diff --git a/locales/index.d.ts b/locales/index.d.ts
index 07513ba644..1ae19617c7 100644
--- a/locales/index.d.ts
+++ b/locales/index.d.ts
@@ -12112,6 +12112,14 @@ export interface Locale extends ILocale {
              * 歪み
              */
             "distort": string;
+            /**
+             * 二値化
+             */
+            "threshold": string;
+            /**
+             * 集中線
+             */
+            "zoomLines": string;
         };
     };
 }
diff --git a/locales/ja-JP.yml b/locales/ja-JP.yml
index 966378be73..7119f90c85 100644
--- a/locales/ja-JP.yml
+++ b/locales/ja-JP.yml
@@ -3246,3 +3246,5 @@ _imageEffector:
     colorClamp: "色の圧縮"
     colorClampAdvanced: "色の圧縮(高度)"
     distort: "歪み"
+    threshold: "二値化"
+    zoomLines: "集中線"
diff --git a/packages/frontend/src/utility/image-effector/fxs.ts b/packages/frontend/src/utility/image-effector/fxs.ts
index 1927e0c8d8..f95ad9eff9 100644
--- a/packages/frontend/src/utility/image-effector/fxs.ts
+++ b/packages/frontend/src/utility/image-effector/fxs.ts
@@ -11,7 +11,9 @@ import { FX_glitch } from './fxs/glitch.js';
 import { FX_grayscale } from './fxs/grayscale.js';
 import { FX_invert } from './fxs/invert.js';
 import { FX_mirror } from './fxs/mirror.js';
+import { FX_threshold } from './fxs/threshold.js';
 import { FX_watermarkPlacement } from './fxs/watermarkPlacement.js';
+import { FX_zoomLines } from './fxs/zoomLines.js';
 import type { ImageEffectorFx } from './ImageEffector.js';
 
 export const FXS = [
@@ -24,4 +26,6 @@ export const FXS = [
 	FX_colorClamp,
 	FX_colorClampAdvanced,
 	FX_distort,
+	FX_threshold,
+	FX_zoomLines,
 ] as const satisfies ImageEffectorFx<string, any>[];
diff --git a/packages/frontend/src/utility/image-effector/fxs/threshold.ts b/packages/frontend/src/utility/image-effector/fxs/threshold.ts
new file mode 100644
index 0000000000..5702538689
--- /dev/null
+++ b/packages/frontend/src/utility/image-effector/fxs/threshold.ts
@@ -0,0 +1,71 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { defineImageEffectorFx } from '../ImageEffector.js';
+import { i18n } from '@/i18n.js';
+
+const shader = `#version 300 es
+precision mediump float;
+
+in vec2 in_uv;
+uniform sampler2D u_texture;
+uniform vec2 u_resolution;
+uniform float u_r;
+uniform float u_g;
+uniform float u_b;
+out vec4 out_color;
+
+void main() {
+	vec4 in_color = texture(u_texture, in_uv);
+	float r = in_color.r < u_r ? 0.0 : 1.0;
+	float g = in_color.g < u_g ? 0.0 : 1.0;
+	float b = in_color.b < u_b ? 0.0 : 1.0;
+	out_color = vec4(r, g, b, in_color.a);
+}
+`;
+
+export const FX_threshold = defineImageEffectorFx({
+	id: 'threshold' as const,
+	name: i18n.ts._imageEffector._fxs.threshold,
+	shader,
+	params: {
+		r: {
+			type: 'number' as const,
+			default: 0.5,
+			min: 0.0,
+			max: 1.0,
+			step: 0.01,
+		},
+		g: {
+			type: 'number' as const,
+			default: 0.5,
+			min: 0.0,
+			max: 1.0,
+			step: 0.01,
+		},
+		b: {
+			type: 'number' as const,
+			default: 0.5,
+			min: 0.0,
+			max: 1.0,
+			step: 0.01,
+		},
+	},
+	main: ({ gl, program, params, preTexture }) => {
+		gl.activeTexture(gl.TEXTURE0);
+		gl.bindTexture(gl.TEXTURE_2D, preTexture);
+		const u_texture = gl.getUniformLocation(program, 'u_texture');
+		gl.uniform1i(u_texture, 0);
+
+		const u_r = gl.getUniformLocation(program, 'u_r');
+		gl.uniform1f(u_r, params.r);
+
+		const u_g = gl.getUniformLocation(program, 'u_g');
+		gl.uniform1f(u_g, params.g);
+
+		const u_b = gl.getUniformLocation(program, 'u_b');
+		gl.uniform1f(u_b, params.b);
+	},
+});
diff --git a/packages/frontend/src/utility/image-effector/fxs/zoomLines.ts b/packages/frontend/src/utility/image-effector/fxs/zoomLines.ts
new file mode 100644
index 0000000000..6bcd17e573
--- /dev/null
+++ b/packages/frontend/src/utility/image-effector/fxs/zoomLines.ts
@@ -0,0 +1,71 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import { defineImageEffectorFx } from '../ImageEffector.js';
+import { i18n } from '@/i18n.js';
+
+const shader = `#version 300 es
+precision mediump float;
+
+in vec2 in_uv;
+uniform sampler2D u_texture;
+uniform vec2 u_resolution;
+uniform vec2 u_pos;
+uniform float frequency;
+out vec4 out_color;
+
+void main() {
+	vec4 in_color = texture(u_texture, in_uv);
+	float t = atan(u_pos.y + (in_uv.y - 0.5), u_pos.x + (in_uv.x - 0.5));
+	t = sin(t * frequency);
+	out_color = vec4(
+		mix(in_color.r, 1.0, t),
+		mix(in_color.g, 1.0, t),
+		mix(in_color.b, 1.0, t),
+		in_color.a
+	);
+}
+`;
+
+export const FX_zoomLines = defineImageEffectorFx({
+	id: 'zoomLines' as const,
+	name: i18n.ts._imageEffector._fxs.zoomLines,
+	shader,
+	params: {
+		x: {
+			type: 'number' as const,
+			default: 0.0,
+			min: -1.0,
+			max: 1.0,
+			step: 0.01,
+		},
+		y: {
+			type: 'number' as const,
+			default: 0.0,
+			min: -1.0,
+			max: 1.0,
+			step: 0.01,
+		},
+		frequency: {
+			type: 'number' as const,
+			default: 30.0,
+			min: 1.0,
+			max: 200.0,
+			step: 0.1,
+		},
+	},
+	main: ({ gl, program, params, preTexture }) => {
+		gl.activeTexture(gl.TEXTURE0);
+		gl.bindTexture(gl.TEXTURE_2D, preTexture);
+		const u_texture = gl.getUniformLocation(program, 'u_texture');
+		gl.uniform1i(u_texture, 0);
+
+		const u_pos = gl.getUniformLocation(program, 'u_pos');
+		gl.uniform2f(u_pos, -(params.x / 2.0), -(params.y / 2.0));
+
+		const u_frequency = gl.getUniformLocation(program, 'frequency');
+		gl.uniform1f(u_frequency, params.frequency);
+	},
+});