我克服了很多解决方案和建议,但没有一个对我有用。我正在使用 dropzone 进行图像上传,并使用 cropper js 来裁剪图像。但是每次我裁剪图像后,图像质量都会降低(模糊)
实际图片
裁剪图片
/image/snAuB.png
//This is my cropper js code, As per the documentation I have set max height, max width, imageSmoothingQuality etc. But still image qualty get reduced after crop.
var $cropperModal = $("<div>Company Logo</div>");
$cropperModal.modal('show').on("shown.bs.modal", function() {
var $image = $('#img-' + c);
var cropper = $image.cropper({
aspectRatio: 1//,
}).on('hidden.bs.modal', function() {
$image.cropper('destroy');
});
//After I uploaded the image, Below code allow me to crop the image
$cropperModal.on('click', '.crop-upload', function() {
$image.cropper('getCroppedCanvas', {
width: 160,
height: 90,
minWidth: 256,
minHeight: 256,
maxWidth: 4096,
maxHeight: 4096,
fillColor: '#fff',
imageSmoothingEnabled: false,
imageSmoothingQuality: 'high'
})
.toBlob(function(blob) {
// Create a new Dropzone file thumbnail
myDropZone.createThumbnail(
blob,
myDropZone.options.thumbnailWidth,
myDropZone.options.thumbnailHeight,
myDropZone.options.thumbnailMethod,
false,
function(dataURL) {
// Update the Dropzone file thumbnail
myDropZone.emit('thumbnail', file, dataURL);
// Return the file to Dropzone
done(blob);
});
$cropperModal.modal('hide');
});
})
.on('click', '.rotate-right', function() {
$image.cropper('rotate', 90);
})
.on('click', '.rotate-left', function() {
$image.cropper('rotate', -90);
})
.on('click', '.reset', function() {
$image.cropper('reset');
})
});
}```
最佳答案
我在使用 cropper js 时遇到了同样的问题,以下是适合我的解决方案。 (我在这里分享,以便它可以帮助别人)
将参数 qualityArgument 设置为 toBlob 方法的值 1
设置 imageSmoothingEnabled 为 getCroppedCanvas 的 true 并且没有设置 高度、宽度
cropper.getCroppedCanvas({ minWidth: 256, minHeight: 256, maxWidth: 4096, maxHeight: 4096, fillColor: '#fff', imageSmoothingEnabled: true, imageSmoothingQuality: 'high', }); cropper.getCroppedCanvas().toBlob(function (blob) { var formData = new FormData(); formData.append('upload', blob, 'imagetest.jpeg'); $.ajax('/ListingManager/Images/index', { method: 'POST', data: formData, processData: false, contentType: false, success: function () { console.log('success'); }, error: function () { console.log('error'); } }); }, 'image/jpeg', 1);
这是结果
关于javascript - 使用 Cropper js 裁剪后图像质量降低,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/56573339/