set pixels(colors)
时间: 2024-03-24 09:34:39 浏览: 33
set pixels(colors)是一个用于设置像素颜色的操作它可以用于图像处理、计算机图形学等领域。通过该操作,可以将指定位置的像素点设置为指定的颜色值。
在编程中,set pixels(colors)通常需要提供以下参数:
1. 像素位置:指定要设置颜色的像素点的位置,可以是坐标、索引或其他标识方式。
2. 颜色值:指定要设置的颜色,可以使用RGB、RGBA、HSV等颜色模型表示。
具体实现set pixels(colors)的方式取决于所使用的编程语言和图像处理库。一般来说,可以通过访问图像数据结构或调用相应的图像处理函数来实现。
相关问题
# Single Color Code Tracking Example # # This example shows off single color code tracking using the CanMV Cam. # # A color code is a blob composed of two or more colors. The example below will # only track colored objects which have both the colors below in them. import sensor, image, time, math # Color Tracking Thresholds (L Min, L Max, A Min, A Max, B Min, B Max) # The below thresholds track in general red/green things. You may wish to tune them... thresholds = [(30, 100, 15, 127, 15, 127), # generic_red_thresholds -> index is 0 so code == (1 << 0) (30, 100, -64, -8, -32, 32)] # generic_green_thresholds -> index is 1 so code == (1 << 1) # Codes are or'ed together when "merge=True" for "find_blobs". sensor.reset() sensor.set_pixformat(sensor.RGB565) sensor.set_framesize(sensor.QVGA) sensor.skip_frames(time = 2000) sensor.set_auto_gain(False) # must be turned off for color tracking sensor.set_auto_whitebal(False) # must be turned off for color tracking clock = time.clock() # Only blobs that with more pixels than "pixel_threshold" and more area than "area_threshold" are # returned by "find_blobs" below. Change "pixels_threshold" and "area_threshold" if you change the # camera resolution. "merge=True" must be set to merge overlapping color blobs for color codes. while(True): clock.tick() img = sensor.snapshot() for blob in img.find_blobs(thresholds, pixels_threshold=100, area_threshold=100, merge=True): if blob.code() == 3: # r/g code == (1 << 1) | (1 << 0) # These values depend on the blob not being circular - otherwise they will be shaky. # if blob.elongation() > 0.5: # img.draw_edges(blob.min_corners(), color=(255,0,0)) # img.draw_line(blob.major_axis_line(), color=(0,255,0)) # img.draw_line(blob.minor_axis_line(), color=(0,0,255)) # These values are stable all the time. img.draw_rectangle(blob.rect()) img.draw_cross(blob.cx(), blob.cy()) # Note - the blob rotation is unique to 0-180 only. img.draw_keypoints([(blob.cx(), blob.cy(), int(math.degrees(blob.rotation())))], size=20) print(clock.fps())
这段代码是一个单色码跟踪的示例,使用了CanMV Cam进行跟踪。它会跟踪具有下列颜色的物体:
1. 红色:亮度范围在30到100之间,A通道范围在15到127之间,B通道范围在15到127之间。
2. 绿色:亮度范围在30到100之间,A通道范围在-64到-8之间,B通道范围在-32到32之间。
代码中使用了图像传感器来捕获图像,并进行颜色跟踪。通过设置阈值来确定跟踪颜色的范围。然后,使用`find_blobs`函数找到符合阈值要求的颜色块,并绘制出来。最后,打印出每秒处理的帧数。
请注意,这段代码中的阈值是一些通用的阈值,你可能需要根据实际情况进行调整。
esp32 ws2812b驱动方法
ESP32可以通过使用Adafruit Neopixel库来驱动WS2812B LED灯带。
以下是基本的步骤:
1. 下载并安装Adafruit Neopixel库。
2. 在Arduino IDE中打开一个新的项目,导入库并设置引脚和LED数量:
```c++
#include <Adafruit_NeoPixel.h>
#define LED_PIN 5
#define LED_COUNT 16
Adafruit_NeoPixel strip(LED_COUNT, LED_PIN, NEO_GRB + NEO_KHZ800);
```
3. 在setup函数中初始化LED灯带:
```c++
void setup() {
strip.begin();
strip.show(); // Initialize all pixels to 'off'
}
```
4. 在loop函数中设置LED颜色:
```c++
void loop() {
// Set LED colors
strip.setPixelColor(0, 255, 0, 0); // Red color for the first LED
strip.setPixelColor(1, 0, 255, 0); // Green color for the second LED
strip.setPixelColor(2, 0, 0, 255); // Blue color for the third LED
// Display the colors on the LED strip
strip.show();
// Wait for a short time before changing the colors again
delay(100);
}
```
这些步骤可以让ESP32驱动WS2812B LED灯带。你可以根据需要修改代码来控制不同的LED颜色和模式。