Introduction
You can consult the article on the history of photography.
Film Photography
- Principle of film photography: Film photography is based on the use of photosensitive films to capture images.
- Year of invention: It was invented in 1839 by Louis Daguerre and Henry Fox Talbot.
- "Developing a film photograph" operation: Developing a film photograph consists of chemically treating the film exposed to light to reveal the latent image.
Digital Photography
- Element enabling the emergence of digital photography: The digital sensor is the key element enabling the capture and conversion of images into digital data.
- Year of invention:
- The first digitization of a photograph, using a scanner, was performed in 1957 by Russell Kirsch.
- In 1975, Steve Sasson, an engineer at KODAK, made the first digital shot.
- Simplification of digital photography: Digital photography has simplified the process by allowing instant viewing of images, deletion of failed shots, and the ability to store a large number of photos.
- Most used device: Smartphones are now the most commonly used devices for taking photographs.
Digital Images
- Image definitions: These numbers represent image resolutions, expressed in number of pixels, which determine the quality and sharpness of the image. For example, 1920x1080 means 1920 pixels wide by 1080 pixels high.
- Number of pixels in a 720x480 image: In a 720x480 image, we find 720 pixels wide multiplied by 480 pixels high, for a total of 345,600 pixels.
- RGB mode: RGB mode is a color coding system based on the combination of three primary colors: Red, Green, and Blue. Each pixel is represented by a mixture of these three colors at different intensities, allowing the creation of a vast range of hues. For example, by combining 100% red, 100% green, and 100% blue, we get white. By combining 0% of all three, we get black.