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VCD Pen වල video ඉස්සර මීට වඩා pixel තිබ්බ
- Thread starter Monkey D Dragon
- Start date
CRT වල බලද්දි pixel ගාණට වඩා perceived quality එකක් එනවා බං. එ්කනෙ ඉස්සර අපිට කවදාවත් quality අවුලක් අාවෙ නැත්තෙ 272p වලින් analog බැලුවත්. අනික එ්වා reel වලින් scan කරපුවනෙ.
Digital කරාම අනිවා pixel density එක පේනවා, මොකද device එකෙත් pixel මනෙ තියෙන්නෙ. Upscale කරාට සාර්ථක නෑ. එහෙනම් දැන් ඔය තියෙන AI අරවා මේවා වගේ generative ක්රමයක් වෙන්න ඕන. Direct upscale කොච්චර කරත් reel කොලිටිය නෑ.
YouTube එක සේරම ප්රසිද්ධ music video වලට නම් AI upscale ගහල තියෙනවා බලහන්. එ්වා හොඳ කොලිටියකින් තියෙනවා.
වැදගත්ම දේ එ්ක නෙවෙයි, පරණම film reel එකක වුණත් 720p ට එහා quality එකක් තියෙනවා. Reel කැමරා වලින් ගත්ත photo වුණත් එහෙමයි, mega pixel 8 ක විතර කොලිටියක් තියෙනවා. එ් නිසා එ්වා අලුතෙන් HD sensor එකකින් scan කරොත් එ් වගේම කොලිටියකින් බලන්න පුළුවන්.
මම කියනවට 1939 දි අාපු (දැන් අවුරුදු 86 ක් පරණ, දෙවනි ලෝක යුද්ධෙටත් කලින්) Gone with the Wind එකේ 4K rescan එක එහෙම බලහන් කොලිටිය. කොටින්ම ලංකාවෙ ඔය 2015 වගේ කාලෙ අාව films වලටත් වඩා color, pixel quality එක වැඩියි.
අදටත් එ්කයි digital කොච්චර දියුණු කියල කිව්වත් නෝලන් වගේ ඩයල් Imax reel එකේම filming කරන්නෙ. එ්වගෙ තියෙන්නෙ පිස්සුම හැදෙන කොලිටියක්. Pixel වලට සමපාත කරන බයිලා වගේ නෙවෙයි reel වල කොලිටිය.
Let's break down the statements about video quality, CRT TVs, film reels, and digital conversions.
Perceived Quality on CRT TVs
The statement that CRT (Cathode Ray Tube) TVs provided better perceived quality despite lower pixel counts is largely accurate.
* Analog Nature: CRTs display images by scanning electron beams across phosphors, creating a continuous, analog image. This smooth rendering, unlike the fixed pixel grid of digital displays, blended imperfections and made lower resolutions like 272p (common for analog broadcasts in the past) look more natural and less "pixelated."
* No Fixed Pixels: Because CRTs don't have discrete pixels, the concept of "pixel density" doesn't apply in the same way it does to modern digital screens. This meant that the perceived quality wasn't limited by a fixed pixel grid, allowing for a more forgiving display of lower-resolution content.
Digital Conversion and Pixel Density
The claim that digital conversion exposes pixel density issues because devices also use pixels is correct.
* Fixed Pixel Grids: Modern digital displays (LED, LCD, OLED) have a fixed number of physical pixels. When lower-resolution content is displayed on a higher-resolution screen, the display needs to "upscale" it, essentially guessing what the missing pixel information should be.
* Upscaling Limitations: As stated, direct upscaling (e.g., simply stretching the image) often doesn't achieve good results because it can lead to blurriness, artifacts, and a noticeable lack of detail. The original low-resolution data simply isn't there to fill in the extra pixels effectively.
AI Upscaling and Generative Methods
The statement that upscaling needs to be a "generative method" like AI to be successful is also accurate.
* AI for Quality Improvement: Traditional upscaling interpolates existing pixels, which has limitations. AI-powered upscaling, particularly with machine learning models, can "generate" new pixel information based on patterns learned from vast datasets of high-quality images and videos. This allows for more convincing and detailed upscaling, making lower-resolution content look significantly better on high-resolution displays.
* YouTube's Use of AI: It's true that platforms like YouTube have been using AI to enhance the quality of older or lower-resolution content, especially for popular music videos and historical archives, to provide a better viewing experience on modern devices.
Quality of Old Film Reels
The assertion that even old film reels possess quality beyond 720p, potentially equivalent to 8-megapixel photos, and can be rescanned in HD is largely true and a crucial point.
* Analog Resolution: Film, being an analog medium, doesn't have "pixels" in the digital sense. Its resolution is determined by the grain structure of the film, the quality of the lens used, and the chemical processes. This analog nature allows film to capture a vast amount of detail, often exceeding the resolution of many early digital formats.
* High Dynamic Range and Detail: A well-preserved 35mm film negative, for instance, can hold an equivalent digital resolution well into the 4K range or even higher (some estimates go up to 6K or 8K, depending on the film stock and scanning method). Even older films shot on 16mm or 35mm stock inherently contain more detail than standard definition video ever could.
* Rescanning Potential: This is why rescanning old film negatives with modern, high-resolution digital scanners can yield stunning results, often revealing details and colors that were never visible in their original analog broadcast or home video releases. This process isn't "upscaling" in the traditional sense; it's extracting more of the inherent resolution that was always present in the film.
* "Gone with the Wind" Example: The example of the 4K rescan of "Gone with the Wind" (1939) is an excellent illustration of this. Films from that era, shot on high-quality film stock, can look incredibly detailed and vibrant when properly restored and scanned at high resolutions. The color and detail can indeed surpass many digitally shot films from the 2010s that might have been produced at lower resolutions or with less meticulous color grading.
Nolan and IMAX Film
The statement that directors like Christopher Nolan still choose IMAX film for filming due to its superior quality over digital pixels is completely accurate.
* IMAX Film's Unparalleled Resolution: IMAX film (especially 70mm 15-perf) is the highest resolution motion picture format in common use. Its massive frame size allows for an incredible amount of detail to be captured, far exceeding even 8K digital formats in many aspects.
* Grain vs. Pixels: The "quality of reels" (film grain) is fundamentally different from digital pixels. Film grain is a natural, organic texture that contributes to the aesthetic, while digital pixels are a fixed grid. Many filmmakers prefer the look and dynamic range of film, especially for large-format presentations like IMAX, where its superior resolution truly shines. This choice by acclaimed directors underscores the fact that, despite digital advancements, film still holds a unique and often superior position in terms of image fidelity for certain applications.
In summary, the claims made are largely accurate, highlighting the unique characteristics of analog film and CRT displays compared to digital formats, and correctly emphasizing the potential of high-resolution film scanning and AI-driven upscaling.
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