 12x Award 2009-03-26T11:07:00 Focal Length f=4.1-49.2mm (25-300mm in 35mm equiv.) DMC-TZ7, Photography- Extra Optical Zoom (EZ) 14.3x (4:3 / 7M), 17.1x (4:3 / 5M), 21.4x (under 3M) Blog (Online), Essential Award, March 2009 Lens LEICA DC VARIO-ELMAR 10 elements in 8 groups (2 Aspherical Lenses / 3 Aspherical surfaces, 2 ED lens) 2-Speed Zoom Yes Optical Image Stabilizer MEGA O.I.S. (Auto / Mode1 / Mode2) Digital Zoom 4x ( Max. 48.0 x combined with Optical Zoom without Extra Optical Zoom ) Award (Max.85.5x combined with Extra Optical Zoom) 2009-03-26T11:10:00 Focusing Area Normal: Wide 50cm/ Tele 200cm - infinity DMC-TZ7, CameraLabs Macro / Intelligent AUTO / Clipboard : Wide 3cm / Max 200cm / Tele (Online), Highly Recom- 100cm - infinity mended Award, March 2009 Focus Range Display Yes AF Assist Lamp Yes Focus Normal / Macro, Continuous AF (On / Off), AF Tracking (On / Off), Quick AF (On / Off) AF Metering Face / AF Tracking / Multi (11pt) / 1pt HS / 1pt / Spot Shutter Speed 8-1/2000 sec (Selectable minimum shutter speed) Starry Sky Mode : 15, 30, 60sec. -
The Evolution of Keyence Machine Vision Systems
NEW High-Speed, Multi-Camera Machine Vision System CV-X200/X100 Series POWER MEETS SIMPLICITY GLOBAL STANDARD DIGEST VERSION CV-X200/X100 Series Ver.3 THE EVOLUTION OF KEYENCE MACHINE VISION SYSTEMS KEYENCE has been an innovative leader in the machine vision field for more than 30 years. Its high-speed and high-performance machine vision systems have been continuously improved upon allowing for even greater usability and stability when solving today's most difficult applications. In 2008, the XG-7000 Series was released as a “high-performance image processing system that solves every challenge”, followed by the CV-X100 Series as an “image processing system with the ultimate usability” in 2012. And in 2013, an “inline 3D inspection image processing system” was added to our lineup. In this way, KEYENCE has continued to develop next-generation image processing systems based on our accumulated state-of-the-art technologies. KEYENCE is committed to introducing new cutting-edge products that go beyond the expectations of its customers. XV-1000 Series CV-3000 Series THE FIRST IMAGE PROCESSING SENSOR VX Series CV-2000 Series CV-5000 Series CV-500/700 Series CV-100/300 Series FIRST PHASE 1980s to 2002 SECOND PHASE 2003 to 2007 At a time when image processors were Released the CV-300 Series using a color Released the CV-2000 Series compatible with x2 Released the CV-3000 Series that can simultaneously expensive and difficult to handle, KEYENCE camera, followed by the CV-500/700 Series speed digital cameras and added first-in-class accept up to four cameras of eight different types, started development of image processors in compact image processing sensors with 2 mega-pixel CCD cameras to the lineup. -
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Using Depth Mapping to Realize Bokeh Effect with a Single Camera Android Device EE368 Project Report Authors (SCPD Students): Jie Gong, Ran Liu, Pradeep Vukkadala
Using Depth Mapping to realize Bokeh effect with a single camera Android device EE368 Project Report Authors (SCPD students): Jie Gong, Ran Liu, Pradeep Vukkadala Abstract- In this paper we seek to produce a bokeh Bokeh effect is usually achieved in high end SLR effect with a single image taken from an Android device cameras using portrait lenses that are relatively large in size by post processing. Depth mapping is the core of Bokeh and have a shallow depth of field. It is extremely difficult effect production. A depth map is an estimate of depth to achieve the same effect (physically) in smart phones at each pixel in the photo which can be used to identify which have miniaturized camera lenses and sensors. portions of the image that are far away and belong to However, the latest iPhone 7 has a portrait mode which can the background and therefore apply a digital blur to the produce Bokeh effect thanks to the dual cameras background. We present algorithms to determine the configuration. To compete with iPhone 7, Google recently defocus map from a single input image. We obtain a also announced that the latest Google Pixel Phone can take sparse defocus map by calculating the ratio of gradients photos with Bokeh effect, which would be achieved by from original image and reblured image. Then, full taking 2 photos at different depths to camera and defocus map is obtained by propagating values from combining then via software. There is a gap that neither of edges to entire image by using nearest neighbor method two biggest players can achieve Bokeh effect only using a and matting Laplacian. -
How Your Digital Camera Works
How Your Digital Camera Works By Todd Vorenkamp | Have you ever wondered what is going on inside that picture-taking box that you just held up to your eye, or out at arm’s length, to capture a photograph? The Basics The camera is, in its most simplified terms, a box that allows light to enter and strike a light- sensitive surface. This surface is either a frame of film or a digital sensor. Cameras can accomplish this task in the most simple way—a pinhole camera, for instance. Pinhole cameras may have only one moving part, or none. Or, the camera can have dozens of moving parts like the modern film or digital single-lens reflex (SLR or DSLR) camera. In this piece, we will discuss the modern cameras popular with today’s photographers. We are going to talk about cameras in general terms, so please know that I am aware of dozens of different ways in which different cameras make images. For simplicity’s sake, we will keep it simple! A Common Path Modern cameras, more or less, work similarly to produce a photograph. Obviously, some are more complex than others, but, in general, light travels a similar path once it meets the camera lens. • Aperture • Shutter • Image Plane How the image is viewed on the camera, through an optical or electronic viewfinder or electronic screen is one thing that differentiates different types of cameras. The Lens Light first enters a lens. This is an optical device made from plastic, glass, or crystal that bends the light entering the lens toward the image plane.