Photography
Photos gallery and color theory.
A selection of photographs showing random moments, color play, and geometric studies. Click to open in full lightbox viewer.
About Giovanni Di Grezia
I hold a degree in Computer Science and Computer Graphics. I view photography not only as an art form but also as a fascinating study of physics and mathematics. The behavior of light through glass, the chemistry and electronics of capturing photons, and the calculations behind digital representation are pure science.
Photography is the fundamental foundation for core disciplines in graphic design, composition, lighting, and VFX (Visual Effects). In the digital age, photography is deeply intertwined with computer systems and hardware—from camera sensors and image signal processing to digital color spaces and color-grading math. There is always an overlapping zone where technology and creativity merge.
Here, I showcase some of my sample shots, captured randomly or when I'm feeling in focus.
The Photographic Tradeoff
Every image is an equation of interconnected physical tradeoffs. Sensor size, focal length, aperture, shutter speed, and ISO are all mathematically linked. Adjusting one setting changes the balance, requiring adjustments elsewhere to compensate:
Focal Length & Sensor
Controls the field of view (FOV) and spatial compression. A larger sensor gathers more light and produces a shallower depth of field, while the focal length determines magnification and depth of perspective.
Aperture & Bokeh
Regulates light volume and depth of field. A lower aperture f-number (the ratio with focal length) widens the lens opening, increasing bokeh and isolating the subject by reducing objects in focus.
Shutter Speed
Governs exposure time and motion rendering. Fast shutter speeds freeze high-speed movement but limit light ingress, whereas slow shutter speeds gather more light at the cost of potential motion blur.
ISO Sensitivity
Amplifies the sensor signal. Increasing ISO allows shooting in dark environments or using faster shutter speeds to prevent motion blur, but introduces electronic noise and grain.
It's always a tradeoff: In daylight, low ISO ensures noise control, but wide apertures might overexpose the sensor, requiring fast shutter speeds. Choosing the right focal length for field of view, aperture for bokeh, and shutter speed for exposure duration is vital to direct focus.
Everything is connected.
The Physics, Math & Technology of Photography
Light & Optics Physics
Optics is the physics of light. Understanding focal lengths, aperture refraction, circle of confusion, and lens distortion profile allows photographers to bend light creatively, while VFX artists model the exact same mathematical properties to integrate CGI elements seamlessly.
Color Theory & Matrix Math
In digital photography, colors are mathematical coordinates. Translating RAW sensor values into RGB, Rec. 709, or CIE L*a*b* colorspaces involves complex 3x3 matrix transforms, gamma encoding, and lookup tables (LUTs) to model human perception and artistic color grading.
The Overlapping Zone
Digital cameras are specialized hardware computers. From the sensor's Bayer filter demosaicing algorithms to storage write latency and digital signal processors (DSPs), high-performance digital photography is a constant convergence of hardware capabilities and artistic vision.
Let's Discuss Creative Projects
Interested in custom color grading workflows, lighting design, VFX integration pipelines, or digital image mathematics? Let's discuss how color science and technology can elevate your next project.
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