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closing of counters. Bit0, counter enabling 0: No 1: Enable Tim2_cr1 = bit0; // enable counter Test the output level of the pd4 pin through the logical analyzer, as shown in the following figure. The source code is as follows, //************************************** ***** 1 # define bit0 0x01 2 # define bit1 0x02 3 # define bit2 0x04 4 # define bit3 0x08 5 # define bit4 0x10 6 # define bit5 0x20 7 # define bit6 0x40 8 # define bit7 0x80 9 10 void timer2_init (void) 11 {12 clk_ickr |

Reprinted from: http://hi.baidu.com/anymis/blog/item/ecc06ff4546bacdcf3d385ed.html Camshift algorithm:Camshift is a motion tracking algorithm called "continuously apative mean-shift. It is used to track the color information of moving objects in video images.I divide this algorithm into three parts for ease of understanding:1) Back Projection Calculation2) Mean Shift (mean shift) Algorithm3) camshift Algorithm(Note: The above translation is purely personal !)1) Back Projection:The steps for calc

Beginner STM32, feel the most egg pain is its clock system, every time see its clock tree is a bit dizzy, although read a lot of this information, even has written a lot of STM32 module code, did some small project, but always still on this piece of vague, indefinitely, So I want to write a little bit of my knowledge of it, step-by-step, until the day of full straightened out, (these things are not original, just want to help themselves understand)In STM32, there are five clock sources for

derived from YUV color space. Which, y is still brightness, and CR and CB is to do a small amount of adjustment of U and V, the CR represents Red component, CB represents blue component. 6.HSI color space: HSI color space is from the human visual system, with Hue (Hue), color saturation (saturation or chroma) and brightness (intensity or brightness) to describe the color. 7.HSV (hue hue, saturation satur

First, in the STM32, there are five clock sources for HSI,HSE,LSI,LSE,PLL. The ①HSI is a high-speed internal clock with an RC oscillator at a frequency of 8MHz. The ②HSE is a high-speed external clock that can be connected to a quartz/ceramic resonator or to an external clock source with a frequency range of 4mhz~16mhz. The ③LSI is a low-speed internal clock, an RC oscillator with a frequency of 40kHz. The

Decaptcha, uses an algorithm written with the guiding ideology to split distorted and noise-filled images into letters and numbers that can be identified by optical recognition technology OCR. "Most verification codes have not been verified before they are put into use, and there is a lack of reliability tests. "Elie Bursztein, a postdoctoral researcher from the Stanford University security lab, said:" I hope our research will give people a more care

domain is at-MHz. The actual output of the maximum clock can be improved a bit, but in order to ensure that in a variety of environments, it is best not to exceed the standard maximum value.The stm32f4xx device has two plls:The primary PLL (PLL) provides a clock signal from a HSE or HSI oscillator and has two different output clocks:The first output is used to generate a high-speed system clock (up to 168 MHz)The second output is used to generate

a solution. There are many ways to separate images. Color-based and shape-based. Now I feel that although the problem does not seem very difficult, it would be impossible to use a single image segmentation method. A few days ago, we always considered only color-based division. That is to say, the RGB color space is converted to the HSI color space and then combined with the S value. However, it is mainly divided according to the H value. In this e

STM32 clock System for a skilled microcontroller development should be more familiar, but for the novice without too many basic (such as I one months ago), see such a clock system diagram inevitably have a nod big, But when it comes to understanding the designer's purpose and then looking back at a picture like this, you'll find it's not a difficult thing to understand. STM32F103 has 5 clock sources, namely external high-speed clock (HSE), internal high-speed clock (

CamShift is a motion tracking algorithm called "Continuously Apative Mean-Shift. It is used to track the color information of moving objects in video images. I divide this algorithm into three parts for ease of understanding:1) Back Projection Calculation2) Mean Shift Algorithm3) CamShift AlgorithmHere we will mainly discuss Back Projection, and continue to discuss the next two algorithms in subsequent articles. Back ProjectionThe steps for calculating Back Projection are as follows:1. Calculate

ConstUnsignedCharRgbmax =255;#defineEqualzero (a) ((a) = = 0)voidCVTRGBTOHSI (cgfloat ir,cgfloat IG, cgfloat IB, unsignedChar* RH, unsignedChar* RS, unsignedChar*RI) { /*When a person observes a colored object, it uses hue, saturation, brightness to describe the object's color. Hsi(hue-saturation-intensity (lightness), the HSI or Hsl) color model describes the color characteristics with H, S, I three par

Reset and Clock control (RCC) resetting The system resets the clock control register to the CSR and the registers in the backup area, and all other registers are reset. (5 ways: Nrst pin, independent, window watchdog, SW reset, low power reset) power Reset, in addition to the registers in the backup area, the other registers are reset. Backup domain reset. Clock Clock source five HSI high-speed internal clock, RC oscillator HSE high-speed external

Google has recently accelerated the browsing of Android platform security pages by controlling browsers and the sites it accesses--Elie Bursztein, head of Google's Anti-Abuse research team, said in a Thursday blog post that Google has launched a faster new encryption algorithm These two cryptographic algorithms, named ChaCha20 and Poly1305, are added to the Chrome browser. "ChaCha20 and Poly1305 will appear very fast on mobile and wearable devices,

example program (Adc1_freeze) initialization as an example to explain. 1. Find Adc_config void Adc_config (void){* Enable the HSI (16Mhz) * *Rcc_hsicmd (ENABLE);//clock source selection and configuration, see clock tree/* Check that HSI-oscillator is ready * *while (Rcc_getflagstatus (rcc_flag_hsirdy) = = RESET);/* Configure RV3 Input voltage * ** Enable the GPIOF Clock * *Rcc_ahbperiphclockcmd (IDD_MEASUR

Tags: use indicator, mit char sys art special his opera DeclareHitoryid Number; flow_id Number; item_result_new_id Number; node_item_result_id Number; Common_diag_seqvarchar2( -); New_diag_seqvarchar2( -); K Number; Indicator_index Number; beginCommon_diag_seq:='2938564F-DDEC-4564-9E1C-FB7085B544DE'; --Historical RecordsK:=0 forIinch 1..4000000Loop K:=K+1; Historyid:=Td_diag.s_diag_history.nextval; New_diag.t_diag_history (ID, diag_sequence, diag_type, Use_scenario, Useridentity

that identifies many of the site's authentication codes at a very high rate, including Visa's website Authorize.Net, Blizzard's official website, EBay, and Wikipedia. This recognition technique uses a conceptual model in the field of robotic vision, which helps the robot to recognize the shape of an object correctly without interference from the noise of the image. Stanford's Decaptcha tool uses the above guidelines to divide distorted and noisy images into letters and numbers that can be iden

Next, this time write two topics: Color space conversion in OPENCV Geometric transformations in the OpenCV Color space conversion in OPENCVThere are many kinds of color space, commonly rgb,cmy,hsv,hsi and so on. The three-channel diagram we normally refer to is the RGB figure.posted a section of the introduction of Baidu Encyclopedia: RGB (red-green-blue) is defined by the color of the human eye recognition of th

example, select PA3 from the drop-down menu in AFR1. "step4" Download the program to stm8s. progam->all tabs. This enables the IO multiplexing configuration. 3 Test procedure/*tim2_ch3 PWMPD2 output*/#include voidClk_init (void){Clk_ickr|=0x01;//Enable internal fast clock HSICLK_CKDIVR|=0x08;//16M internal RC via 2, System clock is 8M while(! (clk_ickr0x02));//hsi ready .Clk_swr=0xe1;//

(_asm ("rim\n");), is 00; When an interrupt occurs, the current interrupt (ITC_SPRX) is loaded into i[1:0], mainly used to do the interrupt priority; Exit interrupt Auto-Clear 0 Therefore, in writing EXTI_CR1, you need to configure the ITC_SPRX to 11, or join the no interrupt command.EXTI_CR1：?? Configure the way to promote the hair;Test code#include CharKeyflag;CharKeypressstatus =1;unsigned intKeycount;/*output pin*/_boolPD2 @PD_ODR:2;_boolPC7 @PC_ODR:7;_boolPC6 @PC_ODR:6;_boolPC3 @PC_ODR:3;/

1. In stm32, there are five clock sources:HSI,HSE,LSI,LSE,PLL. ①HSIIt is a high-speed internal clock, RC oscillator, and the frequency is 8 MHz. ②HSEIt is a high-speed external clock, which can be connected to a Z/Ceramic Resonator or an external clock source. The frequency range is 4 MHz ~ 16 MHz. Generally, it is connected to 8 MHz. ③LSIIt is a low-speed internal clock, RC oscillator, and the frequency is 40 kHz. ④LSEIt is a Z crystal with a low-speed external clock and a connection frequency