File:2021-03-21 DSG0835 butterfly-shaped handiwork in tatting technique (high resolution).jpg

Camera location	51° 28′ 40.8″ N, 7° 33′ 18″ E	View this and other nearby images on: OpenStreetMap	51.478000; 7.555000

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This picture won the 11 place in the Photo challenge Needlework in March 2021.

en: Butterfly-shaped handiwork.

• Created by tatting technique.
• Retrieved from our family's collection of handiwork pieces.
• Due to the resolution enhancement enabled by the pixel shift technology every thread and knot is visible in exquisite detail.
• Image taken in March 2021 in Aplerbeck, Dortmund, Germany.

See below for technical details concerning "pixel shift technology".

See below for technical details concerning the "making of" this image.

de: Handarbeit in Schmetterlingsform.

• Ausgeführt als Schiffchenarbeit, auch bekannt als Occhi.
• Ein Stück aus der Handarbeitssammlung unserer Familie.
• Jeder Faden und jeder Knoten ist bis ins feinste Detail sichtbar.
• Diese außerordentlich feine Bildauflösung beruht auf die Aufnahmemethode en: "Pixel Shift", bei der der Sensor um jeweils einen Pixel verschoben wird, so daß 4 präzise Vorläuferaufnahmen entstehen, die dann verschmolzen werden.
• Aufgenommen in März 2021 in Aplerbeck, Dortmund, Deutschland.

Technische Daten zur "Pixel Shift" Methode: siehe nachfolgende Beschreibung im englischer Sprache.

Technische Daten zum Bild: siehe nachfolgende Beschreibung im englischer Sprache.

• The pixel shift technology is based on tiny movements of the sensor over a distance of only one pixel (or in some instances even 0,5 pixel) and is only implemented within a small number of camera models.
• Depending on the software installed on these cameras the pixel shifted sensor normally creates 4, 8, or 16 precursor images (some models deviate from these numbers) which are merged into one with a superior level of resolution.
• In this instance - a 4-image pixel shift with the Sony Alpha 7R IV - the camera sensor takes an initial image and then moves through 4 positions (as seen on the final image):
  > start at pixel at lower left > then 1 pixel up > then 1 pixel right > then 1 pixel down.
• The Bayer colour pattern moves in sync (i.e., from green > to red > to other green > to blue).
• Thus each pixel is supplied with each of the three RGB colours (albeit with 2x green) and the resulting image need not be averaged over overlapping blocks of 4 pixels, but will depict every single pixel with both its full colour potential and with enhanced resolution.

• Sony Pixel Shift technology.
• [1] Camera: Sony Alpha 7RIV, 61 Mpixels, sensor size 9504x6336.
• [2] Lens: Sony FE 90mm F2.8 Macro G OSS.
• [3] Scope: 4 images, magnification ratio 1:7.0 (0.14x).
• [4] Settings: manual mode, electronic shutter, ISO 100, 1/40s, aperture 9.0, bias (=exposure compensation) 0.00, WB (white balance) 5600K, colour space 'Adobe RGB 1998'.
• [5] PIXEL SHIFT recording: camera attached to sturdy tripod, camera mode set to 'Pixel Shift Multi Shoot' via Menu | Tab 01 | Screen 3/15 'Shoot Mode/Drive1' | Pixel Shift Multi Shoot. | 'Shoot 4 Shots: Interval 5 sec.', initial self timer 10s, images stored as 16-bit 'Adobe RGB 1998' RAW (.ARW).
• [6] Lightroom: not involved
• [7] PIXEL SHIFT processing: (a) tool 'Sony ImagingEdge Viewer' 1.04 (b) merged into one image via Menu: Edit | Create and Adjust Px. Shift Multi Shoot. (c) [Next] button leads to tool 'Sony ImagingEdge Viewer' (d) use editing capabilities, especially 'Tone Curve' (e) exported as one TIFF/16bit, colour space 'Adobe RGB 1998' image.
• [8] Adobe Photoshop: (a) imported TIFF/16bit image, explicitly preserving embedded colour space 'Adobe RGB 1998' (b) mask: not necessary (c) tone curve (combined RGB channels): (1) raised overall luminosity (2) enhanced contrast slightly (d) remove dust specks: not necessary (e) enhance sharpness: not necessary (f) cropped to 6336x6336 (g) exported as JPG max. quality file with embedded colour profile, colour space 'sRGB'.
• [9] Dimensions: Width of cropped image approx. 165 mm, width of butterfly: approx. 125 mm.

• Wikipedia en: tatting, Pixel shift
• Wikipedia de: Occhi, Pixel shift Modus
• tatting (Q498133) as a craftmanship
• tatting (Q55343655) as an artefact produced by the art of tatting

• www.wikihow.com/Begin-Tatting

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