Шумы на белом фоне при ресайзе изображения

imagefilter($sourceImage, IMG_FILTER_NEGATE);
                         
imagecopyresampled($picture, $sourceImage,
                               0, 0, $arSourceSize["x"], $arSourceSize["y"],
                               $arDestinationSize["width"], $arDestinationSize["height"], $arSourceSize["width"], $arSourceSize["height"]);
                                   
imagefilter($picture, IMG_FILTER_NEGATE); 

\Bitrix\Main\EventManager::getInstance()->addEventHandler(
    "main",
    "OnAfterResizeImage",
    array(
        "Handlers",
        "checkBadPictures"
    )
);

class Handlers{
    public static function checkBadPictures(
        $file,
        $options,
        &$callbackData,
        &$cacheImageFile,
        &$cacheImageFileTmp,
        &$arImageSize
    ) {
        if (file_exists($cacheImageFileTmp)) {
            if (stripos($cacheImageFileTmp, 'png') !== false) {
                $maxColor = 251;
                $oldImg = imagecreatefrompng($cacheImageFileTmp);
                $sizes = getimagesize($cacheImageFileTmp);
                $newImg = imagecreatetruecolor($sizes[0], $sizes[1]);
                imagealphablending($newImg, false);
                imagesavealpha($newImg, true);
                imagecopyresampled($newImg, $oldImg, 0, 0, 0, 0, $sizes[0], $sizes[1], $sizes[0], $sizes[1]);
                $colorWhite = imagecolorallocate($newImg, 255, 255, 255);
                for ($y = 0; $y < ($sizes[1]); ++$y) {
                    for ($x = 0; $x < ($sizes[0]); ++$x) {
                        $isTransparent = false;
                        $colorat = imagecolorat($newImg, $x, $y);
                        if(($colorat & 0x7F000000) >> 24) {
                            $isTransparent = true;
                        }
                        $r = ($colorat >> 16) & 0xFF;
                        $g = ($colorat >> 8) & 0xFF;
                        $b = $colorat & 0xFF;

                        // Если цвет пикселя нас не устраивает, заменяем его на белый
                        if (($r >= $maxColor && $g >= $maxColor && $b >= $maxColor) || ($isTransparent)) {
                            imagesetpixel($newImg, $x, $y, $colorWhite);
                        }
                    }
                }
                imagepng($newImg, $cacheImageFileTmp, 9);
            }
            if (stripos($cacheImageFileTmp, 'jpg') !== false || stripos($cacheImageFileTmp, 'jpeg') !== false) {
                $maxColor = 251;
                $oldImg = imagecreatefromjpeg($cacheImageFileTmp);
                $sizes = getimagesize($cacheImageFileTmp);
                $newImg = imagecreatetruecolor($sizes[0], $sizes[1]);
                imagecopyresampled($newImg, $oldImg, 0, 0, 0, 0, $sizes[0], $sizes[1], $sizes[0], $sizes[1]);
                $colorWhite = imagecolorallocate($newImg, 255, 255, 255);
                for ($y = 0; $y < ($sizes[1]); ++$y) {
                    for ($x = 0; $x < ($sizes[0]); ++$x) {
                        $colorat = imagecolorat($newImg, $x, $y);
                        $r = ($colorat >> 16) & 0xFF;
                        $g = ($colorat >> 8) & 0xFF;
                        $b = $colorat & 0xFF;

                        // Если цвет пикселя нас не устраивает, заменяем его на белый
                        if (($r >= $maxColor && $g >= $maxColor && $b >= $maxColor)) {
                            imagesetpixel($newImg, $x, $y, $colorWhite);
                        }
                    }
                }
                imagejpeg($newImg, $cacheImageFileTmp, 100);
            }
        }
    }
}

        public function getIMGSize($arFile, $width, $height){
            if (empty($arFile) || !$width || !$height)
                return FALSE;

            if ($arFile['WIDTH'] >= $arFile['HEIGHT']){
                $width  = $arFile['WIDTH'] > $width ? $width : $arFile['WIDTH'];
                $height = $width * ($arFile['HEIGHT'] / $arFile['WIDTH']);
            }else{
                $height = $arFile['HEIGHT'] > $height ? $height : $arFile['HEIGHT'];
                $width  = $height * ($arFile['WIDTH'] / $arFile['HEIGHT']);
            }
 
            return [
                'WIDTH' => $width,
                'HEIGHT'=> $height
            ];
        }

        $arFile = (is_array($arItem["PREVIEW_PICTURE"]) ? $arItem["PREVIEW_PICTURE"] : CFile::GetFileArray($arItem["PREVIEW_PICTURE"]));
        $arSize = CClass::getIMGSize($arFile, $max_width, $max_height);
        $arItem["RESIZED"] = CFile::ResizeImageGet(
            $arFile,
            [
                'width' => $arSize['WIDTH'],
                'height' => $arSize['HEIGHT']
            ],
            BX_RESIZE_IMAGE_EXACT,
            true
        );