利用 chaquopy 运行 Python 代码在‘Android studio 中，

[momosolaris]

各位大佬们，我需要你们的帮助！
题目：

我正在创建一个涉及图像转换的应用程序，利用 chaquopy （ https://github.com/chaquo ）来在 android studio 中运行 python 代码，来处理图像转换。

在其中，我必须将图像从 java 发送到 python 文件，并使用图像数据进行图像处理，例如在这里我需要实现 gabor 变换。

但不幸的是，我得到的结果是一张完全黑色的照片。

我们必须将图像转换为位图，然后将位图发送到
数组到 Python.--我的理解正确吗？

my gabor.py under src/main/python folder

import cv2
import numpy as np
import math

import base64

np.set_printoptions(threshold= np.inf)
def trans_gabor(data, wavelength, orientation):
image = np.frombuffer(base64.b64decode(data), dtype=np.uint8)
image = cv2.imdecode(image, cv2.COLOR_BGR2GRAY)
orientation = - orientation / 180 * math.pi
sigma = 0.5 * wavelength * 1
gamma = 0.5
shape = 1 + 2 * math.ceil(16 * sigma)
shape = (shape, shape)
scale_fctr = 1/wavelength # percent of original size
gabor_filter_imag = cv2.getGaborKernel(shape, sigma, orientation, wavelength, gamma, psi=math.pi/2)
gabor_im = cv2.filter2D(image, -1, gabor_filter_imag)
width = math.ceil(gabor_im.shape[1] * scale_fctr)
height = math.ceil(gabor_im.shape[0] * scale_fctr)
grayImage = cv2.resize(gabor_im, (width, height), interpolation=cv2.INTER_CUBIC)
MedianTreshold = 255
(thresh, blackAndWhiteImage) = cv2.threshold(grayImage, MedianTreshold, 255, cv2.THRESH_BINARY)
blackAndWhiteImage = blackAndWhiteImage/255
_, buffer = cv2.imencode('.png', blackAndWhiteImage)
return base64.b64encode(buffer).decode()



and my MainACtivtiy.class
import androidx.annotation.Nullable;
import androidx.appcompat.app.AppCompatActivity;

import android.annotation.SuppressLint;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.os.Bundle;
import android.os.Environment;
import android.os.ParcelFileDescriptor;
import android.provider.MediaStore;
import android.util.Base64;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.ImageView;
import android.widget.TextView;
import android.widget.Toast;

import com.chaquo.python.PyObject;
import com.chaquo.python.Python;
import com.chaquo.python.android.AndroidPlatform;

import org.beyka.tiffbitmapfactory.TiffBitmapFactory;

import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.Locale;

public class MainActivity2 extends AppCompatActivity {

Bitmap bmp1;
EditText gabor_a1;
EditText gabor_a2 ;

String imageString;
//String x ;
//String y ;
String ImageString;

Uri uri;



ImageView imageView3;
Button button3;
Button button4;

ImageView imageView4;

private static final int REQUEST_CODE = 1;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main2);

imageView3 =findViewById(R.id.imageView3);
imageView4 = findViewById(R.id.imageView4);
button3 = findViewById(R.id.button3);
button4 = findViewById(R.id.button4);
gabor_a1= findViewById(R.id.gabor_a1);// wavelet
gabor_a2 = findViewById(R.id.gabor_a2);// orientation




if(!Python.isStarted())
Python.start(new AndroidPlatform(this));


button3.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {



Intent intent = new Intent();
intent.setAction(Intent.ACTION_PICK);
intent.setDataAndType(MediaStore.Images.Media.EXTERNAL_CONTENT_URI,"image/*");
startActivityForResult(intent, REQUEST_CODE);
}
});

button4.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
int a_value = Integer.parseInt(gabor_a1.getText().toString());
int b_value = Integer.parseInt(gabor_a2.getText().toString());


Bitmap bitmap = null;

try {
bitmap = MediaStore.Images.Media.getBitmap(getContentResolver(), uri);
PyObject transGaborFunc = Python.getInstance().getModule("gabor").get("trans_gabor");


ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteArrayOutputStream);
byte[] byteArray = byteArrayOutputStream.toByteArray();
String imageString = Base64.encodeToString(byteArray, Base64.DEFAULT);

PyObject result = transGaborFunc.call(imageString, a_value, b_value);
String resultString = result.toString();
byte[] decodedString = Base64.decode(resultString, Base64.DEFAULT);
Bitmap resultBitmap = BitmapFactory.decodeByteArray(decodedString, 0, decodedString.length);

imageView4.setImageBitmap(resultBitmap); // ImageView1

} catch (IOException e) {
e.printStackTrace();
}


}
});

}

}

protected void onActivityResult(int requestCode, int resultCode, @Nullable Intent data) {
super.onActivityResult(requestCode, resultCode, data);

if (requestCode == REQUEST_CODE && resultCode == RESULT_OK && data != null) {

uri = data.getData();



imageView3.setImageURI(uri);



}
}

}
这是我在 stackoverflow 写的，里面有图，就是得到的结果是个黑色的图像！ 谁能帮我看一下，我到底哪里错了！我有点难过，这么点 code 就是出不来结果图像

https://stackoverflow.com/questions/75620836/image-processing-using-chaquopy-in-android-studio-error-output-with-gabor-transf