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The RGB color model is a additive system in which each color was defined by the amount of red, green, and blue light Emitt Ed. In the RGB scheme, colors is represented numerically with a set of three numbers, each of which ranges from 0 to 255. White had the highest RGB value of (255, 255, 255) while Black had the lowest value of (0, 0, 0). This are consistent with the additive nature of the RGB system, since white light are the presence of all colors of light, a nd black is the absense of any l

1. Why should I introduce the HSI color model? in simple terms, the RGB model can be well adapted to the facts of the color, but not very well adapted to the color of human interpretation. When a person observes a colored object, we describe it with hue (hue), saturation (saturation) and intensity (Intensity). saturation and the larger the more vivid); Brightness : is a subjective factor, which is actually not measurable (brightness a

% Convert RGB image to HSI image % display HSI image % histogram equalization HSI image % convert HSI image back to RGB image function rgbtohsi (x) F = imread (X ); F = im2double (f); r = f (:,:, 1); G = f (:,:, 2); B = f (:,:, 3 ); th = ACOs (0.5 * (r-g) + (r-B ))). /(SQRT (r-g ). ^ 2 + (r-B ). * (G-B) + EPS); H = th;

Function HSI = rgb2hsi (X)F = X;F = im2double (f );R = f (:,:, 1 );G = f (:,:, 2 );B = f (:,:, 3 );Th = ACOs (0.5 * (r-g) + (r-B ))). /(SQRT (r-g ). ^ 2 + (r-B ). * (G-B) + EPS ));H = th;H (B> G) = 2 * pi-H (B> G );H = H/(2 * PI );S = 1-3. * (min (R, G), B)./(R + G + B + EPS );I = (R + G + B)/3;HSI = CAT (3, H, S, I );He = H * 2 * PI;He = histeq (HE );He = He/(2 * PI );Se = histeq (s );Ie = histeq (I );Choi

1. Why should I introduce the HSI color model? in simple terms, the RGB model can be well adapted to the facts of the color, but not very well adapted to the color of human interpretation. When a person observes a colored object, we describe it with hue (hue), saturation (saturation) and intensity (Intensity). saturation and the larger the more vivid); Brightness : is a subjective factor, which is actually not measurable (brightness a

Digital Image Processing Information Acquisition Struct RGB{ Unsigned char B; Unsigned char g; Unsigned char R; }; Lpsrc = (unsigned char *) pdoc-> m_pdib-> m_lpimage + Llinebytes * (lheight-1-point. Y) + point. x * 3; RGB; RGB. B = * lpsrc; RGB. G = * (lpsrc + 1 ); RGB. r = * (lpsrc + 2 ); Brightness Int gray = (INT) (0.114 * RGB. R + 0.587 * RGB. G + 0.299 * RGB. B) RGB to HSI Image Information Acquisition The encoding is as follows: R = (dou

Label: MATLAB RGB Implementation of MATLAB program for converting RGB color space to HSI color space During the implementation of the program, pay attention to the normalization of RGB pixel values, and then thousands of users should follow the formula. I have previously had Theta as a complex number, SQRT calculates the negative number and returns the result of the plural number (Bug) The program is implemented by MATLAB and makes use of the conve

value is indicated by the white. Other points in the cube space represent other colors. 16777216 colors can be represented when the value range of 3 components is an integer between 0-255. HSI uses hue (hue), saturation (saturation or chroma), and intensity (Intensity) to describe color.Hue is a property that describes a solid color, which reflects the nature of the color. The effect of saturation is to give a solid color is diluted by the degree of

I. Clock 1. Three different clock sources can be used to drive the system clock (sysclk ): . HSI oscillator clock high speed internal . HSE oscillator clock high speed external . PLL Clock Phase Locked Loop 2. These devices have two secondary clock sources: . 32 Khz low speed internal RC [1], can be used to drive independent watchdog and RTC. RTC is used to automatically wake up the system from the stopped/standby mode. . 32.768 kHz low-speed external

1. Clock source Three different clock sources can do the system clock (SYSCLK):HSI oscillator Clock: high-speed internal clockHSE oscillator Clock: high-speed external clockPLL ClockTwo x two-level clocksLSI (Low speed internal clock): 32kHz low-speed internal RC (LSI RC) Independent watchdog clock Source, RTC can be used for automatic wake-up stop/Standby mode.LSE (Low Speed external clock): 32.768kHz Low SPEED external oscillator (LSE cryst

;Tr = The tuples pointed to by PR;EndEnd The merge join algorithm allocates a pointer to each link. These pointers start to point to the first tuple of the corresponding link. As the algorithm proceeds, the pointer traverses the entire Link. In one of these relationships, all tuples with the same value on the connection property are added to the SS. As the relationships are sorted, the ordered group only needs to be read once. Disk access times: Br + BS. Hash join If one of the tuples in the rel

To view the system clock with the oscilloscope, the system clock is output to the MCO pin.After one night, I saw the waveform.First, create an empty project. Code Comment out:; Import systeminit; Delete systeminit write RCC initialization function by yourself; LDR r0, = systeminit; Blx R0The following is a setup function that uses HSI as the system clock. If the PLL is not practical, the HSI is directly out

Currently, C ++ (for example, Visual C ++) is used for digital image processing programming, because it is flexible and fast and efficient. However, it also makes development more difficult and more efficient. C # Is a new object-oriented programming language developed by Microsoft. It is derived from C/C ++ and retains the powerful functions and flexibility of C/C ++, at the same time, it has the simple syntax structure and efficient development capability of Visual Basic. For the Research on D

If there is similar, it is honored, if reproduced, please specifyThe use of custom class arrays and arrays of structures in C #Recently found many projects in a given array to implement a certain logic or processing is very troublesome, one-dimensional array, two-dimensional array,,, and so on need to go through n-multi-conversion, rather than write a custom array yourself, both convenient and save time, the following is an array of classes, in fact, the equivalent of defining an entity class, J

white in a solid color to change the color concentration, adding black to change the color depth, and adding different proportions of white, Black can obtain a variety of different shades. HSI Color SpaceThe HSI color space is based on the human visual system, using Hue (hue), color saturation (saturation or chroma) and brightness (intensity or brightness) to describe the color. The

Study Dip 70th DayReprint please indicate the source of this article:Http://blog.csdn.net/tonyshengtan , out of respect for the work of the author, reprint please indicate the source! Article code is hosted, Welcome to co-development:Https://github.com/Tony-Tan/DIPproThe opening crap.To continue the simple introduction of color image processing related knowledge, today to simply say the histogram enhancement in color image application, gray-scale image histogram enhancement has done the relevant

be added before the function. The instance function is declared as follows:__ramfunc void Lpr_ram (void)5. Wait PowerRead the first post, "MCU Low power Design (i) theory" readers will learn that the wait mode is only the CPU suspended operation, so that the crystal can be HSI (internal high speed) or LSI (internal low speed). Let's test the power consumption in his mode, set the mode: #define Mcu_mode mode_wait, set the clock: #define IS_ENABLE_LSI

In the image processing system, color space conversion is a common basic function. Although the function is not very complex, there are also some problems. After all, the first image processing work has been encountered. Here, we will first introduce the conversion between the RGB model and the HSI model of the image. In the HSI model, H: hue represents the color (purity, color) S: Saturation indicates the

in the STM32 if the external crystal is not used, osc_in and the Osc_out the method of connectionIf using an internal RC oscillator without an external crystal, proceed as follows:1) for 100 feet or 144 feet of products, osc_in should be grounded, osc_out should be suspended.2) for products with less than 100 feet, there are 2 kinds of mating methods:2.1) Osc_in and Osc_out are grounded by 10K resistors respectively. This approach can improve EMC performance.2.2) Remap osc_in and osc_out to PD0

This article from: http://www.openedv.com/posts/list/302.htmAuthor Zhang YangThe clock system is the core of the processor, so it is necessary to learn the clock system carefully before learning STM32 all the peripherals, which helps to understand the STM32 deeply.Here is a STM32 clock diagram from the Internet, which looks clearer than the one in the STM32 Chinese reference manual: Important Clocks:The relationship between PLLCLK,SYSCLK,HCKL,PCLK1,PCLK2 to be clear;1,