merge: remove tensorflow, AiService (#140)

package.json

@@ -58,8 +58,5 @@
 		"cypress": "13.4.0",
 		"eslint": "8.52.0",
 		"start-server-and-test": "2.0.1"
-	},
-	"optionalDependencies": {
-		"@tensorflow/tfjs-core": "4.4.0"
 	}
 }

packages/backend/package.json

@@ -38,8 +38,6 @@
 		"@swc/core-win32-arm64-msvc": "1.3.56",
 		"@swc/core-win32-ia32-msvc": "1.3.56",
 		"@swc/core-win32-x64-msvc": "1.3.56",
-		"@tensorflow/tfjs": "4.4.0",
-		"@tensorflow/tfjs-node": "4.4.0",
 		"bufferutil": "4.0.7",
 		"slacc-android-arm-eabi": "0.0.10",
 		"slacc-android-arm64": "0.0.10",
@@ -129,7 +127,6 @@
 		"nested-property": "4.0.0",
 		"node-fetch": "3.3.2",
 		"nodemailer": "6.9.7",
-		"nsfwjs": "2.4.2",
 		"oauth": "0.10.0",
 		"oauth2orize": "1.12.0",
 		"oauth2orize-pkce": "0.1.2",

packages/backend/src/core/AiService.ts

@@ -1,72 +0,0 @@
-/*
- * SPDX-FileCopyrightText: syuilo and other misskey contributors
- * SPDX-License-Identifier: AGPL-3.0-only
- */
-
-import * as fs from 'node:fs';
-import { fileURLToPath } from 'node:url';
-import { dirname } from 'node:path';
-import { Injectable } from '@nestjs/common';
-import * as nsfw from 'nsfwjs';
-import si from 'systeminformation';
-import { Mutex } from 'async-mutex';
-import { bindThis } from '@/decorators.js';
-
-const _filename = fileURLToPath(import.meta.url);
-const _dirname = dirname(_filename);
-
-const REQUIRED_CPU_FLAGS = ['avx2', 'fma'];
-let isSupportedCpu: undefined | boolean = undefined;
-
-@Injectable()
-export class AiService {
-	private model: nsfw.NSFWJS;
-	private modelLoadMutex: Mutex = new Mutex();
-
-	constructor(
-	) {
-	}
-
-	@bindThis
-	public async detectSensitive(path: string): Promise<nsfw.predictionType[] | null> {
-		try {
-			if (isSupportedCpu === undefined) {
-				const cpuFlags = await this.getCpuFlags();
-				isSupportedCpu = REQUIRED_CPU_FLAGS.every(required => cpuFlags.includes(required));
-			}
-
-			if (!isSupportedCpu) {
-				console.error('This CPU cannot use TensorFlow.');
-				return null;
-			}
-
-			const tf = await import('@tensorflow/tfjs-node');
-
-			if (this.model == null) {
-				await this.modelLoadMutex.runExclusive(async () => {
-					if (this.model == null) {
-						this.model = await nsfw.load(`file://${_dirname}/../../nsfw-model/`, { size: 299 });
-					}
-				});
-			}
-
-			const buffer = await fs.promises.readFile(path);
-			const image = await tf.node.decodeImage(buffer, 3) as any;
-			try {
-				const predictions = await this.model.classify(image);
-				return predictions;
-			} finally {
-				image.dispose();
-			}
-		} catch (err) {
-			console.error(err);
-			return null;
-		}
-	}
-
-	@bindThis
-	private async getCpuFlags(): Promise<string[]> {
-		const str = await si.cpuFlags();
-		return str.split(/\s+/);
-	}
-}

packages/backend/src/core/CoreModule.ts

@@ -6,7 +6,6 @@
 import { Module } from '@nestjs/common';
 import { AccountMoveService } from './AccountMoveService.js';
 import { AccountUpdateService } from './AccountUpdateService.js';
-import { AiService } from './AiService.js';
 import { AnnouncementService } from './AnnouncementService.js';
 import { AntennaService } from './AntennaService.js';
 import { AppLockService } from './AppLockService.js';
@@ -139,7 +138,6 @@ import type { Provider } from '@nestjs/common';
 const $LoggerService: Provider = { provide: 'LoggerService', useExisting: LoggerService };
 const $AccountMoveService: Provider = { provide: 'AccountMoveService', useExisting: AccountMoveService };
 const $AccountUpdateService: Provider = { provide: 'AccountUpdateService', useExisting: AccountUpdateService };
-const $AiService: Provider = { provide: 'AiService', useExisting: AiService };
 const $AnnouncementService: Provider = { provide: 'AnnouncementService', useExisting: AnnouncementService };
 const $AntennaService: Provider = { provide: 'AntennaService', useExisting: AntennaService };
 const $AppLockService: Provider = { provide: 'AppLockService', useExisting: AppLockService };
@@ -276,7 +274,6 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		LoggerService,
 		AccountMoveService,
 		AccountUpdateService,
-		AiService,
 		AnnouncementService,
 		AntennaService,
 		AppLockService,
@@ -406,7 +403,6 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$LoggerService,
 		$AccountMoveService,
 		$AccountUpdateService,
-		$AiService,
 		$AnnouncementService,
 		$AntennaService,
 		$AppLockService,
@@ -537,7 +533,6 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		LoggerService,
 		AccountMoveService,
 		AccountUpdateService,
-		AiService,
 		AnnouncementService,
 		AntennaService,
 		AppLockService,
@@ -666,7 +661,6 @@ const $ApQuestionService: Provider = { provide: 'ApQuestionService', useExisting
 		$LoggerService,
 		$AccountMoveService,
 		$AccountUpdateService,
-		$AiService,
 		$AnnouncementService,
 		$AntennaService,
 		$AppLockService,

packages/backend/src/core/DriveService.ts

@@ -461,36 +461,12 @@ export class DriveService {
 		requestHeaders = null,
 		ext = null,
 	}: AddFileArgs): Promise<MiDriveFile> {
-		let skipNsfwCheck = false;
 		const instance = await this.metaService.fetch();
 		const userRoleNSFW = user && (await this.roleService.getUserPolicies(user.id)).alwaysMarkNsfw;
-		if (user == null) {
-			skipNsfwCheck = true;
-		} else if (userRoleNSFW) {
-			skipNsfwCheck = true;
-		}
-		if (instance.sensitiveMediaDetection === 'none') skipNsfwCheck = true;
-		if (user && instance.sensitiveMediaDetection === 'local' && this.userEntityService.isRemoteUser(user)) skipNsfwCheck = true;
-		if (user && instance.sensitiveMediaDetection === 'remote' && this.userEntityService.isLocalUser(user)) skipNsfwCheck = true;
 
-		const info = await this.fileInfoService.getFileInfo(path, {
-			skipSensitiveDetection: skipNsfwCheck,
-			sensitiveThreshold: // 感度が高いほどしきい値は低くすることになる
-			instance.sensitiveMediaDetectionSensitivity === 'veryHigh' ? 0.1 :
-			instance.sensitiveMediaDetectionSensitivity === 'high' ? 0.3 :
-			instance.sensitiveMediaDetectionSensitivity === 'low' ? 0.7 :
-			instance.sensitiveMediaDetectionSensitivity === 'veryLow' ? 0.9 :
-			0.5,
-			sensitiveThresholdForPorn: 0.75,
-			enableSensitiveMediaDetectionForVideos: instance.enableSensitiveMediaDetectionForVideos,
-		});
+		const info = await this.fileInfoService.getFileInfo(path);
 		this.registerLogger.info(`${JSON.stringify(info)}`);
 
-		// 現状 false positive が多すぎて実用に耐えない
-		//if (info.porn && instance.disallowUploadWhenPredictedAsPorn) {
-		//	throw new IdentifiableError('282f77bf-5816-4f72-9264-aa14d8261a21', 'Detected as porn.');
-		//}
-
 		// detect name
 		const detectedName = correctFilename(
 			// DriveFile.nameは256文字, validateFileNameは200文字制限であるため、
@@ -586,7 +562,6 @@ export class DriveService {
 			: false;
 
 		if (info.sensitive && profile!.autoSensitive) file.isSensitive = true;
-		if (info.sensitive && instance.setSensitiveFlagAutomatically) file.isSensitive = true;
 		if (userRoleNSFW) file.isSensitive = true;
 
 		if (url !== null) {

packages/backend/src/core/FileInfoService.ts

@@ -5,19 +5,13 @@
 
 import * as fs from 'node:fs';
 import * as crypto from 'node:crypto';
-import { join } from 'node:path';
 import * as stream from 'node:stream/promises';
 import { Injectable } from '@nestjs/common';
-import { FSWatcher } from 'chokidar';
 import * as fileType from 'file-type';
-import FFmpeg from 'fluent-ffmpeg';
 import isSvg from 'is-svg';
 import probeImageSize from 'probe-image-size';
-import { type predictionType } from 'nsfwjs';
 import sharp from 'sharp';
 import { encode } from 'blurhash';
-import { createTempDir } from '@/misc/create-temp.js';
-import { AiService } from '@/core/AiService.js';
 import { bindThis } from '@/decorators.js';
 
 export type FileInfo = {
@@ -49,7 +43,6 @@ const TYPE_SVG = {
 @Injectable()
 export class FileInfoService {
 	constructor(
-		private aiService: AiService,
 	) {
 	}
 
@@ -57,12 +50,7 @@ export class FileInfoService {
 	 * Get file information
 	 */
 	@bindThis
-	public async getFileInfo(path: string, opts: {
-		skipSensitiveDetection: boolean;
-		sensitiveThreshold?: number;
-		sensitiveThresholdForPorn?: number;
-		enableSensitiveMediaDetectionForVideos?: boolean;
-	}): Promise<FileInfo> {
+	public async getFileInfo(path: string): Promise<FileInfo> {
 		const warnings = [] as string[];
 
 		const size = await this.getFileSize(path);
@@ -128,22 +116,8 @@ export class FileInfoService {
 			});
 		}
 
-		let sensitive = false;
-		let porn = false;
-
-		if (!opts.skipSensitiveDetection) {
-			await this.detectSensitivity(
-				path,
-				type.mime,
-				opts.sensitiveThreshold ?? 0.5,
-				opts.sensitiveThresholdForPorn ?? 0.75,
-				opts.enableSensitiveMediaDetectionForVideos ?? false,
-			).then(value => {
-				[sensitive, porn] = value;
-			}, error => {
-				warnings.push(`detectSensitivity failed: ${error}`);
-			});
-		}
+		const sensitive = false;
+		const porn = false;
 
 		return {
 			size,
@@ -159,150 +133,6 @@ export class FileInfoService {
 		};
 	}
 
-	@bindThis
-	private async detectSensitivity(source: string, mime: string, sensitiveThreshold: number, sensitiveThresholdForPorn: number, analyzeVideo: boolean): Promise<[sensitive: boolean, porn: boolean]> {
-		let sensitive = false;
-		let porn = false;
-
-		function judgePrediction(result: readonly predictionType[]): [sensitive: boolean, porn: boolean] {
-			let sensitive = false;
-			let porn = false;
-
-			if ((result.find(x => x.className === 'Sexy')?.probability ?? 0) > sensitiveThreshold) sensitive = true;
-			if ((result.find(x => x.className === 'Hentai')?.probability ?? 0) > sensitiveThreshold) sensitive = true;
-			if ((result.find(x => x.className === 'Porn')?.probability ?? 0) > sensitiveThreshold) sensitive = true;
-
-			if ((result.find(x => x.className === 'Porn')?.probability ?? 0) > sensitiveThresholdForPorn) porn = true;
-
-			return [sensitive, porn];
-		}
-
-		if ([
-			'image/jpeg',
-			'image/png',
-			'image/webp',
-		].includes(mime)) {
-			const result = await this.aiService.detectSensitive(source);
-			if (result) {
-				[sensitive, porn] = judgePrediction(result);
-			}
-		} else if (analyzeVideo && (mime === 'image/apng' || mime.startsWith('video/'))) {
-			const [outDir, disposeOutDir] = await createTempDir();
-			try {
-				const command = FFmpeg()
-					.input(source)
-					.inputOptions([
-						'-skip_frame', 'nokey', // 可能ならキーフレームのみを取得してほしいとする（そうなるとは限らない）
-						'-lowres', '3', // 元の画質でデコードする必要はないので 1/8 画質でデコードしてもよいとする（そうなるとは限らない）
-					])
-					.noAudio()
-					.videoFilters([
-						{
-							filter: 'select', // フレームのフィルタリング
-							options: {
-								e: 'eq(pict_type,PICT_TYPE_I)', // I-Frame のみをフィルタする（VP9 とかはデコードしてみないとわからないっぽい）
-							},
-						},
-						{
-							filter: 'blackframe', // 暗いフレームの検出
-							options: {
-								amount: '0', // 暗さに関わらず全てのフレームで測定値を取る
-							},
-						},
-						{
-							filter: 'metadata',
-							options: {
-								mode: 'select', // フレーム選択モード
-								key: 'lavfi.blackframe.pblack', // フレームにおける暗部の百分率（前のフィルタからのメタデータを参照する）
-								value: '50',
-								function: 'less', // 50% 未満のフレームを選択する（50% 以上暗部があるフレームだと誤検知を招くかもしれないので）
-							},
-						},
-						{
-							filter: 'scale',
-							options: {
-								w: 299,
-								h: 299,
-							},
-						},
-					])
-					.format('image2')
-					.output(join(outDir, '%d.png'))
-					.outputOptions(['-vsync', '0']); // 可変フレームレートにすることで穴埋めをさせない
-				const results: ReturnType<typeof judgePrediction>[] = [];
-				let frameIndex = 0;
-				let targetIndex = 0;
-				let nextIndex = 1;
-				for await (const path of this.asyncIterateFrames(outDir, command)) {
-					try {
-						const index = frameIndex++;
-						if (index !== targetIndex) {
-							continue;
-						}
-						targetIndex = nextIndex;
-						nextIndex += index; // fibonacci sequence によってフレーム数制限を掛ける
-						const result = await this.aiService.detectSensitive(path);
-						if (result) {
-							results.push(judgePrediction(result));
-						}
-					} finally {
-						fs.promises.unlink(path);
-					}
-				}
-				sensitive = results.filter(x => x[0]).length >= Math.ceil(results.length * sensitiveThreshold);
-				porn = results.filter(x => x[1]).length >= Math.ceil(results.length * sensitiveThresholdForPorn);
-			} finally {
-				disposeOutDir();
-			}
-		}
-
-		return [sensitive, porn];
-	}
-
-	private async *asyncIterateFrames(cwd: string, command: FFmpeg.FfmpegCommand): AsyncGenerator<string, void> {
-		const watcher = new FSWatcher({
-			cwd,
-			disableGlobbing: true,
-		});
-		let finished = false;
-		command.once('end', () => {
-			finished = true;
-			watcher.close();
-		});
-		command.run();
-		for (let i = 1; true; i++) { // eslint-disable-line @typescript-eslint/no-unnecessary-condition
-			const current = `${i}.png`;
-			const next = `${i + 1}.png`;
-			const framePath = join(cwd, current);
-			if (await this.exists(join(cwd, next))) {
-				yield framePath;
-			} else if (!finished) { // eslint-disable-line @typescript-eslint/no-unnecessary-condition
-				watcher.add(next);
-				await new Promise<void>((resolve, reject) => {
-					watcher.on('add', function onAdd(path) {
-						if (path === next) { // 次フレームの書き出しが始まっているなら、現在フレームの書き出しは終わっている
-							watcher.unwatch(current);
-							watcher.off('add', onAdd);
-							resolve();
-						}
-					});
-					command.once('end', resolve); // 全てのフレームを処理し終わったなら、最終フレームである現在フレームの書き出しは終わっている
-					command.once('error', reject);
-				});
-				yield framePath;
-			} else if (await this.exists(framePath)) {
-				yield framePath;
-			} else {
-				return;
-			}
-		}
-	}
-
-	@bindThis
-	private exists(path: string): Promise<boolean> {
-		return fs.promises.access(path).then(() => true, () => false);
-	}
-
 	@bindThis
 	public fixMime(mime: string | fileType.MimeType): string {
 		// see https://github.com/misskey-dev/misskey/pull/10686

packages/backend/src/server/api/endpoints/admin/update-meta.ts

@@ -292,22 +292,6 @@ export default class extends Endpoint<typeof meta, typeof paramDef> { // eslint-
 				set.turnstileSecretKey = ps.turnstileSecretKey;
 			}
 
-			if (ps.sensitiveMediaDetection !== undefined) {
-				set.sensitiveMediaDetection = ps.sensitiveMediaDetection;
-			}
-
-			if (ps.sensitiveMediaDetectionSensitivity !== undefined) {
-				set.sensitiveMediaDetectionSensitivity = ps.sensitiveMediaDetectionSensitivity;
-			}
-
-			if (ps.setSensitiveFlagAutomatically !== undefined) {
-				set.setSensitiveFlagAutomatically = ps.setSensitiveFlagAutomatically;
-			}
-
-			if (ps.enableSensitiveMediaDetectionForVideos !== undefined) {
-				set.enableSensitiveMediaDetectionForVideos = ps.enableSensitiveMediaDetectionForVideos;
-			}
-
 			if (ps.enableBotTrending !== undefined) {
 				set.enableBotTrending = ps.enableBotTrending;
 			}

packages/backend/test/unit/FileInfoService.ts

@@ -14,7 +14,6 @@ import { describe, beforeAll, afterAll, test } from '@jest/globals';
 import { GlobalModule } from '@/GlobalModule.js';
 import { FileInfoService } from '@/core/FileInfoService.js';
 //import { DI } from '@/di-symbols.js';
-import { AiService } from '@/core/AiService.js';
 import type { TestingModule } from '@nestjs/testing';
 import type { MockFunctionMetadata } from 'jest-mock';
 
@@ -34,14 +33,10 @@ describe('FileInfoService', () => {
 				GlobalModule,
 			],
 			providers: [
-				AiService,
 				FileInfoService,
 			],
 		})
 			.useMocker((token) => {
-				//if (token === AiService) {
-				//	return {  };
-				//}
 				if (typeof token === 'function') {
 					const mockMetadata = moduleMocker.getMetadata(token) as MockFunctionMetadata<any, any>;
 					const Mock = moduleMocker.generateFromMetadata(mockMetadata);
@@ -61,7 +56,7 @@ describe('FileInfoService', () => {
 
 	test('Empty file', async () => {
 		const path = `${resources}/emptyfile`;
-		const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+		const info = await fileInfoService.getFileInfo(path) as any;
 		delete info.warnings;
 		delete info.blurhash;
 		delete info.sensitive;
@@ -82,7 +77,7 @@ describe('FileInfoService', () => {
 	describe('IMAGE', () => {
 		test('Generic JPEG', async () => {
 			const path = `${resources}/Lenna.jpg`;
-			const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+			const info = await fileInfoService.getFileInfo(path) as any;
 			delete info.warnings;
 			delete info.blurhash;
 			delete info.sensitive;
@@ -102,7 +97,7 @@ describe('FileInfoService', () => {
 
 		test('Generic APNG', async () => {
 			const path = `${resources}/anime.png`;
-			const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+			const info = await fileInfoService.getFileInfo(path) as any;
 			delete info.warnings;
 			delete info.blurhash;
 			delete info.sensitive;
@@ -122,7 +117,7 @@ describe('FileInfoService', () => {
 
 		test('Generic AGIF', async () => {
 			const path = `${resources}/anime.gif`;
-			const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+			const info = await fileInfoService.getFileInfo(path) as any;
 			delete info.warnings;
 			delete info.blurhash;
 			delete info.sensitive;
@@ -142,7 +137,7 @@ describe('FileInfoService', () => {
 
 		test('PNG with alpha', async () => {
 			const path = `${resources}/with-alpha.png`;
-			const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+			const info = await fileInfoService.getFileInfo(path) as any;
 			delete info.warnings;
 			delete info.blurhash;
 			delete info.sensitive;
@@ -162,7 +157,7 @@ describe('FileInfoService', () => {
 
 		test('Generic SVG', async () => {
 			const path = `${resources}/image.svg`;
-			const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+			const info = await fileInfoService.getFileInfo(path) as any;
 			delete info.warnings;
 			delete info.blurhash;
 			delete info.sensitive;
@@ -183,7 +178,7 @@ describe('FileInfoService', () => {
 		test('SVG with XML definition', async () => {
 			// https://github.com/misskey-dev/misskey/issues/4413
 			const path = `${resources}/with-xml-def.svg`;
-			const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+			const info = await fileInfoService.getFileInfo(path) as any;
 			delete info.warnings;
 			delete info.blurhash;
 			delete info.sensitive;
@@ -203,7 +198,7 @@ describe('FileInfoService', () => {
 
 		test('Dimension limit', async () => {
 			const path = `${resources}/25000x25000.png`;
-			const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+			const info = await fileInfoService.getFileInfo(path) as any;
 			delete info.warnings;
 			delete info.blurhash;
 			delete info.sensitive;
@@ -223,7 +218,7 @@ describe('FileInfoService', () => {
 
 		test('Rotate JPEG', async () => {
 			const path = `${resources}/rotate.jpg`;
-			const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+			const info = await fileInfoService.getFileInfo(path) as any;
 			delete info.warnings;
 			delete info.blurhash;
 			delete info.sensitive;
@@ -245,7 +240,7 @@ describe('FileInfoService', () => {
 	describe('AUDIO', () => {
 		test('MP3', async () => {
 			const path = `${resources}/kick_gaba7.mp3`;
-			const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+			const info = await fileInfoService.getFileInfo(path) as any;
 			delete info.warnings;
 			delete info.blurhash;
 			delete info.sensitive;
@@ -265,7 +260,7 @@ describe('FileInfoService', () => {
 
 		test('WAV', async () => {
 			const path = `${resources}/kick_gaba7.wav`;
-			const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+			const info = await fileInfoService.getFileInfo(path) as any;
 			delete info.warnings;
 			delete info.blurhash;
 			delete info.sensitive;
@@ -285,7 +280,7 @@ describe('FileInfoService', () => {
 
 		test('AAC', async () => {
 			const path = `${resources}/kick_gaba7.aac`;
-			const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+			const info = await fileInfoService.getFileInfo(path) as any;
 			delete info.warnings;
 			delete info.blurhash;
 			delete info.sensitive;
@@ -305,7 +300,7 @@ describe('FileInfoService', () => {
 
 		test('FLAC', async () => {
 			const path = `${resources}/kick_gaba7.flac`;
-			const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+			const info = await fileInfoService.getFileInfo(path) as any;
 			delete info.warnings;
 			delete info.blurhash;
 			delete info.sensitive;
@@ -327,7 +322,7 @@ describe('FileInfoService', () => {
 		 * video/webmとして検出されてしまう
 		test('WEBM AUDIO', async () => {
 			const path = `${resources}/kick_gaba7.webm`;
-			const info = await fileInfoService.getFileInfo(path, { skipSensitiveDetection: true }) as any;
+			const info = await fileInfoService.getFileInfo(path) as any;
 			delete info.warnings;
 			delete info.blurhash;
 			delete info.sensitive;

packages/frontend/src/pages/admin/security.vue

@@ -20,49 +20,6 @@ SPDX-License-Identifier: AGPL-3.0-only
 					<XBotProtection/>
 				</MkFolder>
 
-				<MkFolder>
-					<template #icon><i class="ph-eye-slash ph-bold ph-lg"></i></template>
-					<template #label>{{ i18n.ts.sensitiveMediaDetection }}</template>
-					<template v-if="sensitiveMediaDetection === 'all'" #suffix>{{ i18n.ts.all }}</template>
-					<template v-else-if="sensitiveMediaDetection === 'local'" #suffix>{{ i18n.ts.localOnly }}</template>
-					<template v-else-if="sensitiveMediaDetection === 'remote'" #suffix>{{ i18n.ts.remoteOnly }}</template>
-					<template v-else #suffix>{{ i18n.ts.none }}</template>
-
-					<div class="_gaps_m">
-						<span>{{ i18n.ts._sensitiveMediaDetection.description }}</span>
-
-						<MkRadios v-model="sensitiveMediaDetection">
-							<option value="none">{{ i18n.ts.none }}</option>
-							<option value="all">{{ i18n.ts.all }}</option>
-							<option value="local">{{ i18n.ts.localOnly }}</option>
-							<option value="remote">{{ i18n.ts.remoteOnly }}</option>
-						</MkRadios>
-
-						<MkRange v-model="sensitiveMediaDetectionSensitivity" :min="0" :max="4" :step="1" :textConverter="(v) => `${v + 1}`">
-							<template #label>{{ i18n.ts._sensitiveMediaDetection.sensitivity }}</template>
-							<template #caption>{{ i18n.ts._sensitiveMediaDetection.sensitivityDescription }}</template>
-						</MkRange>
-
-						<MkSwitch v-model="enableSensitiveMediaDetectionForVideos">
-							<template #label>{{ i18n.ts._sensitiveMediaDetection.analyzeVideos }}<span class="_beta">{{ i18n.ts.beta }}</span></template>
-							<template #caption>{{ i18n.ts._sensitiveMediaDetection.analyzeVideosDescription }}</template>
-						</MkSwitch>
-
-						<MkSwitch v-model="setSensitiveFlagAutomatically">
-							<template #label>{{ i18n.ts._sensitiveMediaDetection.setSensitiveFlagAutomatically }} ({{ i18n.ts.notRecommended }})</template>
-							<template #caption>{{ i18n.ts._sensitiveMediaDetection.setSensitiveFlagAutomaticallyDescription }}</template>
-						</MkSwitch>
-
-						<!-- 現状 false positive が多すぎて実用に耐えない
-						<MkSwitch v-model="disallowUploadWhenPredictedAsPorn">
-							<template #label>{{ i18n.ts._sensitiveMediaDetection.disallowUploadWhenPredictedAsPorn }}</template>
-						</MkSwitch>
-						-->
-
-						<MkButton primary @click="save"><i class="ph-floppy-disk ph-bold ph-lg"></i> {{ i18n.ts.save }}</MkButton>
-					</div>
-				</MkFolder>
-
 				<MkFolder>
 					<template #label>Active Email Validation</template>
 					<template v-if="enableActiveEmailValidation" #suffix>Enabled</template>
@@ -126,10 +83,6 @@ let summalyProxy: string = $ref('');
 let enableHcaptcha: boolean = $ref(false);
 let enableRecaptcha: boolean = $ref(false);
 let enableTurnstile: boolean = $ref(false);
-let sensitiveMediaDetection: string = $ref('none');
-let sensitiveMediaDetectionSensitivity: number = $ref(0);
-let setSensitiveFlagAutomatically: boolean = $ref(false);
-let enableSensitiveMediaDetectionForVideos: boolean = $ref(false);
 let enableIpLogging: boolean = $ref(false);
 let enableActiveEmailValidation: boolean = $ref(false);
 
@@ -139,15 +92,6 @@ async function init() {
 	enableHcaptcha = meta.enableHcaptcha;
 	enableRecaptcha = meta.enableRecaptcha;
 	enableTurnstile = meta.enableTurnstile;
-	sensitiveMediaDetection = meta.sensitiveMediaDetection;
-	sensitiveMediaDetectionSensitivity =
-		meta.sensitiveMediaDetectionSensitivity === 'veryLow' ? 0 :
-		meta.sensitiveMediaDetectionSensitivity === 'low' ? 1 :
-		meta.sensitiveMediaDetectionSensitivity === 'medium' ? 2 :
-		meta.sensitiveMediaDetectionSensitivity === 'high' ? 3 :
-		meta.sensitiveMediaDetectionSensitivity === 'veryHigh' ? 4 : 0;
-	setSensitiveFlagAutomatically = meta.setSensitiveFlagAutomatically;
-	enableSensitiveMediaDetectionForVideos = meta.enableSensitiveMediaDetectionForVideos;
 	enableIpLogging = meta.enableIpLogging;
 	enableActiveEmailValidation = meta.enableActiveEmailValidation;
 }
@@ -155,16 +99,6 @@ async function init() {
 function save() {
 	os.apiWithDialog('admin/update-meta', {
 		summalyProxy,
-		sensitiveMediaDetection,
-		sensitiveMediaDetectionSensitivity:
-			sensitiveMediaDetectionSensitivity === 0 ? 'veryLow' :
-			sensitiveMediaDetectionSensitivity === 1 ? 'low' :
-			sensitiveMediaDetectionSensitivity === 2 ? 'medium' :
-			sensitiveMediaDetectionSensitivity === 3 ? 'high' :
-			sensitiveMediaDetectionSensitivity === 4 ? 'veryHigh' :
-			0,
-		setSensitiveFlagAutomatically,
-		enableSensitiveMediaDetectionForVideos,
 		enableIpLogging,
 		enableActiveEmailValidation,
 	}).then(() => {