我想保存一个图像使用opencv的imwrite没有任何扩展。我知道cv2.imwrite中的图像格式是基于filename扩展选择的。是否有一种方法可以在调用函数时指定压缩格式,或者必须在创建文件后重命名该文件?
cv2.imwrite(filename, img)
[Out]: /home/travis/miniconda/conda-bld/work/opencv-3.1.0/modules/imgcodecs/src/loadsave.cpp:459: error: (-2) could not find a writer for the specified extension in
如果测试失败,我希望能够将数据保存到磁盘。有没有办法在googletest框架内做到这一点?
TEST_F(test_similarity,are_similar) {
ASSERT_GT(1e-10,norm(im0,im1));
// If test fails save images to disk for comparison:
imwrite("im0.png",im0);
imwrite("im1.png",im1);
}
我正在尝试使用OpenCV 3.1.0和C++制作一个对象跟踪器,下面是。
cvtColor()函数有一些问题,因为它改变了图像的颜色,而不是颜色空间。我有这样的代码:
Mat original_image;
original_image = imread(argv[1], CV_LOAD_IMAGE_COLOR); // The image is passed as arg
if (!original_image.data)
{
printf("Problem!\n");
return -1;
}
// From BGR to HSV
Mat hsv_ima
我正在寻找将图像像素数据提取到整数列表(或任何数字表示)中。例如,有一个2x2的白色图像,结果将是255,255,255。如果图像是生成的,而不是从磁盘读取,Mat.dump()方法将准确地打印图像像素值:
Mat m = new Mat(5, 10, CvType.CV_8UC1, new Scalar(0));
System.out.println("OpenCV Mat: " + m);
Mat mr1 = m.row(1);
mr1.setTo(new Scalar(1));
Mat mc5 = m.col(5);
mc5
我有以下imwrite语句:
imwrite(img, strcat(thisdir,'_',num2str(j),'_LABEL_',categoryClassifier.Labels(labelIdx),'.jpg'));
其中categoryClassifier.Labels(labelIdx)返回一个string,thisdir也是一个返回目录名的string。但是,我得到以下错误:
Error using imwrite>parse_inputs (line 510)
A filename must be supplied.
E
我试图在我的OpenCV安卓应用程序中使用Imgcodecs.imwrite,但它总是给我错误:
No implementation found for boolean org.opencv.imgcodecs.Imgcodecs.imwrite_1(java.lang.String, long) (tried Java_org_opencv_imgcodecs_Imgcodecs_imwrite_11 and Java_org_opencv_imgcodecs_Imgcodecs_imwrite_11__Ljava_lang_String_2J)
我的代码是:
private void t
我使用matlab工具箱阅读nifti图像,但我们如何才能一片一片地编写成另一种格式,如.jpg或png?我试着这样做:
V=niftiread('Brats17_2013_2_1_flair.nii.gz');
imshow(V(:,:,1),[]);
imwrite(V,'test.jpg')
Error using imwrite (line 442)
Cannot write signed integer data to a JPEG file.
imwrite((V(:,:,1),[]),'test.jpg');
imwrite((V(
以下代码不起作用,它在将图像写入磁盘之前将值转换为np.uint8。
import cv2
import numpy as np
# Generate dummy gradient with float values
arr = np.arange(0,10,0.02)
arr = np.repeat(arr, arr.shape[0])
arr.reshape((500,500))
cv2.imwrite('output.exr',arr)
# At this point, returns True. Opening the image with OpenEXR 1.4 sh
我已经安装了opencv版本1.0.1,当我使用cv2.imwrite()方法时,它会抛出以下错误
OpenCV Error: Unspecified error (could not find a writer for the
specified extension) in imwrite_, file
/io/opencv/modules/imgcodecs/src/loadsave.cpp, line 604 Traceback
(most recent call last): File "scan.py", line 78, in <module>
fi
def gcd(m, n):
fm = []
for i in range(1, m + 1):
if (m % i) == 0:
fm.append(i)
fn = []
for j in range(1, n + 1):
if (n % i) == 0:
fn.append(j)
cf = []
for f in fm:
if f in fn:
cf.append(f)
return (cf[-1]) for i in pick:
if scores[i] > min_threshold:
box = boxes_pixels[i]
box