nikon histogram

The gray histogram of digital image is described earlier, and the application of histogram is now tried. Histogram equalization Histogram equalization (histogram equalization) is the most typical application of histogram, which is

　　Nikon D810 Mirror Guide (classified by focal segment) 1, af-s 14-24mm f/2.8g ED Suitable for: landscape, indoor environment, etc. 2, Af-s 105mm f/2.8g VR ED Suitable for: macro, taking into account the subjects such as portrait 3, Af-s 85mm f/1.4g Apply to: Portrait and other subjects 4, Zeiss Distagon 55mm F1.4 T Application: 100% to play D810 strength 5. Af-s 24-120mm f/4g ED VR Apply: Daily hanging machine/Travel photo 6. Af-

Photography and equipment are inseparable from the body and lens. Recently, I have seen many circle friends discussing the choice of a single SLR camera, but there are very few camera sets. I am worried that new people will ignore some important things, in this way, you may regret it. As N households, I would like to give a brief introduction here. N households can select those lenses, and I hope other users can also introduce them, this allows you to evaluate each camera more objectively and co

Lens Selection Next, let's talk about the camera selection problem. This is a very troublesome problem and a big problem that is plaguing everyone's nerves. What should I consider when selecting a lens: 1. image quality; 2. Price; 3. Portability; 4. convenience. Aside from opening 1 and 2, although some old birds look down on those friends who choose to zoom in the dog mirror, it is obviously a bit funny to go out on a tour with a pair of dingjiao lenses, in terms of selection, you must also mak

Histogram equalizationHistogram equalization (histogram equalization) is the most typical application of histogram, which is a kind of image point operation . For an input image, an output image is generated by the operation, which means that the grayscale value of each pixel of the output image is determined by the input pixel point, i.e.:

-- It's hard to find a hundred changes to the demon. It's really cool !! Hood is not easy to find, the original recommended HK-7 basically belongs to the antique in the antique. Crawling for a long time, finally found a foreign introduction, said can be replaced by HK-4, better than the HK-7, and can be replaced by 85mm 1.4D-IF Hood HN-31, using a 77mm-> 72mm rotor interface is also very good, and the 77mm filter can also be used together. Then there is the use of HN-9 unscrew Hood can also be,

Some header files: #include First, create a class: Class histogram1d {PRIVATE: // number of points in the histogram int histsize [1]; // the histogram range is float hranges [2]; // pointer to this range const float * ranges [1]; // channel int channels [1]; public: // constructor histogram1d () {histsize [0] = 256; hranges [0] = 0.0; hranges [1] = 255.0; ranges [0] = hranges; channels [0] = 0 ;} In open

Let's take a closer look at the differences between Canon 7D and Nikon D300s cameras.Analysis and sharing:The 7D and Nikon D300s cameras are both quasi-professional-grade cameras and use magnesium alloy frames. Therefore, both Canon 7D and Nikon D300s have the same feel and weight. From the imaging effect, the Canon 7D and

Let's take a closer look at the comparison between Canon eos m and Nikon D7100 for photography enthusiasts.Analysis and sharing:Canon eos m in addition to the dedicated small lightweight EF-M lens, but also through the bayonet adapter EF-EOS M to transfer all EF lenses, the autofocus structure is equipped with Hybrid cmos af and touch panel for higher operability. It supports p full HD short film shooting and audio recording through a built-in ste

Give your photographers a detailed analysis to share the performance comparisons of Canon IXUS140 and Nikon D7100. Analytical sharing: Canon IXUS140 has 8 times times optical zoom lens, focal length is equivalent to 35mm 28-224mm, set up intelligent automatic shooting mode, can at any time for the image to be photographed intelligent judgment and analysis, and choose a relatively suitable way to shoot, can automatically identify 32 kinds of

To the photographic enthusiasts for detailed analysis to share the performance of Canon IXUS155 and Nikon D5200 performance comparison. Analytical sharing: Canon IXUS155 is equipped with a 20 million-pixel 1/2.3-inch CCD sensor, the first camera to reach 20 million pixels in a Canon card machine. The Nikon D5200 uses a 3-inch wide viewing angle of about 921,000 pixels of the large TFT LCD scre

To the photographic enthusiasts for detailed analysis to share the Canon 7D2 and Nikon D7100 performance comparison. Analytical sharing: Canon 7D2 's full pixel dual-core AF system is equipped with an STM-Giomada 18-135mm set of camera lenses, focusing very smoothly, focusing the process quickly and smooth transition. In video, Canon 7D2 supports 1080 30p all-i video with ultra-high-rate features that provide extremely hig

Give your photography enthusiasts a detailed analysis of the performance comparisons between Canon 5Ds and Nikon D5200. Contrast Analysis: Canon 5DS is a support for the cutting of the full format SLR, using a 3.2-inch 1.04 million-pixel LCD screen, support 1.3x, 1.6x magnification of the cutting mode, this is the first canon to support the cut shot of the full format camera. The Nikon D5200 u

Give the photographer a detailed analysis to share Canon G15 performance and Nikon P7700 performance comparison. Analytical sharing: Canon G15 is equipped with an equivalent 28-140mm 5 times optical zoom lens, aperture to f1.8-2.8, can shoot a very shallow depth of the macro work, support 1080p (1920x1080 24fps) and 720p (1280x720 30fps) video shooting and playback. And Nikon P7

Image processing-similar image recognition (histogram application) and image processing Histogram Algorithm Overview: First, histogram data is collected for the source image and the image to be filtered, and then the respective image histograms are normalized. Calculate the histogram data using the babacache coefficien

1 Grayscale Histogram 1.1 Concepts Gray scale histogram is a function of gray level distribution, and it is the statistic of gray level distribution in image. Grayscale histogram is the number of pixels in a digital image, according to the size of the gray value, the frequency of its occurrence. Gray-scale histogram i

Give your photographers a detailed analysis of the contrast between the Canon 7D camera and the Nikon D300s camera. Analytical sharing: Canon 7 D and Nikon d300s these two cameras are all professional-grade cameras, using a magnesium alloy frame. So in the handle and weight above, Canon 7 D and Nikon d300s these two cameras are the same. From the imaging e

For the camera to know more about the friends should be aware that Nikon is a more well-known camera brand, its camera by the majority of users love. In order to buy a Nikon camera, I spent 3 months working on the weekend to make money, finally saved enough money to buy my favorite Nikon camera, and every time I go out I will take my

Give the photographer a detailed analysis of the performance of the Canon 600D camera and the performance comparison of the Nikon D5100 camera. Analytical sharing: Canon 600D and Nikon D5100 these two cameras are similar in performance, and are entry-level SLR cameras. On the feel above, Nikon D5100 better, in imaging above, Canon 600D camera compared to meat.

First, histogram equalizationHistogram equalization is an important application of gray-scale transformation, it is widely used in image enhancement processing, it is based on the cumulative distribution function transformation of the histogram correction method, can produce a gray scale distribution with uniform probability density of the image, expand the value dynamic range of the pixel. The gray value o