What are the advantages and disadvantages of digital cameras compared with traditional film cameras?

1. Different media are used to store images.

Traditional photography is to record image information on photosensitive materials by chemical methods. Once exposed, the effect is basically determined and cannot be changed. Digital photography is to digitally store image information on magnetic media records, without photosensitive materials, and you can watch the effect after shooting. If you are satisfied, you can save it, if you are not satisfied, you can delete it and shoot it again.

2. The input and output modes are different.

In order to obtain images by traditional photographic methods, chemical treatment needs to be carried out in a darkroom after washing and printing. Digital photography does not require chemical treatment of photosensitive materials in a darkroom, but can be directly input into a computer for image processing, and the image can be printed with a printer after it is satisfactory.

3. The difficulty of image processing is different.

The traditional photography method must process the image in a darkroom, which has high technical requirements for the processing personnel, is difficult to process, and sometimes leaves operation marks on the image. Digital photography is processed on the computer, with simple operation and good processing effect, and no trace of processing can be seen.

Digital photography brings a lot of convenience to photography. In the preparation of photography, digital photography is simpler than traditional photography. Digital photography only needs to prepare digital cameras, memory cards, flashlights, batteries, chargers and so on. For example, a large-capacity memory card can hold dozens of films and can be reused, which solves the problem of using a large number of films. However, traditional photographic cameras, films, flashlights, tripods, cables, color filters and other objects are essential, and the preparation work is cumbersome and the amount of items carried is large, which is more troublesome in actual photographic operation. The disadvantage is that the digital camera consumes a lot of power and the battery is not universal. Once there is no motivation, you can't work. Therefore, it is necessary to bring enough batteries as needed, while the traditional camera consumes less power and the batteries are universal, which reduces the worries in this respect. However, everything is dialectical, with advantages and limitations. This paper discusses the comparison between digital photography and traditional photography.

1 Performance comparison between digital camera and traditional camera

Comparison of imaging quality of 1. 1

The main difference between digital camera and traditional camera lies in the imaging mode. Digital imaging passes through CCD image sensor, and the image consists of binary digits. CCD is a semiconductor device, and the number of units in it determines the imaging quality of digital cameras, that is, pixels. The more cells, the higher the pixel value and the better the imaging quality. Usually, the pixel level represents the grade and technical index of a digital camera. With the continuous upgrading of CCD, the pixels of digital cameras are generally around 2 million to1200,000. Traditional cameras use silver halide film to shoot, and the image quality is based on the resolution per inch. Generally, the film with sensitivity of 100 is equivalent to the image of a digital camera with more than 20 million pixels. On the other hand, when shooting a scene with silver halide film, its color and tone width are larger than CCD elements, and CCD elements will lose some details in brighter or darker light. Therefore, when shooting with a camera, the photos taken by a digital camera are incomparable in terms of imaging quality, texture and color saturation. Therefore, some professional photographers mainly use digital cameras as "drafts" when shooting with them. First, they record what they shoot, and then check the composition, light consumption and color of the picture through the LCD screen on the back of the digital camera. If the shot image is not ideal, adjust it appropriately to get the best picture quality. After all the procedures are adjusted, use a traditional camera to shoot the shooting content. Therefore, digital cameras play an auxiliary role in some professional photography, and it is impossible to replace traditional cameras.

Comparison of 1.2 picture storage methods

The storage capacity of digital cameras is relatively large. When digital photos are collected, they are converted into JPG or TIF format and stored in mobile hard disk, CD burning, digital companion and other carriers. In this form, the film can be saved independently of any carrier, and the storage mode is superior to that of digital pictures. This advantage is mainly reflected in the differences in security and modifiability. There are security problems in digital photos. Some equipment failures or computer viruses will affect the security of photos, and images cannot be reproduced because of these failures. However, after the film is developed, it is presented in the form of negatives and photos, which are generally not easy to be damaged or lost, and the security is higher than that of digital photos. Digital photos are easy to modify. Computers can easily modify photos taken by digital cameras. On the one hand, it can be grafted by software such as photo studio and processed and synthesized in various ways. This simple modification has caused serious problems to the authenticity of the image. Often, this change makes it impossible to determine the real existence of the image and judge the photographer's real shooting level. On the other hand, changing pictures by computer will also change the imaging quality of pictures to some extent and affect the reuse of pictures.

1.3 lens focal length comparison

The focal length of the lens indicated by a digital camera is different from the traditional 135 camera, and the digital camera uses a photoelectric sensing element CCD instead of film. The imaging area of 135 camera is equal to the photosensitive area of film (36×24mm), while the imaging area of digital camera varies with the size of CCD sensor used in the camera. For traditional cameras with the same lens focal length, most digital cameras have small imaging area and narrow lens viewing angle. For example, a 50mm standard lens is installed on a digital SLR camera, and its actual focal length is generally 70mm- 80mm, so the use of some lenses has changed. A wide-angle lens mounted on a digital SLR camera becomes a small wide-angle lens. If you need a wide-angle lens when shooting a unique perspective, you must install a super wide-angle lens in front of the digital SLR camera. Once the content needs to be represented by a super wide-angle lens, digital cameras cannot meet the needs of photographers.

2 Advantages of digital photography

2. 1 fast and efficient

Digital camera can quickly get the final successful image. After the digital camera presses the shutter, the LCD screen can display the captured image. After the photographer plays back the observation, he can immediately choose to store, delete or transmit according to the image quality and the size of the memory card. In contrast, the traditional camera can only get the final image after film processing, film selection and photo processing, and the photographer can only know whether he has completed the shooting task after seeing the developed film or photo. Nowadays, professional digital cameras can support Bluetooth wireless technology to transmit images. We can directly input them into the computer for digital processing or wired or wireless transmission, which is time-saving and convenient to make.

2.2 Excellent images

Digital camera images are directly input into the computer, which has higher image quality than traditional images (negative and positive) and reduces the intermediate image loss.

2.3 Easy adjustment

Compared with traditional cameras, the adjustment of sensitivity and white balance of digital cameras is very convenient. The sensitivity range of digital camera is wide, and its photoelectric sensors (CCD, SCCD, CMOS) also have their own floating range to receive light, which can be converted into the sensitivity value of traditional film, that is, the sensitivity can be changed at any time to adapt to different fields of view when shooting. The white balance of digital camera can be adjusted to a variety of different color temperature environments, which is greatly convenient for photographers compared with traditional sunlight film, lighting film and different color temperature conversion filters.

2.4 Low cost

The acquisition of digital images is replaced by memory cards. Traditional cameras can take 36 images with a roll of film, while a small memory card can store hundreds of digital images, from silver salt images to digital images. Changes in storage media and storage methods have greatly increased the storage capacity of images. The application of computer software replaces the development of medicine, computer monitors replace the development of photos, reusable digital products replace disposable photosensitive materials and drugs, and digital images are directly used for typesetting and printing after computer processing, thus minimizing the cost of photography.

2.5 Safe and reliable

It is very easy to store and search digital image data shot by digital cameras. It can be stored on CD-ROM or computer hard disk, which not only takes up less space, but also takes much longer than storing films and photos, and the quality of digital images will not change because of long storage time.

Three Disadvantages of Digital Photography

The continuous popularization and development of digital photography and digital image processing software technology not only brings great convenience to the development of photography, but also brings negative effects to the development of photography.

(1) From the current situation of photography, too much emphasis on digital processing technology or too much dependence on image processing software leads to the retrogression of the artistry and ideology of photography itself, resulting in falsehood and shallowness.

(2) If you shoot too much, you may not shoot well. After picking up a digital camera and letting go of the financial burden of film and development costs, snapping wildly has become people's hobby, but "I would rather not shoot in January than think about it all day", and the superior conditions have created people's lazy thinking.

(3) The progress of digital image processing technology also provides a more convenient and quick tool for some criminals to make fake photos, which leads to the loss of information morality.

(4) There is still a certain gap between digital camera and traditional film camera in enlarging larger images. In some extreme circumstances, digital cameras may stop working, and the price of digital cameras is still high.

4 the development of digital photography

In this field of photography, digital photography and traditional photography will compete for some time, but we all feel that digital photography is gradually crowding out and replacing the camp of traditional photography, just like color photography and black-and-white photography now. In the future, the proportion of traditional photography will gradually weaken, and the number of silver salt photos will gradually decrease, but it cannot be completely replaced. Its technical essence will be preserved, and people will always remember and enjoy digital photography. Although technology has brought great convenience, we must clearly realize that the human factor is always the first. The high quality of professional image depends not only on technology, but also on humanities, concepts, thinking and comprehensive scientific knowledge. So there is no need to blindly pursue the level of various image processing software versions, and beware of excessive computer special effects of images. With the rapid development of digital equipment and digital technology, we should not be at a loss. The cultural value of photography lies in expressing people's aesthetic interests, emotions, ideals and concepts. Therefore, in the process of promoting human civilization, it is our photographer's noblest ideal and pursuit to move and inspire people with our shocking works, which not only brings aesthetic needs and pleasure to human life, but also constantly changes people's lives and thinking, so that mankind can move towards a more civilized tomorrow.